ABK-3turn rim lock

The ABK-3 Turn Rim Lock is a robust, surface-mounted mechanical locking solution. It is engineered for applications requiring reliable security with distinctive three-turn key operation.

Unlike standard rim locks that fully retract the latch with a single 90-degree key rotation, this lock requires three complete key revolutions to fully retract the deadbolt. This deliberate mechanical sequence provides both enhanced security against lock manipulation and a psychological deterrent effect against unauthorized entry.

Constructed from heavy-duty zinc alloy with a hardened steel deadbolt mechanism, this ABK-3turn rim lock is specifically designed for wooden doors in residential, commercial, and agricultural applications. These include store rooms, rear entry doors, garden gates, workshops, and period property restoration.

The ABK-3turn rim lock surface-mounted configuration eliminates the need for complex door preparation or mortising. It installs directly onto the door face with included mounting hardware, making it the preferred choice for retrofit security upgrades and DIY installations.

Available in multiple finish options, this lock combines traditional aesthetic with modern anti-tamper engineering.

ABK-3turn rim lock

What Does 3-Turn Mean and Why Is It Important?

A defining characteristic is its three-turn key operation. Unlike conventional rim locks that extend the bolt with a single quarter-turn of the ABK-3turn rim lock , this lock requires the key to be rotated three full revolutions to fully deploy or retract the deadbolt.

This ABK-3turn rim lock  mechanical multiplication serves two critical security functions. First, it significantly increases the time and effort required to manipulate the lock via picking or raking techniques.

Second, the three-turn mechanism provides substantial mechanical advantage. It allows the ABK-3turn rim lock to easily overcome binding door movement caused by seasonal wood expansion or minor settlement.

Users transitioning from single-turn locks should note that this is not a quick-throw mechanism. ABK-3turn rim lock requires deliberate, continuous key rotation.

What Materials Are Used in the ABK-3 Construction?

This ABK-3turn rim lock is manufactured from a carefully selected combination of materials optimized for security, corrosion resistance, and longevity.

The ABK-3turn rim lock  case and striking plate are precision-diecast from high-grade zinc alloy. This provides excellent dimensional stability and impact resistance while remaining cost-effective.

The deadbolt assembly is fabricated from case-hardened steel. ABK-3turn rim lock is specifically treated to resist hacksaw attacks through the door gap.

The ABK-3turn rim lock  cylinder features multiple anti-drill hardened steel pins. These are strategically positioned to defeat rotary drill bit intrusion attempts.

The exterior finish is applied via multi-stage electroplating or durable powder coating. Each formulation is tested to withstand 200+ hours of ASTM B117 salt spray exposure without visible corrosion.

Is the ABK-3 Suitable for External Security Applications?

Yes. This ABK-3turn rim lock is fully rated for exterior door applications where protection against weather and forced entry is required.

The ABK-3turn rim lock case features overlapping seam construction with internal labyrinth sealing. This ABK-3turn rim lock  resists water ingress and dust infiltration.

The keyway includes a spring-loaded dust shutter that automatically closes when the key is removed. This prevents debris accumulation and offers additional resistance against lock picking tools.

The cylinder is mounted with the key entry facing downward when correctly installed. This allows rain runoff to shed naturally.

For coastal or high-humidity environments, the marine-grade satin chrome and powder-coated black finishes provide maximum corrosion resistance.

What Door Thickness and Material Are Compatible?

This ABK-3turn rim lock is designed for universal surface mounting on wooden doors ranging from 35mm to 55mm thickness.

The standard strike plate and lock case are configured for doors with a standard 50mm backset. It includes an adjustable striking plate that accommodates both flush-mount and surface-mount frame conditions.

This ABK-3turn rim lock   is specifically engineered for timber doors. It is not recommended for hollow metal doors, aluminum frames, or glass doors without appropriate wooden substructure reinforcement.

The surface-mounted nature requires no large mortise cutouts. Only clearance holes for cylinder and mounting screws are needed. This makes it ideal for installation on original heritage doors where preservation of historic fabric is paramount.

How Secure Is the ABK-3 Against Common Attack Methods?

This ABK-3turn rim lock incorporates multiple defensive engineering features against physical attack.

The cylinder features anti-drill protection. Hardened steel rotating discs and stationary pins positioned directly behind the keyway will spin or shatter rotary drill bits attempting to penetrate the plug.

The deadbolt projects 25mm from the lock case, substantially longer than standard tubular latch bolts. ABK-3turn rim lock engages a reinforced strike box with deep bolt penetration.

When fully locked, the bolt gap between door and frame is minimized to less than 3mm. This severely limits jimmy bar insertion.

The mounting screws are concealed beneath the removable cover plate when installed. This prevents direct access to fastener heads.

The lock case is secured to the door with four heavy-gauge wood screws, not the two-screw mounting common on economy rim locks.

Does the ABK-3 Include a Keying System?

Yes. This ABK-3turn rim lock is supplied with a five-pin tumbler cylinder system. It includes three precision-milled nickel-plated brass keys.

The keyway profile is a proprietary restricted section. Standard retail blank keys will not insert into the cylinder. This provides basic key control and reduces the likelihood of unauthorized key duplication.

The lock can be keyed-alike with multiple units upon special order. This allows a single key to operate all ABK-3 locks on a property.

For commercial applications, it is compatible with most standard rim lock cylinder replacements should grand master keying be required.

Users should not attempt to rekey this cylinder without proper locksmith tooling and training.

What Installation Tools and Skills Are Required?

This ABK-3turn rim lock is designed for straightforward DIY installation with basic woodworking tools.

Required equipment includes a tape measure, pencil, combination square, electric drill, 2mm pilot bit, 5mm clearance bit, 25mm spade bit or hole saw, and Phillips screwdriver.

The installation template is printed on the product packaging interior. It provides precise marking locations for cylinder bore and mounting screw positions.

Typical installation time for experienced DIY users is 20 to 30 minutes. The lock includes all necessary mounting hardware.

Professional locksmith installation is recommended for period doors with non-standard dimensions or unusual stile widths.

What Maintenance Does the ABK-3 Require?

This ABK-3turn rim lock is a precision mechanical assembly requiring periodic maintenance for optimal performance and longevity.

The key cylinder should be lubricated annually with a dry-film PTFE lubricant specifically formulated for locks. Do not use petroleum-based oils, graphite powder, or WD-40. These attract dust and will eventually gum the pin tumblers.

The deadbolt mechanism and three-turn drive train are pre-lubricated at the factory with high-pressure lithium grease. They should not require additional lubrication during the product lifespan.

The external case may be cleaned with a soft, damp microfiber cloth. Abrasive cleaners will damage plated finishes.

In coastal or industrial environments, monthly wipe-down of the exterior is recommended to remove salt or chemical deposits.

ABK-3turn rim lock available in Mombasa, Kwale, Kilifi, Lamu, Mandera, Marsabit, Isiolo, Meru, Embu, Kitui, Machakos, Makueni, Nyandarua,

Nyeri, Kirinyaga, Murang’a, Kiambu, Turkana, Samburu, Trans Nzoia, Uasin, Gishu, Elgeyo Marakwet, Nandi, Baringo,

Laikipia, Nakuru, Narok, Kajiado, Kericho, Bomet, Kakamega, Vihiga, Bungoma, Busia, Siaya, Kisumu, Homa Bay, Migori, Kisii, Nyamira, Nairobi.

In Nairobi you can find them at: Westlands, Dagoretti,  Lang’ata, Starehe, Kamukunji, Embakasi, and Kasarani, Kibera, Mathare,

Eastleigh, Karen, Lavington, Westlands, Parklands, Runda, South C, South, Ngong Road

In Mombasa you can find us at : Nyali, Mwembe Tayari, Majengo, Likoni ,Bamburi, Miritini