The Union Monarch Replacement Door Lock Gearbox Case is designed as a reliable replacement for old, worn or failed Union Monarch locking mechanisms commonly fitted to uPVC and aluminium doors.
Ideal when the original gearbox has become difficult to operate, the handle is no longer engaging correctly or the internal mechanism has failed. Replacing the centre gearbox can often restore the operation of the existing multipoint locking system without needing to replace the complete lock strip.
Key Features
- Replacement gearbox case for Union Monarch door locks
- Suitable for selected uPVC and aluminium doors
- Euro profile cylinder
- Complete with dead locking snib
- Ideal replacement for discontinued or damaged lock cases
- Helps restore smooth handle and locking operation
- Designed to work with the existing multipoint lock strip
- Top and bottom shoot bolts are not included
- Suitable for professional and DIY door repairs
Product Measurements
- Cylinder Profile: Euro
- Handle Centres: 48mm
- Faceplate: 223mm x 25mm
- Case Height: 124mm
- Case Depth: 50.5mm
- Backset: 30.5mm
Please carefully compare the measurements, fixing points, spindle position and lock markings with your existing gearbox before ordering, as several similar Union lock cases are available.
Technical details are available in the product description.
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