GU Old Style Gearbox for Multipoint Door Lock 45mm Backset 92 PZ

GU Old Style Gearbox 45mm Backset 92 PZ - Multipoint Lock Replacement Centre Case

The professional GU old style gearbox 45mm replacement that restores your multipoint lock for a fraction of the cost.

This GU old style gearbox 45mm offers the cost-effective solution to one of the most common door lock failures in uPVC and composite doors. When your multipoint door lock stops working, it's typically the centre gearbox that has failed—not the entire mechanism. This quality GU old style gearbox 45mm backset allows you to repair your GU Old Style (Europa) multipoint lock quickly and affordably, restoring full door security without the expense of replacing the complete lock strip. Designed with 92mm PZ centres, this gearbox features a single 8mm spindle for lift-lever operation and suits both left and right-handed doors.

Manufactured from durable zinc-plated metal components, this GU old style gearbox 45mm centre case replacement is engineered to match the original GU Old Style lock mechanism perfectly. The unit includes the essential spacer bar required for the 45mm backset dimension, with extended latch and deadbolt components specifically designed for this wider backset configuration. Whether you're a homeowner tackling a DIY door lock repair or a professional locksmith, this GU old style gearbox 45mm delivers reliable performance and straightforward installation for uPVC doors, composite doors, and timber doors.

Key Benefits:

• Professional GU Old Style Gearbox 45mm Replacement – Precision-engineered to match original GU Old Style (Europa) specifications perfectly, ensuring seamless fitment and smooth operation with your existing lock strip and door hardware.
• Significant Cost Savings – Replace only the failed gearbox component rather than investing in a complete new multipoint lock system, saving you considerable money whilst achieving the same functional outcome. This GU old style gearbox 45mm repair solution is 50-70% cheaper than full lock replacement.
• Quick DIY Installation – Simple to fit with just a few screws to remove and replace; most homeowners can complete the GU old style gearbox 45mm installation in under 30 minutes with basic tools, avoiding costly locksmith call-out fees.
• Non-Handed Design – Features a reversible latch that easily adapts to suit both left and right-handed doors, providing versatile installation options and eliminating the need to order specific handed versions of your GU old style gearbox 45mm.
• Heavy-Duty Metal Construction – All-metal components with zinc-plated finish deliver exceptional durability and long-lasting performance, ensuring your repaired door lock withstands years of daily use.
• 45mm Backset with Spacer Bar Included – Includes the additional spacer bar for the wider 45mm backset dimension that was extensively used throughout UK door installations, with extended latch and deadbolt specifically engineered for this configuration.
• 92mm PZ Centres – Standard 92mm PZ measurement ensures perfect alignment with your existing door handles and euro cylinder, making this GU old style gearbox 45mm compatible with most UK door installations.
• Single Spindle Lift-Lever Operation – Features 8mm single spindle compatible with standard lever/lever handle sets, providing reliable everyday door operation through the familiar lift-to-lock mechanism.
• Euro Profile Cylinder Compatible – Works seamlessly with standard euro profile cylinders, allowing you to maintain your existing key system or upgrade your cylinder independently for enhanced door security.

Product Specifications:

• Brand: GU
• Product Type: Old Style gearbox 45mm backset, 92 PZ multipoint lock centre case
• Lock Type: Old Style (Europa) multipoint lock centre gearbox – provides the central locking mechanism for the full-length lock strip
• Compatibility: GU Old Style/Europa full-length lock strips with 3-screw centre case fixing (NOT compatible with New Style GU mechanisms)
• Operation Type: Lift-lever with single 8mm spindle for lever/lever handle operation
• PZ Centres: 92mm – the distance from spindle centre to cylinder centre, ensuring correct alignment with your existing door handles and cylinder
• Cylinder Type: Euro profile – compatible with standard euro cylinder locks
• Latch Reversal: Fully reversible for left or right-handed doors via simple edge strip removal and rotation
• Material & Finish: Zinc-plated metal construction for corrosion resistance and long-term durability
• Fixing Method: 3-screw attachment to lock faceplate with standardised screw spacing
• Suitable For: uPVC doors, composite doors, and timber doors fitted with GU Old Style multipoint locking systems

All measurements are approximate. Please verify dimensions against your existing gearbox before ordering to ensure correct fitment for your door.

Dimensions:

• Backset: 45mm (distance from door edge to centre of spindle/follower)
• Lock Case Length: 207mm (excluding fixing lugs)
• Lock Case Depth: 50mm
• Lock Case Width: Backset + 15mm
• Deadbolt Length: 33mm
• Deadbolt Throw: 20mm (when fully extended)
• Screw Hole Spacing: Top to middle screw 104mm, middle to bottom screw 77mm
• Total Screw Hole Distance: 181mm (between 1st and 3rd faceplate screw holes)
• Spindle Size: 8mm single spindle

Pro Tips:

Pro Tip: Before ordering your GU old style gearbox 45mm replacement, check your existing lock carefully. This gearbox is specifically for GU Old Style (Europa) locks where the centre case is fixed with 3 screws. If your current lock features split-spindle operation or fast-locking functionality, these functions are now obsolete and you'll need to upgrade to a complete New Style GU full-length lock instead. When measuring backset with the gearbox removed from the faceplate, always add 2mm to account for the faceplate thickness. Take a photo of your existing GU old style gearbox 45mm alongside a ruler to verify dimensions before purchasing—this ensures you get the correct replacement part for your door.

What's in the Pack?

• 1 × GU Old Style Gearbox 45mm Backset, 92 PZ Centre Case
• 1 × Spacer Bar (Pre-fitted, for 45mm backset configuration)

Frequently Asked Questions:

How do I know if this GU old style gearbox 45mm will fit my lock?

This GU old style gearbox 45mm is designed for GU Old Style (Europa) multipoint locks where the centre case is secured with 3 screws to the faceplate. The critical measurements for your GU old style gearbox 45mm are the 45mm backset and 92mm PZ centres (spindle to cylinder distance). Check your existing gearbox dimensions carefully—if your lock currently uses split-spindle or fast-locking functions, these are no longer available and you'll need a complete New Style GU lock instead. Refer to the technical diagram and measure your existing gearbox before ordering. The GU old style gearbox 45mm includes an extended latch and deadbolt that pass through the spacer bar, making it different from the 35mm backset variant.

Is the GU old style gearbox 45mm suitable for uPVC and composite doors?

Yes, this GU old style gearbox 45mm is suitable for uPVC doors, composite doors, and timber doors fitted with GU Old Style (Europa) multipoint locking systems. The 45mm backset specification was extensively used throughout UK installations on all door types. As long as your existing lock has the correct measurements (45mm backset and 92mm PZ centres) and is a GU Old Style lock with 3-screw centre case fixing, this gearbox will provide a perfect replacement.

How do I reverse the latch on my GU old style gearbox 45mm?

Reversing the latch on your GU old style gearbox 45mm is straightforward and takes just a few minutes. Simply remove the spacer bar strip from the edge of the gearbox by unscrewing the three fixing screws. Rotate the latch 180 degrees to change its direction, then reattach the spacer bar strip with the same three screws. This allows your GU old style gearbox 45mm to work on both left-handed and right-handed doors without needing different versions. Always test the door lock operation after reversing to ensure smooth function.

Why replace just the GU old style gearbox 45mm instead of the whole lock?

The centre gearbox is typically the component that fails in multipoint door lock systems—the rest of the lock strip, including the locking points and keeps, usually remains in perfect working order. Replacing only your GU old style gearbox 45mm saves you significant money compared to purchasing a complete new lock (often 50-70% cheaper), and it's much quicker to install as you're only removing and replacing the centre case rather than the entire lock strip, keeps, and door handles. This repair approach also means you can retain your existing cylinder and keys, avoiding the inconvenience of rekeying your doors.

What measurements do I need to check before ordering my GU old style gearbox 45mm?

Verify three critical measurements for your GU old style gearbox 45mm replacement: First, confirm your backset is 45mm (measure from the door edge to the centre of the spindle hole). Second, check your PZ centres are 92mm (measure from the centre of the spindle hole to the centre of the cylinder hole). Third, ensure your existing gearbox is fixed to the faceplate with 3 screws—GU Old Style locks use this configuration. If your measurements don't match or your lock has split-spindle/fast-locking functions, this gearbox won't be compatible with your door. When measuring a removed gearbox, add 2mm to account for faceplate thickness.

Why Choose This GU Old Style Gearbox 45mm?

When your multipoint door lock fails, don't assume you need an expensive complete replacement. This precision-engineered GU old style gearbox 45mm centre case offers the smart, economical solution that restores your door security without breaking the bank. Manufactured to exacting standards with heavy-duty metal components, this GU old style gearbox 45mm replacement delivers the same reliable performance as the original factory-fitted mechanism. Whether you're a capable DIYer looking to save on locksmith fees or a trade professional seeking quality replacement parts for door lock repairs, this GU old style gearbox 45mm provides the perfect balance of affordability, durability, and straightforward installation. Restore your door's full functionality today and enjoy the satisfaction of a cost-effective repair that extends the life of your existing lock system for years to come.