Borg BL5101 Mechanical Digital Lock - Knob Keypad - Tubular Latch - Satin Chrome and Satin Stainless
At A Glance
The Borg BL5101 is a fully mechanical digital lock with a knob keypad outside and a plain knob inside, driving a 60mm tubular latch. Enter the code and turn the outside knob to withdraw the latch; the inside knob always turns, so there is free exit from inside without a code.
It is the knob keypad version of Borg's BL5000 series, which Borg makes for medium to heavy duty doors and cycle tests to 100,000 operations, in Satin Chrome (BL5101SC) or Satin Stainless (BL5101SS) - both chosen on this page. The code is changed On The Bench, with over 2,000 combinations.
The BL5101 is not fire tested, so it is not for fire doors - the lever BL5001 is. It is a special order item: contact us for the dispatch time before ordering. Being entirely mechanical, it needs no batteries or wiring. Browse the full battery-free range in our Digital Mechanical Locks category.
The BL5101 is a special order item rather than a same-day stock line. Contact us before ordering and we will confirm the estimated dispatch time and the availability of your finish.
The BL5101 has not been fire tested, so it is not for fire door assemblies. The lever BL5001 has been tested up to 4 hours (depending on the type of doorset) on fire door assemblies in accordance with AS 1905.1-2005. For a fire door, choose the BL5001, or browse our fire door rated lock range.
The inside knob always turns, so no code is ever needed to open the door from inside. If you need a code on both faces instead, the back-to-back BL5151SC puts a knob keypad on one side and a lever keypad on the other - but a back-to-back lock needs a code to get out, so it is not for fire doors, emergency exit or fire egress doors. Exit path logic is unpacked in our commercial guide.
This is a non-ECP model: changing the PIN means taking the 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. It is a fiddly job the first time - full procedure in our code change guide and the Borg standard chamber section, and Borg's own steps are in the BL5000 Series Non-ECP Manual (PDF). If you expect to change codes regularly, an Easicode Pro lock changes on the door - see why ECP matters.
The outside knob can be set to free passage during business hours: enter the code and press F before you turn the knob - it 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, the F piece can be taken out of the coding chamber On The Bench (the BLSFTUMBLER puts it back). More on passage mode vs holdback mode.
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.
Offices, meeting rooms, storerooms and amenities doors where entry needs a code and exit stays free. Borg makes the BL5000 series - the 5100 is its knob keypad - for medium to heavy duty doors, with a strengthened clutch and coding chamber, and cycle tests it to 100,000 operations.
For relentless commercial traffic, step up to the Lockwood 3572DX, Borg BL7701, or Carbine CDL7200LL-HD - see what heavy duty actually means.
The keypad holds one active PIN code at a time. 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 knob keypad outside: the correct code lets the outside knob withdraw the latch, and the inside knob always turns for a free exit. There is no key override, app, fob or card on this model.
Key Features
- Knob keypad outside and a plain knob inside - free exit from inside, no code needed.
- Clutching outside knob - it turns freely without a valid code, so it cannot be forced against the latch.
- Free passage function (F button) - hold the door open during business hours; the F piece can be removed On The Bench.
- Two finishes on this listing: Satin Chrome (BL5101SC) and Satin Stainless (BL5101SS).
- Medium to heavy duty BL5000 series (the 5100 is its knob keypad) - strengthened clutch and coding chamber, cycle tested to 100,000 operations (Borg BL5000 Series Brochure).
- On The Bench code change - over 2,000 combinations (Borg BL5000 Series Brochure); code length 3 to 7 digits; digits entered in any order.
- Not fire tested - not for fire doors; the lever BL5001 is the fire tested choice.
- Fully mechanical - no batteries, no wiring, no power source.
- 60mm anti-thrust stainless steel tubular latch; a 70mm latch is available separately.
- Door thickness 35mm to 54mm on the standard fixings.
- Reversible on site for left or right hand doors.
What's in the Box
- Borg BL5101 outside knob keypad assembly (selected finish)
- Inside knob handle (selected finish)
- 60mm heavy duty anti-thrust tubular latch (12.5mm latch bolt)
- Strike plate and box keep
- 2 x spindles (80mm and 90mm)
- 4 x 16mm screws
- 2 x M4 x 40mm screws
- 2 x M4 x 50mm screws
- 2 x M4 x 60mm screws
- 2 x coded code pieces (red - spare)
- 2 x non-coded code pieces (blue - spare)
- Tweezers (for the On The Bench code change)
- Long hex wrench (Allen key)
- Handle screw rubber grommet
- Installation instructions
A 70mm backset latch (BLL500070) is available separately. No batteries or wiring are required or supplied.
Suitable Uses
- Offices, meeting rooms, storerooms, plant rooms and amenities doors where entry needs a code and exit must stay free - browse our internal door locks.
- Doors where a knob suits better than a lever - a knob keeps a lower profile on the door face in a tight space.
- Sheltered external doors - both finishes suit internal and sheltered external use, not coastal positions.
- Doors where the code rarely changes - it is changed On The Bench.
- Not for fire doors - the BL5101 is not fire tested (see the note above); the lever BL5001 is.
- Not for users with limited grip where a lever is needed - a knob is harder to turn with full hands or weak grip.
Available Finish Options
Satin Chrome
BL5101SC
PVD - internal and sheltered
Satin Stainless
BL5101SS
PVD - internal and sheltered
Both finishes are chosen on this page and share the same mechanical specification. Both suit internal and sheltered external doors - neither is for coastal or saline positions.
Borg BL5000 Series Knob and Lever Options Compared
All four are fully mechanical BL5000 series locks on a 60mm tubular latch, coded On The Bench. The differences are the handle on each face, whether the inside needs a code, and fire door use.
A back-to-back lock needs a code to get out, so the BL5151SC and BL5051 are not for fire doors, emergency exit or fire egress doors.
Accessories and Spare Parts
The BL5101 shares the BL5000 series latch and coding chamber, so these parts carry over - spare parts depth is one of the reasons the range outlasts hardware store imitations.
Spare coded (red) and non-coded (blue) code pieces ship in the box; extra code pieces and knob keypad spares can be arranged through us - contact us. Browse all tubular latches and bolts and scar and adaptor plates.
Full Specifications
Dimensions
The outside unit is the BL5100 series knob keypad; the inside unit is a plain knob handle on the same size plate.
Frequently Asked Questions
Yes. The inside knob always turns, so nobody needs the code to leave. That makes the BL5101 a single-sided lock - the code controls entry only. It is not fire tested, though, so for a fire door choose the lever BL5001.
On The Bench. Take the 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. Test the new code at least five times before refitting - the full procedure is at the bench method guide, and read the traps first.
No. It has not been fire tested, so it is not for fire door assemblies. The lever BL5001 has been tested up to 4 hours (depending on the type of doorset) in accordance with AS 1905.1-2005 - choose it for a fire door.
Not on the BL5101 - it is single-sided. The BL5151SC puts a knob keypad on one face and a lever keypad on the other, and the lighter duty BL2020SC has knob keypads on both faces. Either needs a code to get out, so neither is for fire doors, emergency exit or fire egress doors.
Yes. Units ship factory set for right-hand doors. To change, remove the rubber grommet at the base of the handle, use the included hex wrench to remove the grub screw, rotate the handle 180 degrees and refit - on the keypad and on the inside knob handle. Handing is read from the outside of the door. Background: understanding door handing in Australia.
Additional Information
Monthly: wipe the keypad, both knobs 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 lock from the door, spray the inside through the code piece holes on the reverse of the keypad with silicon-based lubricant, spray all fixings, accessories and the latch with silicon-based lubricant, then press each button and operate both knobs several times to confirm smooth operation. Full steps are in the Borg Lock Servicing Guide (PDF).
The BL5101 has not been fire tested, so it is not for fire door assemblies. For a fire door, choose the lever BL5001, which is fire tested to AS 1905.1-2005. See what is actually compliant on apartment fire doors.
The code can be set with the keypad on or off the door, but On The Bench is far easier - set it and test it five times before the lock goes on the door. Know the current code before you start, and keep the door open while you test.
Two spindles are supplied (80mm and 90mm). The general rule: door thickness + 30mm = minimum spindle length. Use the longest that fits and never cut a spindle shorter than necessary - a short spindle can disengage under a hard door slam.
A knob keeps a lower profile and suits a tight space, but it is harder to turn with full hands or limited grip. Where accessibility matters, the lever BL5001 is the better choice - and it is the fire tested one.
Warranty
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.
Download PDF Resources
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 covers this lock's On The Bench keypad; its latch fitting pages are written around the lever BL5001.
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 this lock's keypad; its latch fitting steps are written for the lever models.
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 5100 is the knob handle style on it.
Borg's two-page brochure for the BL5100 knob keypad Easicode Pro range. It covers the Easicode Pro BL5101 ECP, not this On The Bench BL5101 - use it for the look of the knob keypad only; the code change, door thickness and specifications on this page are the ones that apply.
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 knob lock with us before drilling.
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 BL5101 - FAQ, Setup and Owner's Guide
Everything below is here to help you choose, install, code and live with the BL5101 knob keypad 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?
Knob Keypad and Free Exit
Outside: press C to clear any part-pressed buttons, enter the code and turn the knob to withdraw the latch; let go and the keypad relocks. Inside: just turn the knob - no code. The digits can be pressed in any order.
A knob keeps a lower profile on the door face, which suits tight corridors and doors that open close to a wall. The trade-off is grip - a knob is harder to turn with full hands or limited grip, so where accessibility matters the lever BL5001 is the better choice.
Not on the BL5101 - it is single-sided. The BL5151SC is the back-to-back with a knob keypad on one face and a lever keypad on the other, and the lighter duty BL2020SC has knob keypads on both faces on the BL2000 platform. A back-to-back needs a code to get out, so it is not for fire doors, emergency exit or fire egress doors; see exit paths on double-sided locks.
No - it has not been fire tested, so it is not for fire doors. The lever BL5001 has been tested up to 4 hours (depending on the type of doorset) in accordance with AS 1905.1-2005. Background: fire door certification.
Codes and Code Changing
Yes. The code can be set with the keypad on or off the door, but On The Bench is far easier - set and verify it before mounting. Know the current code, work with the door open, and test five times.
Allow 20-30 minutes the first time, including removal and refitting, and 5-10 minutes once practised. 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 refit. The honest comparison across Borg's methods is at how long code changes take.
Dropping a code piece (work over a tray), losing track of which code pieces came from which slots, and refitting without testing. The rules that prevent a lockout: know the current code, work with the door open, test five times. Full trap list: bench method traps.
Red code pieces are coded (that button becomes part of the PIN), blue are uncoded. The spares let you lengthen or shorten the code - 3 to 7 digits. Extra code pieces are available from us, and the free passage F piece (BLSFTUMBLER) is sold separately - see spare code pieces explained.
Nobody is trapped inside - the inside knob always turns. From outside there is no key override, so with the door shut a forgotten code is a locksmith visit - contact us. With the keypad off the door, the code can be read from the red code pieces On The Bench.
No - one active code, no user list and 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.
Ordering and Fit
It is supplied to order rather than held as a same-day stock line. Contact us before ordering and we will confirm the dispatch time and the availability of your finish.
Both are chosen on this page and share the same specification; both suit internal and sheltered external doors. Neither is for coastal or saline positions - for a coastal door, look at the Black Marine Grade Pro variant of the lever BL5001.
The standard fixings suit 35-54mm doors. For a thicker door, contact us before ordering. The spindle rule still applies: door thickness + 30mm = minimum spindle length, and the 80mm and 90mm spindles in the box cover most standard doors.
Yes - the satin chrome BLL500070 is the 70mm latch for the BL5000 series.
Handing is read from the outside of the door and is reversible on site: remove the rubber grommet, take out the grub screw with the hex wrench, rotate the handle 180 degrees, refit and tighten - on the keypad and the inside knob handle. The handing chart is in the Non-ECP manual (PDF).
Range and Spares
The latch (BLL5000), the F piece (BLSFTUMBLER), scar plates (SPBL5001) and knob keypad spares through us - see the Accessories table.
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 relentless traffic, step up to a true heavy-duty platform such as the Borg BL7701 or the Lockwood 3572DX.
Nothing to charge, pair or update - the BL5101 runs on its coding chamber alone. If you need several user codes, an audit trail or remote management, a smart lock is the better fit; the honest comparison is at Ch 16 mechanical vs smart.
Servicing
Monthly, a light wipe of the keypad, both knobs 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 lock off the door, spray through the code piece holes on the back of the keypad and over the fixings and latch, then check every button and both knobs. The full schedule is in the Borg Servicing Guide (PDF Files tab).
Related Products, Guides and Chapters
This lock and its siblings: BL5151SC - Knob/Lever BTB - BL5001 - Lever, Fire Tested - BL5051 - Lever/Lever BTB - BL2020SC - Knob/Knob BTB, BL2000 Series
Accessories and spares: F Piece - Tube Latch 60mm - Tube Latch 70mm - Stainless Scar Plates - LB22 Weld-On Lock Box
Buyer's Guide chapters: Ch 16 Mechanical Digital Locks - Ch 16 Borg Naming Decoded - Ch 16 Code Changing Methods - Ch 10 Borg Brand Profile
Helpful blog reading: Changing Codes - The Bench Method - What Is a Mechanical Digital Lock? - Passage Mode vs Holdback Mode - Heavy Duty Commercial Mech-Digi - Why Our Range Beats Imitations
What's In The Box - Borg BL5101 (BL5101SC / BL5101SS)
- Borg BL5101 outside knob keypad assembly (selected finish)
- Inside knob handle (selected finish)
- 60mm heavy duty anti-thrust tubular latch (12.5mm latch bolt)
- Strike plate and box keep
- 2 x spindles (80mm and 90mm)
- 4 x 16mm screws
- 2 x M4 x 40mm screws
- 2 x M4 x 50mm screws
- 2 x M4 x 60mm screws
- 2 x coded code pieces (red - spare)
- 2 x non-coded code pieces (blue - spare)
- Tweezers (for the On The Bench code change)
- Long hex wrench (Allen key)
- Handle screw rubber grommet
- Installation instructions
Borg BL5101 - Dimensions
Two drawings: the BL5100 series knob keypad that goes on the outside, and the plain knob handle that goes on the inside.
Borg BL5000 Series - Product Brochure
PDF Files - Borg BL5101
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 covers this lock's On The Bench keypad; its latch fitting pages are written around the lever BL5001.
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 this lock's keypad; its latch fitting steps are written for the lever models.
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 5100 is the knob handle style on it.
Borg's two-page brochure for the BL5100 knob keypad Easicode Pro range. It covers the Easicode Pro BL5101 ECP, not this On The Bench BL5101 - use it for the look of the knob keypad only; the code change, door thickness and specifications on this page are the ones that apply.
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 knob lock with us before drilling.
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
- 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.
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.
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