Cego Surelock Gearbox Door Lock Centre Case Twin Spindle 35mm Backset

Cego Surelock 35mm Replacement Multipoint Gearbox – 70/92mm PZ, Twin Spindle

The Perfect Replacement for Discontinued Cego, Zenith & Bowater Multipoint Lock Systems

Cego Surelock 35mm Replacement Multipoint Gearbox offers a reliable solution for homeowners facing the challenge of replacing obsolete lock mechanisms on older uPVC doors. Engineered specifically to replace the now-discontinued CEGO/05002-series lockcases, this versatile gearbox brings your aging Zenith, Bowater, or Staybrite door system back to full working order.

Featuring dual PZ centres at 70mm and 92mm positions with twin 8mm spindles, this replacement gearbox provides the flexibility needed for both lever/lever and lever/pad handle configurations. The reversible latch mechanism ensures compatibility with both left and right-handed doors, whilst the robust centre case design delivers dependable latch and deadbolt operation for years of trouble-free service.

Key Benefits:

• Direct Replacement for Obsolete Systems – Specifically designed to replace the discontinued CEGO/05002-series lockcases commonly found on Zenith, Bowater, and Staybrite uPVC door systems, saving you the expense and disruption of replacing your entire multipoint strip.
• Dual PZ Centre Compatibility – Features both 70mm and 92mm PZ centres with the top 92mm follower originally designed for offset lever/pad configurations, whilst the 70mm centre now accommodates modern lever/lever through-handles as offset 92/70 handles have been largely discontinued.
• Twin Spindle Versatility – Equipped with dual 8mm spindles enabling both lever/lever and lever/pad operation, providing flexibility for your preferred handle configuration and ensuring compatibility with various existing setups on older Cego door systems.
• Reversible for Any Door Orientation – Non-handed design with reversible latch mechanism allows straightforward adaptation for both left-handed and right-handed doors, eliminating the need to order specific versions and simplifying the replacement process.
• Robust Latch & Deadbolt Mechanism – Features a reliable centre case design with 90mm latch-to-deadbolt spacing, 20mm deadbolt throw, and 25mm deadbolt width, delivering the secure locking performance your home deserves whilst maintaining smooth, consistent operation.
• Cost-Effective Lock Case Solution – Screw-on lock case design fits directly onto your existing Cego multipoint strip using self-tapping screws through the unthreaded case holes, avoiding the expense of replacing the entire locking strip assembly.
• Proven 35mm Backset Standard – The 35mm backset measurement is the standard specification for older Cego uPVC doors, ensuring this replacement gearbox aligns perfectly with your existing door preparation and keeps cylinder positioning accurate.
• Compatible with Standard Euro Cylinders – Accepts standard euro profile cylinders (not supplied), allowing you to choose your preferred security level and key system whilst maintaining compatibility with widely available cylinder options.

Product Specifications:

• Brand: Cego
• Backset: 35mm (standard for older Cego uPVC doors)
• PZ Centres: 70mm & 92mm (dual configuration with top 92mm follower)
• Spindle Type: Twin (double) 8mm spindles
• Lock Operation: Lever/Lever or Lever/Pad
• Latch to Deadbolt Centres: 90mm
• Deadbolt Throw: 20mm
• Deadbolt Width: 25mm
• Deadbolt Thickness: 5mm
• Cylinder Type: Euro profile (not supplied)
• Handing: Non-handed; latch reversible for left or right-handed doors
• Case Design: Screw-on lock case with unthreaded holes (use self-tapping screws)
• Suitable For: Cego, Surelock, Zenith Staybrite, Bowater door systems
• Compatibility: Replaces obsolete CEGO/05002-series lockcases

Important Compatibility Note: This gearbox can often replace the discontinued Zenith Staybrite hook-type centre case (this version features a deadbolt instead). Provided the linkage positions match your existing system, it will generally fit, though you may need to lightly file the top latch window in your existing faceplate to accommodate the slightly wider latch. Some Staybrite variants used different connectors and are not interchangeable—always verify linkage points before ordering.

Dimensions:

• Item Height: 234mm
• Item Width: 15mm
• Item Depth: 48mm
• Item Weight: 598g

Pro Tips:

Pro Tip: When replacing your old Cego gearbox, pay careful attention to the latch reversal process if needed. To reverse the latch for opposite-handed doors, you must remove the correct side panel (the one on the latch side), take out the latch plate and spring, turn the latch over, then replace the spring and plate. Getting this right ensures your door operates smoothly from day one. Also, when fitting the case to your existing strip, reuse your original self-tapping screws—the case holes are intentionally unthreaded to work with these screws. Before ordering, take a photo of your existing linkage connection points and compare them carefully, as some Staybrite variants used different connector positions that aren't interchangeable with this gearbox.

What's in the Pack:

• 1 × Cego Surelock 35mm Multipoint Gearbox

Frequently Asked Questions:

Will this gearbox fit my old Zenith Staybrite door that currently has a hook lock rather than a deadbolt?

Yes, in most cases this gearbox can replace the discontinued Zenith Staybrite hook-type centre case, even though this version uses a deadbolt mechanism instead. The key factor is whether the linkage connection points match your existing system—if they align correctly, the gearbox will function properly. However, you may find that the top latch is slightly wider than your original, which could require light filing of the existing hole in your door's faceplate to accommodate it. We strongly recommend checking your linkage points and measuring your current gearbox before ordering to ensure compatibility.

My door has offset 92/70mm handles—will this gearbox work with them?

This gearbox is designed with both 92mm and 70mm PZ centres specifically to accommodate various handle configurations on older Cego systems. The top 92mm follower was originally intended for offset lever/pad setups, and whilst offset 92/70mm handles have largely been discontinued by manufacturers, this dual-centre design ensures compatibility with your existing arrangement. The 70mm centre is now the standard position for modern lever/lever through-handles, so you'll have flexibility if you decide to upgrade your handles in the future.

Do I need to replace my entire multipoint locking strip, or just this gearbox?

One of the major advantages of this replacement gearbox is that it's designed as a screw-on lock case that fits directly onto your existing Cego multipoint strip. You won't need to replace the entire strip assembly, which saves considerable expense and reduces installation complexity. Simply attach this gearbox to your existing strip using self-tapping screws through the unthreaded case holes (reuse your original screws). This makes it a highly cost-effective solution for bringing your aging door lock back to full working order without the disruption of a complete strip replacement.

Is this gearbox suitable for both left-handed and right-handed doors?

Absolutely. This Cego gearbox features a non-handed design with a reversible latch mechanism, making it suitable for doors that open either way. If you need to reverse the latch orientation, simply open the correct side panel (the one covering the latch mechanism), remove the latch plate and spring, turn the latch over, then replace the spring and plate. This straightforward reversal process means you don't need to order different versions for different door orientations, and you can adapt the gearbox to suit your specific installation requirements on site.

What size cylinder do I need, and is one included with this gearbox?

This gearbox accepts standard euro profile cylinders, which are not included with the purchase. The 35mm backset means you'll need to measure your door thickness and choose an appropriately sized euro cylinder—typically this involves measuring from the centre of the cylinder hole to each face of the door. Most suppliers offer euro cylinders in various lengths (such as 35/35mm, 40/40mm, or offset sizes like 35/45mm) to suit different door thicknesses. This allows you to select your preferred security level and key system independently, ensuring you get exactly the cylinder specification and security rating that meets your needs.

Why Choose This Cego Surelock Gearbox?

When your older Cego, Zenith, Bowater, or Staybrite door lock fails, finding the right replacement can feel like searching for a needle in a haystack—especially when original parts have been discontinued for years. This Cego Surelock 35mm multipoint gearbox has been engineered specifically to solve this frustrating problem, offering a direct replacement solution that restores your door's security and functionality without the expense of replacing your entire locking system. With its versatile dual PZ centres, twin spindle operation, and reversible latch design, this gearbox delivers the reliability and peace of mind your home deserves, backed by straightforward installation onto your existing multipoint strip. Don't let an obsolete lock mechanism compromise your home security—choose this proven replacement gearbox and enjoy years of smooth, dependable operation.