uPVC Door Gearbox Replacements | Multipoint Lock Gearboxes | Home Secure

17 products

Explore our specialist range of uPVC door gearboxes, designed for smooth operation, long-term durability, and simple replacement.
Whether your existing lock mechanism has jammed, stiffened, or failed entirely, our collection includes compatible uPVC gearbox replacements for leading door systems and multipoint locks.

🔩 What Is a uPVC Door Gearbox?

A uPVC door gearbox is the central locking mechanism that operates the multipoint lock on your door. When you turn the key or handle, the gearbox activates the hooks, rollers, or bolts that secure your door into the frame. Over time, this part can wear down or seize — replacing it restores smooth locking performance without the need to change the entire mechanism.

Key Features:

Wide compatibility with major brands including ERA, GU (Old & New Style), Technal (commercial aluminium), Fuhr, Maco, Fullex, Lockmaster, Mila, and more.
Precise fit and value, saving both time and money versus full multipoint lock replacement options.
Non‑handed design, fitting both left- and right-hand doors for flexible installation.

Spotlight Product Highlights:

ERA Door Lock Centre Case Gearbox – Available in 35 mm/45 mm backset with 92 mm PZ. Compatible with ERA, Saracen, Surelock, Laird, and Fab & Fix. Offers both single and split spindle configurations.
GU New Style Door Lock Centre Case Gearbox – Comes in 28 mm or 35 mm backset, 92 mm PZ, single or split spindle options. Note: Not compatible with old-style GU locks.
Technal Door Lock Mechanism Gearbox – Engineered for aluminium doors typically found in commercial or apartment block settings. Features a 33 mm backset, 92 mm PZ, 240 mm case height, and 305 mm overall length.
Fuhr Door Lock Centre Case Gearbox – Ideal for uPVC doors; non-handed, offers single or split spindle styles, and includes detailed dimensions for accurate fitment.
Maco Old Style Door Lock Centre Case Gearbox – Compatible with Maco multipoint systems; offered in 28 mm or 35 mm backset with a 92 mm PZ, non-handed, single spindle.
GU Old Type Door Lock Centre Case 30 mm Single Spindle – Designed to replace older GU gearbox units using a 30 mm backset and 92 mm PZ.

Benefits & Technical Advantages:

Cost‑effective replacements: Just the gearbox — no need to buy a new locking strip or multipoint system.
Accurate matching: Select your replacement based on essential measurements like backset, PZ distance, and spindle type to ensure seamless installation.
Reduced waste: Opting for the centre case is both economical and environmentally friendly.
Versatile usage: Designed to match a variety of locking systems and operational requirements through single or split spindle options.