Borg BL3430 Mechanical Digital Gate Lock - Back-to-Back - Key Override & Code Lockout - Marine Grade - Black

Borg BL3430DKOGATE Mechanical Digital Gate Lock - Back-to-Back - Double Key Override - Marine Grade - Black

At A Glance

At A Glance

DISPATCHSame Day Before 11am

LOCK TYPEMechanical Digital Gate Lock

FINISHBlack Powder Coat

IN THE BOXLock, Fixings, Code Change Kit

WARRANTY12 Months

ACCESSPIN Code + Key Override

KEYPADSBack-to-Back, Code Both Sides

KEY OVERRIDEDouble Key Override (DKO)

KEY LOCKDOWNYes - Key Locks Out the Code

EURO CYLINDERNot Supplied - Order Separately

CODE CHANGEOn The Bench

COMBINATIONSOver 8,000

CODES STOREDSingle PIN Code

POWERFully Mechanical, No Batteries

MARINE GRADEMarine Grade Keypads

SALT SPRAY TESTED1,000 Hours

LEVERSBoth Sides, Free-Turning

GATE PULLLever Suits Heavy/Outward Gates

FIXINGForend, No Mortice Cutting

GATE POSTS30-60mm Square

WIDER POSTSLatch Extension Available

LATCH PROJECTION65-80mm, 20mm Withdrawal

HANDINGReversible On Site

ANTI-CLIMBAnti-Climb Housing

EGRESSCode Needed to Exit

SUITABLE FORTwo-Way Gates With Key Lockdown

NOT HIGH TRAFFICLight-Medium Use

FIRE DOORSNot Suitable

POOL GATESNot for Pool Barriers

RANGE10-Model Gate Lock Family

SPARESLatches, Strikes, Post Kits

MAINTENANCESilicon Lubricant, Not WD-40

WANT CHEAPER?See BL3175GATEK - Plain Key Override

WANT HIGHER SPECS?More Expensive - See BL3430DKOMGPROECP - Easicode Pro

UNLOCK WITH

PIN Code (Both Sides)Key Override

The Borg BL3430DKOGATE is a fully mechanical back-to-back keypad gate lock from Borg's purpose-built gate lock family - it clamps to the face of a metal box-section gate post with no mortice cutting, carries a full keypad and lever handle on both sides of the gate, and adds a euro cylinder Double Key Override (DKO) with a code lockout function. A lever on each face makes it genuinely pull-friendly: heavy and outward-opening gates are easier to operate than with a knob, and the lever suits frail hands.

The Double Key Override does two jobs. Turned one way, the key opens the gate without a code. Turned further, it deadlocks the latch bolt and locks both keypads out entirely - the correct code will not open the gate until the key releases it. That gives a supervisor, body corporate manager, or facility keyholder the ability to shut a gate down completely at the end of the day, regardless of who knows the code. The euro cylinder itself is not supplied and is ordered separately.

There are no batteries, no wiring, and nothing to charge - the keypads, latch and key override are entirely mechanical, and the code is changed On The Bench, with the lock off the gate. The marine grade keypads are salt spray tested to 1,000 hours, the spring-loaded latch bolt adjusts from 65mm to 80mm of projection with 20mm of bolt withdrawal, and the lever is reversible on site to suit either hand of gate. Browse the full Digital Mechanical Locks range for every battery-free keypad lock we stock.

Estimated Dispatch
Usually ships same day if ordered before 11am AEST (excludes weekends and Queensland public holidays).

Marine Grade Keypads - Salt Spray Tested to 1,000 Hours
The keypads are marine grade quality, salt spray tested to 1,000 hours, with the housing finished in black powder coat. The 1,000 hours is a laboratory cabinet result (the finish held up that long in continuous salt fog), not a promise of service life on the coast. For severe, front-line coastal exposure, the step-up BL3430DKOMGPROECP carries Borg's full Marine Grade Pro external coating across the lock - the grades and the test are unpacked in MG Pro and ECP explained.

Code Change is On The Bench - Lock Removal Required
This is a standard-chamber Borg lock: changing the PIN means taking the lock off the gate and rearranging the red (coded) and blue (uncoded) code pieces at a bench with the supplied tweezers, on each keypad unit. It is fiddly but entirely doable - the process is covered step by step in the bench method and Borg standard chambers. If you expect to change the code with any regularity - even once a year - the Easicode Pro BL3430DKOMGPROECP - this same lock with on-gate code changes and the Double Key Override - changes codes on the gate in a couple of minutes.

Back-to-Back Keypads - Code Required from Both Sides
Both faces of the gate carry a full keypad and lever operating on the same PIN code, so the gate cannot be opened from either side without it. On a gate this matters more than on a door: a single-sided gate lock can often be defeated by simply reaching over the gate to the free inside handle. Our guide to double-sided gate locks covers exactly why back-to-back is the right call on most secure gates.

Double Key Override (DKO) - Key Access Plus Code Lockout
A euro profile cylinder fits into the lock body and gives the keyholder two functions: (1) emergency key access without the code, and (2) a code lockout - the key deadlocks the latch bolt and disables both keypads, so no code will open the gate until the key releases it. The euro cylinder and keys are not supplied - order a standard euro profile cylinder in the correct length for your gate post from our cylinders and barrels range or through your locksmith.

Code Required to Exit - No Free Egress, Not for Fire or Egress Doors, Not for Pool Barrier Gates
The inside keypad requires the correct PIN before the lever will operate, and the key lockout can disable code entry entirely. That makes this lock unsuitable for any fire door, required exit path, or emergency egress route - see why exit paths need free egress. It is also not suitable for pool safety barrier gates, where a code-to-exit lock conflicts with the barrier's compliance requirements - the pool barrier gate rules explain what is and is not allowed. Confirm compliance with your certifier before installing on any regulated gate or door.

Fully Mechanical - No Batteries, Ever
There is no power source, no wiring, and no battery to go flat on a rainy night. The keypads, latch and key override are all purely mechanical - one of the biggest practical advantages of a mechanical digital lock on an outdoor gate.

Single PIN Code Only
Like all mechanical digital locks, this lock holds one active code at a time - everyone who uses the gate shares it, and there is no audit trail of who came and went. Since a code change on this model is done On The Bench, plan your code-sharing discipline up front - or step up to the ECP sibling if you expect frequent rotation. See the limitations of mechanical digital locks.

Light to Medium Duty
This gate lock is built for light to medium traffic - residential gates, strata side gates, plant rooms, and service enclosures where a manageable number of people come and go each day. The forend fixing clamps to a hollow box-section post, which is a genuine structural consideration: it is the right method for gates, but it is not a commercial heavy-duty door lock.

Not for High-Traffic Commercial Doorways
For a busy commercial entrance with constant daily cycles, choose a heavy-duty rated mechanical digital lock instead - the Borg BL7701 heavy duty or the dual-keypad Carbine CDL7200LL-KDSC-HD. Our guide to what heavy duty actually means explains cycle ratings and where the line sits.

Codes Rotating Often, or Severe Coastal Site? Consider the MG Pro ECP Version
The BL3430DKOMGPROECP is this exact lock - same back-to-back keypads, same Double Key Override - with two upgrades: Easicode Pro on-gate code changes (no On The Bench code change) and the full Marine Grade Pro external coating. If either matters on your site, it is worth the step up.

Key Features

• Back-to-back keypads - the same PIN code is required to enter and to exit the gate.
• Lever handle on both sides - designed for pulling a heavy or outward-opening gate closed, and easier than a knob for frail users.
• Double Key Override (DKO) via euro cylinder - manual key access independent of the code, plus a code lockout that deadlocks the latch bolt and disables both keypads until the key releases it. Cylinder not supplied.
• Marine grade keypads, salt spray tested to 1,000 hours; black powder coat housing.
• Free-turning levers - each lever spins without operating the latch until the correct code is entered on that side.
• Over 8,000 code combinations; the code is changed On The Bench by rearranging the code pieces.
• Forend fixing system - through-bolts to the face of the gate post with two telescopic fixings, no mortice cutting or edge drilling.
• Anti-climb housing design.
• Spring-loaded latch bolt, adjustable from 65mm to 80mm projection via the included hex key, with 20mm bolt withdrawal.
• Security fixings included.
• Suits square gate posts from 30mm to 60mm as standard; the 50mm latch extension (sold separately) takes it to posts up to 120mm.
• Fully mechanical - no batteries, no wiring, no power.
• Easily reversible on site to suit either hand of gate.
• Browse all Digital Mechanical Locks.

Forend Fixing System - How the Lock Mounts

Unlike a door lock, the BL3430 never needs a mortice pocket. The lock body sits on the face of the gate post and two telescopic through-bolt fixings pass right through the post, clamping the unit firmly from both sides - a front collar and sleeve assembly on the keypad side, and a rear collar fitted from the post's rear side. Standard fixings suit square posts from 30mm to 60mm. If your post sits outside that range, measure before ordering - our guide to measuring the gate stile and the forend fixing option walk through it, and the accessories table below lists the latch extensions and round post kit.

Exploded view of the forend fixing method: through bolts pass through the gate post and secure the lock unit firmly, with the rear collar fitted from the post's rear side.

Access Methods

This is a mechanical digital lock with a keypad and lever on both faces plus a Double Key Override: the correct PIN opens the gate from either side, and the key opens it regardless of the code - or deadlocks the latch and locks both keypads out. There is no free inside handle, and no app, fob or card on this model.

Method	Available	Notes
PIN Code	Yes - both sides	Full keypad on both faces - one shared code, over 8,000 combinations, On The Bench code change
Key Override	Yes - cylinder not supplied	Double Key Override - the key opens the gate independent of the code, and can also deadlock the latch and disable both keypads (code lockout). Euro profile cylinder and keys ordered separately.

What's in the Box

2x pins, 2x sleeves, tweezers x1, hex key x1, 2x through-bolt fixing screws, forend bracket x1, code piece set x4, Borg 3000 Series Lock x1.

Not in the box: the euro profile cylinder and keys for the Double Key Override. Order a standard euro profile cylinder separately in the correct length for your gate post - see the cylinders and barrels range.

Suitable Uses

• Secure external gates where the code must work both ways - back-to-back keypads defeat the reach-over trick that undoes single-sided gate locks.
• Heavy or outward-opening gates - the lever handle on both sides is designed for pulling a gate closed, and suits frail users who find a knob difficult.
• Coastal and outdoor gates within the marine grade keypads' capability - see all locks rated for an external gate exposed to rain; for severe front-line salt exposure, step up to the MG Pro sibling.
• Plant rooms, pump enclosures, and restricted-access service gates where a supervisor needs key-based lockdown (DKO) and codes rotate rarely.
• Strata, body corporate, and managed-property side gates with stable codes - the manager's key shuts the gate down completely when needed.
• Not suitable for: pool safety barrier gates (see the canonical pool barrier treatment), fire doors, or any required exit path - the code-to-exit design and key lockout conflict with free-egress requirements.

Available Finish Options

• 
  Black Powder Coat
  (This Product)
  STK BL3430DKOGATE

Finish selection does not affect functionality, compliance, or performance. The entire BL3100-BL3400 gate lock family is supplied in black only.

Borg BL3100-BL3400 Gate Lock Series - Full Product Family

All ten models are purpose-built forend-fixing gate locks for metal box-section gate frames - fully mechanical, no batteries, black finish, 65-80mm adjustable latch. They differ in keypad configuration, marine grade tier, code change method, and key override.

Marine Grade models are finished in black powder coat with marine grade keypads (salt spray tested to 1,000 hours); MG Pro models carry Borg's Marine Grade Pro external coating. Easicode Pro (ECP) models change codes on the gate; the other models change codes On The Bench, with the lock off the gate. DKO = Double Key Override: a euro cylinder key override that can also deadlock the latch and lock out the code, while the BL3175GATEK's key override is a plain emergency-access override; the euro cylinder is not supplied on any key override model in this table. For help decoding Borg's model naming, see the Borg naming guide.

Accessories and Spare Parts

Every catalogued accessory and spare for the standard-chamber Borg gate locks is listed below - one of the reasons this range outlasts hardware-store keypad locks is that the parts that wear are all available as spares.

Spare red and blue code pieces are supplied in the box for lengthening or shortening the code. No spare keypad is catalogued for the BL3100-BL3400 gate lock series - if a keypad is damaged in service, contact us and we will handle it under warranty or source a resolution with Borg directly. The Easicode latch extension (BLGATELATCHNEW) and the Easicode change key belong to the ECP models, not this On The Bench version. The euro profile cylinder for the Double Key Override is not supplied - browse cylinders and barrels or ask us to match one to your gate post width.

Full Specifications

Dimensions

Perspective view - keypad and lever body dimensions, fixing hole centres, and the 65-80mm adjustable latch projection

Front profile - 90mm wide, 105mm deep, latch projection 65-80mm adjustable

Back-to-back side profile - both keypad units, 176mm tall, 120mm wide

Latchbolt projection adjusts 65-80mm with 20mm bolt withdrawal. Standard fixing suits 30-60mm square posts; the 50mm latch extension takes coverage to 120mm. See the full-width drawings in the Dimensions tab. Not sure your gate stile will take a lock at all? Start with how to measure a gate stile.

Frequently Asked Questions

How does the forend fixing system work - do I need to cut a mortice?
No mortice, no edge drilling. The lock body sits on the face of the gate post and the two telescopic fixing screws pass right through the post, clamping the unit firmly from both sides. The spring-loaded latchbolt projects from the lock body into a strike on the opposite post or frame, and its projection adjusts from 65mm to 80mm with the included hex key. This is exactly the fixing method our narrow gate post guide recommends when a mortice lock physically will not fit the stile.

How do I change the code on this model?
On The Bench, not on the gate. The lock comes off the gate, the coding chamber is opened, and the red (coded) and blue (uncoded) code pieces are rearranged with the supplied tweezers to set the new digits - then reassemble, test the new code several times, and refit. It is a careful 20-30 minute job the first time. The full procedure is in the bench method and Borg standard chambers. If that sounds like a chore you will face often, the Easicode Pro BL3430DKOMGPROECP changes codes on the gate in minutes and keeps the Double Key Override.

Can I use this lock on a pool gate?
No - not on a pool safety barrier gate. This lock requires a code to exit and can be key-locked out entirely, which conflicts with pool barrier compliance requirements. Pool barrier gates need a compliant self-closing, self-latching arrangement, and the rules around what locks are permitted are specific - read the canonical pool barrier gate treatment and why keypad locks and pool gates need care, and confirm any pool gate setup with a licensed pool safety inspector. For pool equipment enclosures and plant gates that are not part of the safety barrier itself, this lock is fine.

What exactly does the Double Key Override (DKO) do?
Two things. First, it is a conventional key override: turn the key and the gate opens without a code. Second, it is a code lockout: turn the key further and the latch bolt deadlocks while both keypads are disabled - the correct code will not open the gate until the key releases it. That gives an authorised keyholder full lockdown control over the gate. The euro profile cylinder is not supplied; source one in the correct length for your gate post from our cylinders range or through your locksmith.

Do I really have to enter the code to get out?
Yes - both keypads run the same code and the inside lever will not operate without it. That is the point of back-to-back on a gate: a single-sided gate lock can often be defeated by reaching over the top to the free inside handle. If you want code-in but free-handle-out instead, the single-sided BL3400GATE is the same lock without the inside keypad, and the BL3400DKOMGPROECP pairs a single keypad with the same Double Key Override (plus Easicode Pro). Never fit a code-to-exit lock on a required exit path - see exit paths explained.

Additional Information

Euro cylinder sourcing: the Double Key Override needs a standard euro profile cylinder, ordered separately in the correct length for your gate post width. Measure the assembled post-plus-lock depth before ordering, or ask us to match one - a cylinder that is too short will not engage and one that protrudes invites attack.

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 lock from the gate, 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. Marine grade keypads resist salt attack; they do not exempt the lock from this care. Full steps are in the Borg Lock Servicing Guide (PDF).

Plan the first code change: do it On The Bench on both keypads before the lock ever goes on the gate - it teaches you the coding chamber layout while everything is clean and well-lit, and confirms the spare code pieces are all there. Keep the tweezers with your service kit, and if you need spare code pieces or change parts later, see code change spares explained.

Why back-to-back matters on gates: most gates can be reached over. A single-sided lock with a free inside handle secures nothing against anyone tall enough to reach the far side - the single-sided problem explained. Back-to-back closes that hole, at the cost of code-to-exit - a trade you should make deliberately.

One code, shared by everyone: plan how the code is shared and how rarely it needs to change - on this model a change is done On The Bench, so it suits gates where the user group is stable. The DKO key gives management a lockdown lever the code holders cannot bypass. If per-user codes or an audit trail are must-haves, you are shopping for an electronic lock, not a mechanical one - see the limitations rundown.

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.

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.

Returns & Warranty | Borg Locks Australia Warranty Statement (PDF)

Download PDF Resources

Borg BL3400 Series Leaflet (PDF)
One-page leaflet for the standard (non-ECP) 3400 and 3430 gate locks in Black Powder Coat, including the key override versions - lever handle design, the 30-60mm post range, latch adjustment, fixings and the dimensioned drawings - the source document for this lock.

Borg BL3100-BL3400 Series Instructions (PDF)
Borg's three-page parts list, installation and handing guide for the BL3100-BL3400 gate locks - establishing the hand of the gate, latch projection and position adjustment, and the On The Bench code changing procedure.

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.