Home improvement replacement parts can restore GU Old style door locks to working order and secure latching. That avoids a full lock swap and brings practical peace of mind for busy households. Is SHIELD HARDWARE Replacement Door Lock Gearbox the right match for your make and model?
⚡ At a Glance
- • Fit and Compatibility: Compatible replacement for GU Old style door locks with a 35mm backset, but only where the make and model match exactly
- • Best for: DIY homeowners and locksmiths needing a direct gearbox swap without replacing the whole lock
- • Not ideal for: Doors where the original gearbox make or model cannot be confirmed
Compatible with GU Old style locks that use a 35mm backset. Non-handed centre case with a single spindle, rotatable latch and screw-reuse installation for straightforward replacement.
Easy Replacement – With screw-reuse installation
Centre case aligns with common GU Old style mounting holes so existing screws can be removed and reused to secure the replacement. Minimal changes to the door frame are required during swap-out.
Fitting usually requires simple hand tools and preserves original fixings, making it a practical option for a quick repair without extra drilling.
Universal Handing – With non-handed centre case and rotatable latch
Non-handed centre case supports both left and right handed doors, and latch orientation can be changed by rotating the latch before installation. No separate left/right variants are necessary.
Single part covers both door orientations, reducing ordering errors and simplifying spare parts stock for tradespeople and DIYers.
Restores Lock Function – Thanks to compatibility with GU Old style units
Designed as a compatible replacement for GU Old style gearboxes with a 35mm backset, compatibility depends on matching the original make and model exactly. The single spindle centre case replicates the form used in many original units.
Replacing a faulty centre case can return a non-functioning lock to reliable service without replacing the whole locking assembly.
✨ The 4 Key Reasons for SHIELD HARDWARE Replacement Door Lock Gearbox
- Quick to fit – Restores lock operation typically within a single maintenance visit
- Non-handed centre case – Fits both left and right doors without extra parts
- Reuses existing screws – Avoids drilling and new fixings, keeping original mounting intact
- Restores reliable function – Proven by user feedback as a dependable repair solution
📋 Technical Details at a Glance
- Category: Home Improvement - Replacement Door Lock Gearbox
- Brand: SHIELD HARDWARE
- Compatible with: GU Old style door locks (ensure exact same make and model before ordering)
- Backset: 35mm
- Handing: Non-handed, fits left and right handed doors
❓ Frequently Asked Questions
Q: Is this gearbox compatible with GU Old style locks?
A: Compatibility applies to GU Old style door locks with a 35mm backset; confirm the original make and model matches exactly because different gearboxes are not interchangeable.
Q: Can it be fitted to left and right handed doors?
A: Yes, the centre case is non-handed and the latch can be rotated before installation to suit left or right handed doors.
Q: Do I need new screws when fitting?
A: New screws are not usually required, as the replacement is designed to be fitted by removing and reusing the screws from the existing gearbox.
🏆 Our Verdict
Suitable for DIYers and tradespeople who need a direct gearbox swap for GU Old style locks with a 35mm backset. Non-handed centre case, rotatable latch and screw-reuse installation make for a low-effort repair that restores lock function. Offers practical long-term value when an exact make and model match avoids a full lock replacement.
