Borg BL5051 Mechanical Digital Lock - Lever/Lever Back-to-Back - Multiple Finishes Including Marine Grade Pro
At A Glance
At A Glance
DISPATCHSame Day Before 11am
REAL INSTALLS13 BL5000 Series Photos
PIN Code (Both Sides)The Borg BL5051 is a fully mechanical digital lock in a lever/lever back-to-back (BTB) configuration: a full lever keypad on both faces of the door, each with its own independent coding chamber, driving a 60mm tubular latch. A code is required to pass through in either direction - with a different code on each side if wanted.
This listing covers three finishes chosen on this page: Polished Chrome (BL5051MG), Satin Chrome (BL5051SC) and Black (BL5051MGPRO). The black variant is not simply a colour - it is Borg's Marine Grade Pro construction, with 316 stainless steel internal components under the MG Pro marine coating, salt spray tested to 1,000 hours. The chrome variants are for sheltered and internal doors, not coastal positions.
Borg makes the BL5000 series for medium to heavy duty doors and cycle tests it to 100,000 operations. The code is changed On The Bench, so this lock suits doors where the code rarely changes - for an on-door code change see the Easicode Pro BL5051MGECP and BL5051MGPROECP. Being entirely mechanical, it needs no batteries, wiring or power at any point. Because a code is needed to get out, it is not for fire doors, emergency exit or fire egress doors. Browse the full battery-free range in our Digital Mechanical Locks category.
Estimated Dispatch
Usually ships same day if ordered before 11am AEST (excludes weekends and Queensland public holidays).
Usually ships same day if ordered before 11am AEST (excludes weekends and Queensland public holidays).
BL5051MGPRO (Black) - Marine Grade Pro - Not Just a Colour
The black variant uses 316 stainless steel internal components under the MG Pro marine external coating, salt spray tested to 1,000 continuous hours - a laboratory cabinet result (the finish held up that long in continuous salt fog), not a promise of service life on the coast - and a materially different specification to the Polished Chrome and Satin Chrome variants. Choose the Black MG Pro for coastal, beachside, pool and marine positions. Background: do you actually need MG Pro? and the honest brand corrosion comparison.
The black variant uses 316 stainless steel internal components under the MG Pro marine external coating, salt spray tested to 1,000 continuous hours - a laboratory cabinet result (the finish held up that long in continuous salt fog), not a promise of service life on the coast - and a materially different specification to the Polished Chrome and Satin Chrome variants. Choose the Black MG Pro for coastal, beachside, pool and marine positions. Background: do you actually need MG Pro? and the honest brand corrosion comparison.
Corrosion Resistance Warranted - 12 Months (BL5051MGPRO)
Borg warrants corrosion resistance on the MG Pro finish for 12 months from date of sale under specified conditions - follow the routine in the maintenance notes; see the warranty details.
Borg warrants corrosion resistance on the MG Pro finish for 12 months from date of sale under specified conditions - follow the routine in the maintenance notes; see the warranty details.
Polished Chrome and Satin Chrome - Not for Coastal Positions
The Polished Chrome (BL5051MG, external grade) and Satin Chrome (BL5051SC) variants suit sheltered external and internal doors, but they are not for coastal, beachside or saltwater-adjacent positions - salt air attacks standard finishes; see our coastal conditions guide. At the coast, choose the Black MG Pro variant on this page, or the BL5051MGPROECP for Marine Grade Pro with an on-door code change.
The Polished Chrome (BL5051MG, external grade) and Satin Chrome (BL5051SC) variants suit sheltered external and internal doors, but they are not for coastal, beachside or saltwater-adjacent positions - salt air attacks standard finishes; see our coastal conditions guide. At the coast, choose the Black MG Pro variant on this page, or the BL5051MGPROECP for Marine Grade Pro with an on-door code change.
Not for Fire Doors, Emergency Exit or Fire Egress Doors
This back-to-back lock needs a code to get out: full keypads sit on both faces, and the inside lever will not withdraw the latch until the correct PIN is entered. It is not for fire doors, and not for emergency exit or fire egress doors; see exit paths on double-sided locks. If free inside egress is required, choose the single-sided Borg BL5001 - the same BL5000 series lever keypad and finishes with an inside lever that always opens, and fire tested to AS 1905.1-2005 for fire doors.
This back-to-back lock needs a code to get out: full keypads sit on both faces, and the inside lever will not withdraw the latch until the correct PIN is entered. It is not for fire doors, and not for emergency exit or fire egress doors; see exit paths on double-sided locks. If free inside egress is required, choose the single-sided Borg BL5001 - the same BL5000 series lever keypad and finishes with an inside lever that always opens, and fire tested to AS 1905.1-2005 for fire doors.
Code Change Requires Keypad Removal - On The Bench
This is a non-ECP model: changing a PIN means taking that side's keypad off the door and working On The Bench. Remove the 4 red screws, lift the cover panel carefully (springs are attached), hold C down throughout, then reposition the red (coded) and blue (uncoded) code pieces with the supplied tweezers - square cut-outs facing outward, coloured marks facing upward. Each side is changed independently, with over 2,000 combinations per side. It is a fiddly job the first time - read the bench method step by step and the traps to avoid before starting, and Borg's own steps are in the BL5000 Series Non-ECP Manual (PDF). If codes will change often - rentals, strata, staff turnover - choose an Easicode Pro back-to-back instead: the BL5051MGECP (external grade) or the BL5051MGPROECP (Marine Grade Pro), both changed on the door.
This is a non-ECP model: changing a PIN means taking that side's keypad off the door and working On The Bench. Remove the 4 red screws, lift the cover panel carefully (springs are attached), hold C down throughout, then reposition the red (coded) and blue (uncoded) code pieces with the supplied tweezers - square cut-outs facing outward, coloured marks facing upward. Each side is changed independently, with over 2,000 combinations per side. It is a fiddly job the first time - read the bench method step by step and the traps to avoid before starting, and Borg's own steps are in the BL5000 Series Non-ECP Manual (PDF). If codes will change often - rentals, strata, staff turnover - choose an Easicode Pro back-to-back instead: the BL5051MGECP (external grade) or the BL5051MGPROECP (Marine Grade Pro), both changed on the door.
Independent Coding Chambers - Different Codes Each Side
Each keypad has its own mechanical coding chamber. Both sides can share one code, or each side can run a different code - a shared entry code with a staff-only exit code, for example.
Each keypad has its own mechanical coding chamber. Both sides can share one code, or each side can run a different code - a shared entry code with a staff-only exit code, for example.
Free Passage - the F Button, Per Side
Either side can be set to free passage during business hours: enter that side's code and press F before you push the lever down - the lever then stays free and withdraws the latch without a code until you cancel it. To cancel, press F then C. If free passage should never be available on a side, the F piece can be taken out of that side's coding chamber On The Bench (the BLSFTUMBLER puts it back). More on passage mode vs holdback mode.
Either side can be set to free passage during business hours: enter that side's code and press F before you push the lever down - the lever then stays free and withdraws the latch without a code until you cancel it. To cancel, press F then C. If free passage should never be available on a side, the F piece can be taken out of that side's coding chamber On The Bench (the BLSFTUMBLER puts it back). More on passage mode vs holdback mode.
Fully Mechanical - No Batteries Required
Entirely mechanical - no power source, no wiring, no batteries to go flat. Weighing this against an app-connected lock? See mechanical digital vs smart locks and Buyer's Guide Chapter 16.
Entirely mechanical - no power source, no wiring, no batteries to go flat. Weighing this against an app-connected lock? See mechanical digital vs smart locks and Buyer's Guide Chapter 16.
Designed for medium to heavy usage areas
Plant rooms, storerooms, staff-only doors and gates where both-sided code control is the requirement. Borg makes the BL5000 series for medium to heavy duty doors, with a strengthened clutch and coding chamber, and cycle tests it to 100,000 operations.
Plant rooms, storerooms, staff-only doors and gates where both-sided code control is the requirement. Borg makes the BL5000 series for medium to heavy duty doors, with a strengthened clutch and coding chamber, and cycle tests it to 100,000 operations.
Not recommended for extremely high traffic without a servicing schedule
For relentless commercial traffic, step up to the Lockwood 3572DX, Borg BL7701, or Carbine CDL7200LL-HD - see what heavy duty actually means.
For relentless commercial traffic, step up to the Lockwood 3572DX, Borg BL7701, or Carbine CDL7200LL-HD - see what heavy duty actually means.
Single PIN Code Per Keypad
Each keypad holds one active PIN code at a time (the two sides can differ). No multi-user code list and no audit trail - the honest limitation of every mechanical digital lock; see what these locks will not do.
Each keypad holds one active PIN code at a time (the two sides can differ). No multi-user code list and no audit trail - the honest limitation of every mechanical digital lock; see what these locks will not do.
Access Methods
This is a mechanical digital lock with a lever keypad on both faces: the correct code opens the door from either side, and there is no free inside lever. There is no key override, app, fob or card on this model - for keyed entry on a back-to-back, see the BL5771MGPROECP in the range table below.
Key Features
- Lever/lever back-to-back keypads - a code is required from both sides; no free inside egress.
- Independent coding chambers - a different code can be set on each side.
- Free passage function (F button) per side - hold either side open during business hours.
- Three finishes on this listing: Polished Chrome (BL5051MG), Satin Chrome (BL5051SC) and Black Marine Grade Pro (BL5051MGPRO).
- BL5051MGPRO (Black) - 316 stainless steel internals under the MG Pro marine coating, salt spray tested to 1,000 hours, corrosion resistance warranted for 12 months - the coastal choice.
- BL5051MG (Polished Chrome) - external grade, weather resistant, not for coastal positions.
- BL5051SC (Satin Chrome) - PVD finish for sheltered external and internal doors, not for coastal positions.
- Medium to heavy duty BL5000 series - strengthened clutch and coding chamber, cycle tested to 100,000 operations (Borg BL5000 Series Brochure).
- On The Bench code change - over 2,000 combinations per side (Borg BL5000 Series Brochure); code length adjustable; digits entered in any order.
- Not for fire doors, emergency exit or fire egress doors - a code is required to exit from inside.
- Fully mechanical - no batteries, no wiring, no power source.
- 60mm anti-thrust stainless steel tubular latch; 70mm and 28mm narrow stile latches available separately.
- Soft grip lever handles on both sides with clutching action - the lever spins freely without a valid code, so it cannot be forced.
- Door thickness 35mm to 80mm on the standard fixings; up to 85mm with the XL fixing kit.
- Reversible on site for left or right hand doors - no handed ordering.
What's in the Box
- Borg BL5051 outside keypad and lever assembly (selected finish)
- Inside keypad and lever assembly - identical unit (selected finish)
- 60mm heavy duty anti-thrust tubular latch
- Strike plate and box keep
- 2 x spindles (80mm and 90mm)
- M4 fixing screws (40mm, 50mm and 60mm options)
- 4 x 16mm screws
- 2 x coded code pieces (red - spare)
- 2 x non-coded code pieces (blue - spare)
- Tweezers (for the On The Bench code change)
- Hex wrench (Allen key)
- Handle screw rubber grommet
A 70mm backset latch, a 28mm narrow stile latch and the XL fixing kit for 85mm doors are available separately - see Accessories and Spare Parts. No batteries or wiring are required or supplied.
Suitable Uses
- Coastal, beachside, poolside and marine positions - choose the Black MG Pro variant (BL5051MGPRO); see our external gate exposed to rain category.
- Sheltered external doors - Polished Chrome (BL5051MG) or Satin Chrome (BL5051SC).
- Internal commercial, amenities, storeroom, plant room and server room doors that need code control in both directions - browse our internal door locks.
- Gates where both sides must be coded - see when to consider a double-sided lock.
- Two-zone control - a shared entry code on one side and a staff-only code on the other, using the independent coding chambers.
- Sites where the code rarely changes - if codes change often, the Easicode Pro BL5051MGECP and BL5051MGPROECP are the better buy.
- Not for fire doors, emergency exit or fire egress doors - a code is needed to get out (see the warning above).
Available Finish Options
All three variants are chosen on this page. The finishes are not equal in weather grade - the Black variant carries a different, marine specification.
Polished Chrome
BL5051MG
External grade
Satin Chrome
BL5051SC
Sheltered or internal
Black - Marine Grade Pro
BL5051MGPRO
Coastal
All three finishes share the same mechanical specification - only the weather grade differs, and only the Black MG Pro variant is built for coastal positions.
Borg Back-to-Back Range Compared
Every model below puts a keypad on both sides of the door, all fully mechanical with no batteries. The differences are the lock format, the key function, the code change method and the weather grade.
ECP = Easicode Pro on-door code change. MG Pro = Marine Grade Pro. Combinations are per side on every model. Want a knob keypad with a free inside exit instead? The single-sided BL5101 is a knob keypad lock on the same platform.
Accessories and Spare Parts
Borg supports the 5000 series platform with a full spare parts range - one of the reasons it outlasts hardware store imitations. Match the grade to the variant: black MG Pro parts for the Black MG Pro, satin chrome and stainless parts for the chrome variants.
Spare coded (red) and non-coded (blue) code pieces ship in the box; extra code pieces and the XL fixing kit for 85mm doors can be arranged through us - contact us. Browse all tubular latches and bolts and scar and adaptor plates.
Full Specifications
Dimensions
The BL5051 uses the same BL5000 series keypad body on both faces of the door - the inside unit is identical to the outside unit, not a slim handle plate.
Back-to-back keypad and lever - 177mm H x 48mm W x 26mm body depth; the drawing also marks the lever at 115mm and 89mm. Full-width drawings are in the Dimensions tab.
Frequently Asked Questions
How do I change the PIN code on this model?
On The Bench. Take the relevant keypad off the door, remove the 4 red screws, carefully lift the cover panel (springs attached), hold C down, and use the supplied tweezers to reposition the red (coded) and blue (uncoded) code pieces - square cut-outs outward, coloured marks upward. Each side is changed independently. Test the new code at least five times before rehanging - the full procedure is at the bench method guide, and read the traps first. If you expect to change codes regularly, the Easicode Pro BL5051MGECP changes on the door.
On The Bench. Take the relevant keypad off the door, remove the 4 red screws, carefully lift the cover panel (springs attached), hold C down, and use the supplied tweezers to reposition the red (coded) and blue (uncoded) code pieces - square cut-outs outward, coloured marks upward. Each side is changed independently. Test the new code at least five times before rehanging - the full procedure is at the bench method guide, and read the traps first. If you expect to change codes regularly, the Easicode Pro BL5051MGECP changes on the door.
Why does this lock need a code from the inside?
The BL5051 is the back-to-back version of the single-sided BL5001. Where the BL5001's inside lever always turns freely, the BL5051 puts a full keypad on both faces, so access is controlled in both directions - the point of the product on gates and secure rooms, and why single-sided locks fall short on gates. It also means the BL5051 is not for fire doors, emergency exit or fire egress doors - if free exit is required, choose the BL5001.
The BL5051 is the back-to-back version of the single-sided BL5001. Where the BL5001's inside lever always turns freely, the BL5051 puts a full keypad on both faces, so access is controlled in both directions - the point of the product on gates and secure rooms, and why single-sided locks fall short on gates. It also means the BL5051 is not for fire doors, emergency exit or fire egress doors - if free exit is required, choose the BL5001.
Which finish should I choose for a coastal position?
The Black MG Pro (BL5051MGPRO). It has 316 stainless steel internal components under the MG Pro black marine coating, salt spray tested to 1,000 hours. The Polished Chrome and Satin Chrome variants suit sheltered and internal doors only - in salt air those finishes corrode. The detail is at salt spray ratings explained.
The Black MG Pro (BL5051MGPRO). It has 316 stainless steel internal components under the MG Pro black marine coating, salt spray tested to 1,000 hours. The Polished Chrome and Satin Chrome variants suit sheltered and internal doors only - in salt air those finishes corrode. The detail is at salt spray ratings explained.
Can each side have a different code?
Yes. Each lever keypad has its own independent coding chamber. Both sides can share one code, or each can be set to a completely different code during the On The Bench code change - and the free passage function is engaged and released per side too.
Yes. Each lever keypad has its own independent coding chamber. Both sides can share one code, or each can be set to a completely different code during the On The Bench code change - and the free passage function is engaged and released per side too.
Can I reverse the handing on site?
Yes. Units ship factory set for right-hand doors. To change to left-hand: remove the rubber grommet at the base of each keypad handle, use the included hex wrench to remove the grub screw, rotate the handle 180 degrees and refit. Handing is determined from the outside of the door - right hand means hinges on the right. Background: understanding door handing in Australia.
Yes. Units ship factory set for right-hand doors. To change to left-hand: remove the rubber grommet at the base of each keypad handle, use the included hex wrench to remove the grub screw, rotate the handle 180 degrees and refit. Handing is determined from the outside of the door - right hand means hinges on the right. Background: understanding door handing in Australia.
Additional Information
Maintenance:
Monthly: wipe both keypads, both levers and the exposed latch with a light spray of silicon-based lubricant (such as GT85) and remove the excess with a soft cloth. Do not use oil-based lubricants such as WD-40 - they attract dirt and wear down internal parts over time. Annually: remove the keypads from the door, spray the inside through the code piece holes on the reverse of each keypad with silicon-based lubricant, spray all fixings, accessories and the latch with silicon-based lubricant, then press each button and operate both levers several times to confirm smooth operation. Full steps are in the Borg Lock Servicing Guide (PDF). On the Black MG Pro in a coastal position, keep to the monthly routine.
Monthly: wipe both keypads, both levers and the exposed latch with a light spray of silicon-based lubricant (such as GT85) and remove the excess with a soft cloth. Do not use oil-based lubricants such as WD-40 - they attract dirt and wear down internal parts over time. Annually: remove the keypads from the door, spray the inside through the code piece holes on the reverse of each keypad with silicon-based lubricant, spray all fixings, accessories and the latch with silicon-based lubricant, then press each button and operate both levers several times to confirm smooth operation. Full steps are in the Borg Lock Servicing Guide (PDF). On the Black MG Pro in a coastal position, keep to the monthly routine.
Not for Fire Doors:
This back-to-back lock needs a code to get out, so it is not for fire doors, emergency exit or fire egress doors. For a fire door or a door on an exit path, choose a single-sided lock with a free inside lever - the BL5001 is fire tested to AS 1905.1-2005. See what is actually compliant on apartment fire doors.
This back-to-back lock needs a code to get out, so it is not for fire doors, emergency exit or fire egress doors. For a fire door or a door on an exit path, choose a single-sided lock with a free inside lever - the BL5001 is fire tested to AS 1905.1-2005. See what is actually compliant on apartment fire doors.
Retrofitting a Lockwood 3572 Mortice:
If the door already carries a Lockwood 3572 mortice lock, the BL50013572KBTB back-to-back adaptor kit mounts 5000 series keypads on both faces of the existing mortice prep - no re-boring the door for the tubular latch. A code is then needed to leave as well as enter, so the same exit path caution applies.
If the door already carries a Lockwood 3572 mortice lock, the BL50013572KBTB back-to-back adaptor kit mounts 5000 series keypads on both faces of the existing mortice prep - no re-boring the door for the tubular latch. A code is then needed to leave as well as enter, so the same exit path caution applies.
Change Codes Often? Consider the ECP Back-to-Backs:
The On The Bench method suits a set-and-forget code. If your site retires codes regularly - holiday lets, strata, staff turnover - the on-door Easicode Pro back-to-backs turn the bench job into a change on the door: BL5051MGECP (external grade) or the marine BL5051MGPROECP - background at why ECP matters and how long each method really takes.
The On The Bench method suits a set-and-forget code. If your site retires codes regularly - holiday lets, strata, staff turnover - the on-door Easicode Pro back-to-backs turn the bench job into a change on the door: BL5051MGECP (external grade) or the marine BL5051MGPROECP - background at why ECP matters and how long each method really takes.
Coastal Spares - Match the Grade:
On a Black MG Pro coastal installation, keep the spares in the same grade: the BLSMGPRO560 / BLSMGPRO570 black MG Pro latch and the SPBL5001MB black scar plates. The BL5000KMG spare keypad is chrome plated external grade, not MG Pro - ask us before fitting it at the coast.
On a Black MG Pro coastal installation, keep the spares in the same grade: the BLSMGPRO560 / BLSMGPRO570 black MG Pro latch and the SPBL5001MB black scar plates. The BL5000KMG spare keypad is chrome plated external grade, not MG Pro - ask us before fitting it at the coast.
Warranty
Borg Locks Warranty - 12 Months (Australia)
All Borg locks are warranted against mechanical defects in materials and workmanship under normal use and service for a minimum of 12 months from date of sale. The warranty does not cover damage arising from misuse, vandalism, or improper installation. The lock must not be dismantled - doing so will invalidate the warranty. Proof of purchase required for all claims.
All Borg locks are warranted against mechanical defects in materials and workmanship under normal use and service for a minimum of 12 months from date of sale. The warranty does not cover damage arising from misuse, vandalism, or improper installation. The lock must not be dismantled - doing so will invalidate the warranty. Proof of purchase required for all claims.
Purchased through Terry's Tradies Pty Ltd or one of its associated trading names? Contact us first - we will manage your warranty claim with the Australian distributor (LSC) on your behalf. This warranty operates alongside your rights under the Australian Consumer Law.
Download PDF Resources
Borg BL5000 Series Non-ECP Manual (PDF)
Borg's five-page manual for the On The Bench BL5000 series - parts list, handing, latch fitting, the code change, the F button free passage function, troubleshooting and a drilling template. It is written around the single-sided lever models; on this back-to-back the same code change steps apply to each keypad.
Borg's five-page manual for the On The Bench BL5000 series - parts list, handing, latch fitting, the code change, the F button free passage function, troubleshooting and a drilling template. It is written around the single-sided lever models; on this back-to-back the same code change steps apply to each keypad.
Borg BL5000 Series Installation and Code Change Guide (PDF)
Borg's five-page parts list, installation, On The Bench code change and troubleshooting guide for the BL5000 round bar lever series. The code change method inside is the one used on both of this lock's keypads.
Borg's five-page parts list, installation, On The Bench code change and troubleshooting guide for the BL5000 round bar lever series. The code change method inside is the one used on both of this lock's keypads.
Borg BL5001, BL5201 and BL5401 Drilling Template (PDF)
One-page drilling template (159mm hole centres, 60mm or 70mm backset) named for the single-sided BL5001, BL5201 and BL5401 lever locks. Check the fixing positions for this back-to-back with us before drilling.
One-page drilling template (159mm hole centres, 60mm or 70mm backset) named for the single-sided BL5001, BL5201 and BL5401 lever locks. Check the fixing positions for this back-to-back with us before drilling.
Borg BL5000 Series Brochure (PDF)
The BL5000 series in one page - handle styles (round bar, flat bar and knob), locking options including the back-to-back model, features (over 2,000 combinations, 100,000 cycles, free passage), finishes and dimensioned drawings of the keypads and inside handles.
The BL5000 series in one page - handle styles (round bar, flat bar and knob), locking options including the back-to-back model, features (over 2,000 combinations, 100,000 cycles, free passage), finishes and dimensioned drawings of the keypads and inside handles.
Borg 5000 Series Accessories Sheet (PDF)
Borg's one-page accessories sheet for the 5000 series - the BL5000KSC / BL5000KSS keypad-only units, the Lockwood mortice conversion kits and the SPBL5001 scar plates. The BL50013572KBTB back-to-back kit this page lists is sold separately.
Borg's one-page accessories sheet for the 5000 series - the BL5000KSC / BL5000KSS keypad-only units, the Lockwood mortice conversion kits and the SPBL5001 scar plates. The BL50013572KBTB back-to-back kit this page lists is sold separately.
Borg Lock Servicing Guide (PDF)
Borg's general maintenance guide for pushbutton keypad locks - monthly silicone-based lubricant care and an annual full service. This is the routine to follow for this lock.
Borg's general maintenance guide for pushbutton keypad locks - monthly silicone-based lubricant care and an annual full service. This is the routine to follow for this lock.
Borg BL5051 - FAQ, Setup and Owner's Guide
Everything below is here to help you choose a variant, install, code and live with the BL5051 back-to-back lock. For the wider category, start with Buyer's Guide Chapter 16 - Mechanical Digital Locks and the pillar explainer What Is a Mechanical Digital Lock?
Codes and Code Changing
How does the code entry actually work - is it like a phone keypad?
Not quite. This is a purely mechanical coding chamber: each keypad holds one code, and the digits are pressed in any order - the chamber only cares that the correct set of buttons is depressed. Press C first to clear any half-entered attempt, enter the code, then turn the lever.
Not quite. This is a purely mechanical coding chamber: each keypad holds one code, and the digits are pressed in any order - the chamber only cares that the correct set of buttons is depressed. Press C first to clear any half-entered attempt, enter the code, then turn the lever.
Should I set the codes before the lock goes on the door?
Yes. The codes can be set with the keypads on or off the door, but On The Bench is far easier - so set and verify both side codes before mounting. Know the current code, work with the door open, and test five times per side.
Yes. The codes can be set with the keypads on or off the door, but On The Bench is far easier - so set and verify both side codes before mounting. Know the current code, work with the door open, and test five times per side.
How long does an On The Bench code change really take?
Allow 15-20 minutes per side the first time, including removal and refitting. The steps: keypad off the door, 4 red screws out, cover panel lifted carefully (springs attached), C held down, tweezers to move the red and blue code pieces, panel back on, five successful tests, then rehang. The honest time comparison across Borg's methods is at how long code changes take, and the method itself at the Borg standard method. If that sounds like too much for your site, the Easicode Pro BL5051MGECP changes on the door.
Allow 15-20 minutes per side the first time, including removal and refitting. The steps: keypad off the door, 4 red screws out, cover panel lifted carefully (springs attached), C held down, tweezers to move the red and blue code pieces, panel back on, five successful tests, then rehang. The honest time comparison across Borg's methods is at how long code changes take, and the method itself at the Borg standard method. If that sounds like too much for your site, the Easicode Pro BL5051MGECP changes on the door.
What are the classic On The Bench code change mistakes?
Dropping a code piece (work over a tray), losing track of which code pieces came from which slots, coding the two sides differently by accident when they were meant to match, and rehanging without testing. The rules that prevent a lockout: know the current code, work with the door open, test five times per side. Full trap list: bench method traps.
Dropping a code piece (work over a tray), losing track of which code pieces came from which slots, coding the two sides differently by accident when they were meant to match, and rehanging without testing. The rules that prevent a lockout: know the current code, work with the door open, test five times per side. Full trap list: bench method traps.
What are the spare red and blue code pieces in the box for?
Red code pieces are coded (that button becomes part of the PIN), blue are uncoded. The spares let you lengthen or shorten a code. Extra code pieces are available from us, and the free passage F piece (BLSFTUMBLER) is sold separately - see spare code pieces explained.
Red code pieces are coded (that button becomes part of the PIN), blue are uncoded. The spares let you lengthen or shorten a code. Extra code pieces are available from us, and the free passage F piece (BLSFTUMBLER) is sold separately - see spare code pieces explained.
What happens if the code is forgotten - is there a key backup?
No - there is no key override on this model, which also means no cylinder to pick or corrode. With the door open, the code can be read from the code piece pattern On The Bench. With the door shut and both sides coded, it is a locksmith visit - contact us. If site policy requires a keyed bypass, the BL5771MGPROECP is the back-to-back with key override on both faces.
No - there is no key override on this model, which also means no cylinder to pick or corrode. With the door open, the code can be read from the code piece pattern On The Bench. With the door shut and both sides coded, it is a locksmith visit - contact us. If site policy requires a keyed bypass, the BL5771MGPROECP is the back-to-back with key override on both faces.
Can multiple people have their own codes, and is there a record of who came through?
No - one active code per keypad, no user list, no audit trail. That is the honest trade-off of every mechanical digital lock against an app-based system: see what these locks will not do and mechanical vs smart compared.
No - one active code per keypad, no user list, no audit trail. That is the honest trade-off of every mechanical digital lock against an app-based system: see what these locks will not do and mechanical vs smart compared.
Choosing Your Finish
Which variant do I choose - Polished Chrome, Satin Chrome or Black MG Pro?
Decide by exposure, not colour. Anywhere within reach of salt air - beachfront, canal estates, poolside, marinas - choose the Black MG Pro: 316 stainless steel internals under the MG Pro coating, salt spray tested to 1,000 hours. Sheltered external doors (under cover, away from the coast) suit the Polished Chrome, which is external grade; internal and lightly sheltered doors suit the Satin Chrome. When in doubt on the Gold Coast, choose the MG Pro - the guide is do you actually need MG Pro?
Decide by exposure, not colour. Anywhere within reach of salt air - beachfront, canal estates, poolside, marinas - choose the Black MG Pro: 316 stainless steel internals under the MG Pro coating, salt spray tested to 1,000 hours. Sheltered external doors (under cover, away from the coast) suit the Polished Chrome, which is external grade; internal and lightly sheltered doors suit the Satin Chrome. When in doubt on the Gold Coast, choose the MG Pro - the guide is do you actually need MG Pro?
What does 1,000 hours of salt spray actually prove?
Salt spray testing holds the finish in a sealed cabinet of continuous salt fog; the hours are how long it went before corrosion appeared. It is a laboratory result, not a promise of service life on the coast - but 1,000 hours with 316 stainless steel internals behind the coating is a very different specification from a standard finish. The explainer at salt spray ratings puts the figure on the corrosion scale, and MG Pro explained covers the construction.
Salt spray testing holds the finish in a sealed cabinet of continuous salt fog; the hours are how long it went before corrosion appeared. It is a laboratory result, not a promise of service life on the coast - but 1,000 hours with 316 stainless steel internals behind the coating is a very different specification from a standard finish. The explainer at salt spray ratings puts the figure on the corrosion scale, and MG Pro explained covers the construction.
Why choose a mechanical lock over a smart lock at the coast?
Electronics and salt air are a poor mix - corroded battery terminals, failed keypads and dead boards are the common coastal failure modes set out in the realities of electronic door locks. A fully mechanical MG Pro lock has none of those parts to fail, and the brand comparison sets Borg's MG Pro against the other brands' corrosion figures.
Electronics and salt air are a poor mix - corroded battery terminals, failed keypads and dead boards are the common coastal failure modes set out in the realities of electronic door locks. A fully mechanical MG Pro lock has none of those parts to fail, and the brand comparison sets Borg's MG Pro against the other brands' corrosion figures.
Fit and Installation
What latch do I need for a narrow gate frame?
The standard 60mm backset tubular latch needs a gate stile deep enough to take it. For narrow stiles there is a 28mm backset latch for the BL5000 series (BLS275000LH / BLS275000RH, handed, satin chrome) - confirm the fit with us before ordering. Measure first: gate post too narrow for a 60mm latch? On a steel gate, the BDS LB22 weld-on lock box takes a 60mm backset 5000 series lock.
The standard 60mm backset tubular latch needs a gate stile deep enough to take it. For narrow stiles there is a 28mm backset latch for the BL5000 series (BLS275000LH / BLS275000RH, handed, satin chrome) - confirm the fit with us before ordering. Measure first: gate post too narrow for a 60mm latch? On a steel gate, the BDS LB22 weld-on lock box takes a 60mm backset 5000 series lock.
Can I get a 70mm backset, and in which finish?
Yes - in satin chrome via the BLL500070, and in black marine grade via the BLSMGPRO570 MG Pro tube latch - the right choice on a Black MG Pro coastal installation, so the latch matches the lock's corrosion grade.
Yes - in satin chrome via the BLL500070, and in black marine grade via the BLSMGPRO570 MG Pro tube latch - the right choice on a Black MG Pro coastal installation, so the latch matches the lock's corrosion grade.
Which spindle do I use for my door thickness?
Two spindles are supplied (80mm and 90mm). The rule: door thickness + 30mm = minimum spindle length, because 15mm must seat into each keypad body. Use the longest that fits, and if cutting is needed, cut from the inside handle end only. For doors and gates up to 120mm thick there is the BLS527A XXL extended spindle kit - confirm the fit with us.
Two spindles are supplied (80mm and 90mm). The rule: door thickness + 30mm = minimum spindle length, because 15mm must seat into each keypad body. Use the longest that fits, and if cutting is needed, cut from the inside handle end only. For doors and gates up to 120mm thick there is the BLS527A XXL extended spindle kit - confirm the fit with us.
The door already has a Lockwood 3572 mortice - can this lock go straight on?
Yes, with the BL50013572KBTB back-to-back adaptor kit - it mounts 5000 series keypads on both faces of the existing 3572 mortice prep, driving the mortice instead of a tubular latch. A code is then needed to leave as well as enter. For open-out doors on the Lockwood 3582 prep there is the BL50013582K kit - ask us about it on a back-to-back. This retrofit range is a key advantage over hardware store lookalikes.
Yes, with the BL50013572KBTB back-to-back adaptor kit - it mounts 5000 series keypads on both faces of the existing 3572 mortice prep, driving the mortice instead of a tubular latch. A code is then needed to leave as well as enter. For open-out doors on the Lockwood 3582 prep there is the BL50013582K kit - ask us about it on a back-to-back. This retrofit range is a key advantage over hardware store lookalikes.
Is a code-to-exit lock allowed on a fire door?
No. A back-to-back lock needs a code to get out, so it is not for fire doors, and not for emergency exit or fire egress doors. For a fire door, choose a single-sided lock with a free inside lever: the BL5001 is fire tested to AS 1905.1-2005 (up to 4 hours, depending on the type of doorset). Background: exit paths, fire door certification, and why passage functions are not a fire-door fix.
No. A back-to-back lock needs a code to get out, so it is not for fire doors, and not for emergency exit or fire egress doors. For a fire door, choose a single-sided lock with a free inside lever: the BL5001 is fire tested to AS 1905.1-2005 (up to 4 hours, depending on the type of doorset). Background: exit paths, fire door certification, and why passage functions are not a fire-door fix.
Is this lock suitable for a pool gate?
A spring latch self-latches when the gate swings shut - the behaviour a pool barrier needs, where a deadbolt relies on someone throwing it; see pool gate requirements. On a back-to-back, a code is needed from the pool side too - check that suits the barrier and the people using it (double-sided locks on pool gates). Never leave free passage engaged on a pool gate - see why passage mode and pool gates do not mix.
A spring latch self-latches when the gate swings shut - the behaviour a pool barrier needs, where a deadbolt relies on someone throwing it; see pool gate requirements. On a back-to-back, a code is needed from the pool side too - check that suits the barrier and the people using it (double-sided locks on pool gates). Never leave free passage engaged on a pool gate - see why passage mode and pool gates do not mix.
Range and Spares
BL5051MG, BL5051SC, BL5051MGPRO - what do the suffixes mean?
Borg's naming stacks the designations: MG = external weather grade, SC = satin chrome, MG Pro = Marine Grade Pro (316 stainless internals, salt spray tested to 1,000 hours), and an ECP suffix adds the Easicode Pro on-door code change. The three variants on this page all change On The Bench; add ECP and you get the BL5051MGECP and BL5051MGPROECP standalone listings.
Borg's naming stacks the designations: MG = external weather grade, SC = satin chrome, MG Pro = Marine Grade Pro (316 stainless internals, salt spray tested to 1,000 hours), and an ECP suffix adds the Easicode Pro on-door code change. The three variants on this page all change On The Bench; add ECP and you get the BL5051MGECP and BL5051MGPROECP standalone listings.
I want a knob instead of a lever - is there a back-to-back for that?
On one side, yes: the BL5151SC puts a knob keypad on one face and a lever keypad on the other, on the same tubular latch platform. If what you need is a knob keypad with a free inside exit, the single-sided BL5101 is that lock. Knobs are harder to operate with full hands or limited grip - the lever remains the accessible choice.
On one side, yes: the BL5151SC puts a knob keypad on one face and a lever keypad on the other, on the same tubular latch platform. If what you need is a knob keypad with a free inside exit, the single-sided BL5101 is that lock. Knobs are harder to operate with full hands or limited grip - the lever remains the accessible choice.
Which parts are actually replaceable if something wears?
Almost everything: the keypad unit itself (BL5000KSC satin chrome or BL5000KMG chrome plated), the latches, the spring pack, the gaskets and the F piece - see the full Accessories and Spare Parts table. This spare parts depth is a core reason to buy a supported platform over a hardware store lookalike.
Almost everything: the keypad unit itself (BL5000KSC satin chrome or BL5000KMG chrome plated), the latches, the spring pack, the gaskets and the F piece - see the full Accessories and Spare Parts table. This spare parts depth is a core reason to buy a supported platform over a hardware store lookalike.
Is this heavy duty enough for a busy commercial doorway?
It is a medium to heavy duty lock - Borg makes the BL5000 series for medium to heavy duty doors - but it is not built for extremely high traffic without a servicing schedule. For genuinely relentless traffic, step up to a true heavy-duty platform: the Borg BL7701, Lockwood 3572DX or the dual-keypad Carbine CDL7200LL-KDSC-HD. Guidance at Ch 16 commercial use.
It is a medium to heavy duty lock - Borg makes the BL5000 series for medium to heavy duty doors - but it is not built for extremely high traffic without a servicing schedule. For genuinely relentless traffic, step up to a true heavy-duty platform: the Borg BL7701, Lockwood 3572DX or the dual-keypad Carbine CDL7200LL-KDSC-HD. Guidance at Ch 16 commercial use.
Servicing
What ongoing servicing does it need?
Monthly, a light wipe of both keypads, both levers and the exposed latch with a silicon-based lubricant (such as GT85) - never an oil-based lubricant such as WD-40. Once a year, take the keypads off the door, spray through the code piece holes on the back of each keypad and over the fixings and latch, then check every button and both levers. On the Black MG Pro in salt air, keep strictly to the monthly routine. Keypads, gaskets, latches, scar plates and the F piece are all separately orderable (Accessories table, main tab), and the full schedule is in the Borg Servicing Guide (PDF Files tab).
Monthly, a light wipe of both keypads, both levers and the exposed latch with a silicon-based lubricant (such as GT85) - never an oil-based lubricant such as WD-40. Once a year, take the keypads off the door, spray through the code piece holes on the back of each keypad and over the fixings and latch, then check every button and both levers. On the Black MG Pro in salt air, keep strictly to the monthly routine. Keypads, gaskets, latches, scar plates and the F piece are all separately orderable (Accessories table, main tab), and the full schedule is in the Borg Servicing Guide (PDF Files tab).
Related Products, Guides and Chapters
This lock and its siblings: BL5051MGECP - External Grade ECP - BL5051MGPROECP - Marine ECP Black - BL5771MGPROECP - BTB with Key Override - BL5050SC - Euro Mortice BTB, Key Lockout - BL5151SC - Knob/Lever BTB - BL5101 - Single-Sided Knob Keypad - BL5001 - Single-Sided, Free Egress
Accessories and spares: F Piece - MG Pro Tube Latch 60/70mm Black - Spare Keypad - Satin - Spare Keypad - Chrome Plated - Black Scar Plates - 3572 BTB Adaptor Kit - Spring Accessories Packet - LB22 Weld-On Lock Box
Cross-brand alternatives: Carbine CDL7200LL-KDSC-HD Dual Keypad - Lockwood 3572DX - Borg BL7701 Heavy Duty - Carbine CDL7200LL-HD Dual Lever
Buyer's Guide chapters: Ch 16 Mechanical Digital Locks - Ch 16 Borg Naming Decoded - Ch 16 Code Changing Methods - Ch 16 Choosing a Model - Ch 10 Borg Brand Profile
Helpful blog reading: Changing Codes - The Bench Method - MG Pro and ECP Explained - Why Double-Sided Locks Suit Gates - Lockwood vs Borg vs Carbine - Heavy Duty Commercial Mech-Digi - Latch vs Bolt Formats - The Realities of Electronic Door Locks - Why Our Range Beats Imitations
What's In The Box - Borg BL5051 (BL5051MG / BL5051SC / BL5051MGPRO)
- Borg BL5051 outside keypad and lever assembly (selected finish)
- Inside keypad and lever assembly - identical unit (selected finish)
- 60mm heavy duty anti-thrust tubular latch
- Strike plate and box keep
- 2 x spindles (80mm and 90mm)
- M4 fixing screws (40mm, 50mm and 60mm options)
- 4 x 16mm screws
- 2 x coded code pieces (red - spare)
- 2 x non-coded code pieces (blue - spare)
- Tweezers (for the On The Bench code change)
- Hex wrench (Allen key)
- Handle screw rubber grommet
The Black MG Pro variant (BL5051MGPRO) is built with 316 stainless steel internal components; the Polished Chrome and Satin Chrome variants use external grade and PVD components. The box contents are otherwise the same across all three. A 70mm latch, a 28mm narrow stile latch and the XL fixing kit for 85mm doors are available separately - contact us. No batteries or wiring are required or supplied.
Borg BL5000 Series - Real Installations
These installs show the single-sided BL5001 in satin stainless - the same BL5000 series lever keypad the BL5051 carries on both faces of the door.
Borg BL5051 - Dimensions
On this back-to-back model the inside unit is the same BL5000 series keypad body as the outside unit - both faces measure identically. Dimensions apply to all three finish variants.
Back-to-back keypad and lever drawing: keypad body 177mm high x 48mm wide and 26mm deep from the door face; the drawing also marks the lever at 115mm and 89mm. These are the figures used in the dimensions table on the Description tab.
Borg's orthographic drawing of the BL5000 series keypad - 177mm high, 48mm wide and 26mm deep; the drawing also marks the lever at 115mm and 89mm. On this back-to-back model the same keypad sits on both faces of the door.
Standard 60mm backset (70mm and 28mm narrow stile latches available separately). Fixings suit doors 35-80mm on the standard kit; up to 85mm with the XL fixing kit.
Borg BL5000 Series - Product Brochure
BL5000 Series brochure - handle styles, locking options, features, finishes and keypad dimensions
PDF Files - Borg BL5051
Borg BL5000 Series Non-ECP Manual (PDF)
Borg's five-page manual for the On The Bench BL5000 series - parts list, handing, latch fitting, the code change, the F button free passage function, troubleshooting and a drilling template. It is written around the single-sided lever models; on this back-to-back the same code change steps apply to each keypad.
Borg's five-page manual for the On The Bench BL5000 series - parts list, handing, latch fitting, the code change, the F button free passage function, troubleshooting and a drilling template. It is written around the single-sided lever models; on this back-to-back the same code change steps apply to each keypad.
Borg BL5000 Series Installation and Code Change Guide (PDF)
Borg's five-page parts list, installation, On The Bench code change and troubleshooting guide for the BL5000 round bar lever series. The code change method inside is the one used on both of this lock's keypads.
Borg's five-page parts list, installation, On The Bench code change and troubleshooting guide for the BL5000 round bar lever series. The code change method inside is the one used on both of this lock's keypads.
Borg BL5001, BL5201 and BL5401 Drilling Template (PDF)
One-page drilling template (159mm hole centres, 60mm or 70mm backset) named for the single-sided BL5001, BL5201 and BL5401 lever locks. Check the fixing positions for this back-to-back with us before drilling.
One-page drilling template (159mm hole centres, 60mm or 70mm backset) named for the single-sided BL5001, BL5201 and BL5401 lever locks. Check the fixing positions for this back-to-back with us before drilling.
Borg BL5000 Series Brochure (PDF)
The BL5000 series in one page - handle styles (round bar, flat bar and knob), locking options including the back-to-back model, features (over 2,000 combinations, 100,000 cycles, free passage), finishes and dimensioned drawings of the keypads and inside handles.
The BL5000 series in one page - handle styles (round bar, flat bar and knob), locking options including the back-to-back model, features (over 2,000 combinations, 100,000 cycles, free passage), finishes and dimensioned drawings of the keypads and inside handles.
Borg 5000 Series Accessories Sheet (PDF)
Borg's one-page accessories sheet for the 5000 series - the BL5000KSC / BL5000KSS keypad-only units, the Lockwood mortice conversion kits and the SPBL5001 scar plates. The BL50013572KBTB back-to-back kit this page lists is sold separately.
Borg's one-page accessories sheet for the 5000 series - the BL5000KSC / BL5000KSS keypad-only units, the Lockwood mortice conversion kits and the SPBL5001 scar plates. The BL50013572KBTB back-to-back kit this page lists is sold separately.
Borg Lock Servicing Guide (PDF)
Borg's general maintenance guide for pushbutton keypad locks - monthly silicone-based lubricant care and an annual full service. This is the routine to follow for this lock.
Borg's general maintenance guide for pushbutton keypad locks - monthly silicone-based lubricant care and an annual full service. This is the routine to follow for this lock.
Borg Locks Warranty
Borg products sold in Australia are covered against mechanical defects in materials and workmanship under normal use and service. Warranty claims are handled by Terry's Tradies Pty Ltd and its associated websites, trading names, and subsidiaries.
Warranty Summary
What the Warranty Covers
- Mechanical defects in materials and workmanship
- Defects arising under normal use and service conditions
- Repair or replacement of defective units at the discretion of the Australian distributor (LSC)
What the Warranty Does Not Cover
- Damage arising from misuse, vandalism, or abuse
- Damage resulting from improper installation
- Locks that have been dismantled - dismantling invalidates the warranty
- Normal wear and tear
- Cosmetic damage not affecting function
How to Make a Claim
For full returns and warranty claim procedures, visit our Returns & Warranty page - this is kept up to date and is the authoritative reference for current claim steps.
- Contact Terry's Tradies Pty Ltd first if you purchased through us or one of its associated trading names - we will assess the issue and manage the warranty process with LSC on your behalf. You do not need to contact LSC or Borg Locks UK directly.
- Have your proof of purchase ready (receipt or order confirmation).
- Warranty claims for Borg products in Australia are processed through LSC, the authorised Australian importer and distributor. Where an item is returned to LSC, freight charges must be prepaid and the item returned within the warranty period.
- If LSC finds the returned item to be defective, it will be repaired or replaced, and a detailed assessment report is provided to the customer after examination.
Australian Consumer Law
Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure. The Borg manufacturer warranty above operates alongside - and does not limit - these statutory rights.
Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure. The Borg manufacturer warranty above operates alongside - and does not limit - these statutory rights.
Confused? Overwhelmed? We get it.
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