Lockmaster Single Spindle Slave Gearbox – 35mm Backset

Secure your French doors with the Lockmaster Single Spindle Slave Gearbox, designed specifically for Lockmaster and Milamaster door lock mechanisms. This slave-type gearbox is used on the secondary door of a pair of French doors and does not include a latch or deadbolt. If your door lock is malfunctioning, the gearbox is often the root cause. Replacing it is straightforward—just remove a few screws.

Cost-Effective Door Lock Repair

Replacing the gearbox is an affordable alternative to changing the entire multipoint door lock strip. It ensures your door remains secure without the additional cost and hassle of a full lock replacement.

Key Features:

• Designed for Lockmaster/Milamaster Locks: Compatible with 35mm backset and 92mm PZ centres.
• Slave Gearbox Design: Specifically for secondary doors in French door pairs, with no latch or deadbolt.
• Easy Installation: Quick and simple to install using existing screws.
• Common Fault Fix: Often the primary cause of door lock issues.
• Single Spindle Design: Ideal for lever/lever handle operations.

Technical Specifications:

• Backset: 35mm
• Centres (PZ Measurement): 92mm
• Compatibility: Designed to fit Lockmaster/Milamaster single spindle slave gearboxes—please verify with product images before purchasing.
• Included: A detailed technical diagram is provided to assist with installation.

Note: Before purchasing, ensure your current gearbox matches the images provided to guarantee proper compatibility.