Inline Window Gearbox – uPVC Multipoint Lock Mechanisms | Home Secure Shop

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Ensure smooth, secure operation for your uPVC, timber, or aluminium windows with our reliable Inline Gearbox & Window Lock Mechanisms collection. These gearboxes are the heart of multipoint locking systems, translating handle movement into the precise activation of locking cams, shootbolts, and more.

Key Features:

Central inline design (Flush-mounted): The gearbox sits centrally beneath the faceplate, ensuring compatibility with most standard espag handles across left- and right-handed windows.
Wide compatibility: Available in common 20 mm and 22 mm backsets for seamless integration.
Variety of locking styles & cam types: Whether you need mushroom cams, shootbolt, or roller mechanisms, we have robust options to restore your window’s functionality.
DIY-friendly replacements: Often the easiest fix for jammed or stuck uPVC windows—swap the gearbox to regain smooth, secure locking.

Why Choose Inline Gearboxes?

Seamless performance: Replace worn or faulty gearboxes to restore smooth handle movement and reliable locking.
Universal fit: Choose based on backset and cam style—most inline units follow standard screw hole spacing (43 mm), making them compatible across brands.
Built to last: Crafted from durable materials with precision engineering for long-term use and enhanced window security.

Need Help Selecting?

If you're unsure which gearbox fits your window, check out our Handle & Gearbox measuring guide or get in touch—our experts can assist with pinpointing the right replacement.

Showing 1 - 4 of 4 products