Union Monarch & Everest uPVC and Aluminium Door Gearbox Replacements
Browse our range of Union Monarch and Union Everest replacement gearbox cases for uPVC and aluminium doors. These replacement lock cases are ideal when the original centre gearbox has become worn, damaged, jammed or difficult to operate.
Replacing only the gearbox case can be a cost-effective alternative to changing the complete multipoint door lock mechanism. Our collection includes replacement gearboxes designed for older Union locking systems commonly fitted to residential and commercial uPVC and aluminium doors.
Suitable replacements may include:
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Union Monarch gearbox cases
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Union Everest gearbox cases
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uPVC door lock gearbox replacements
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Aluminium door lock gearbox replacements
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Replacement centre cases for multipoint locks
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Gearboxes for broken or discontinued Union door locks
Before ordering, carefully compare your existing gearbox measurements and markings, including:
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Handle-to-keyhole centres (PZ)
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Backset measurement
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Gearbox case dimensions
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Fixing screw centres
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Spindle and cylinder positions
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Faceplate and connection type
A replacement Union gearbox may help resolve common problems such as a loose door handle, a jammed locking mechanism, difficulty lifting the handle, or a key that no longer locks and unlocks the door correctly.
Shop our range of Union Monarch and Everest uPVC and aluminium door gearbox replacements to find the correct centre case for your door lock repair.
