Identifying a replacement Upvc door gearbox can be a daunting task at first glance, however with a little bit of knowledge the experience can become a much easier challenge than you might have first perceived.

Firstly you want to identify the brand, if you have the brand as a starting point then you have already narrowed down the choice from 100's of gearboxes to a handful. Popular brands include Maco, Mila and ERA.

Next is to take note of the gearboxes shape, as theirs no point in looking at something that won't fit in your existing door.

The backset dimension is the key measurement you want to identify, this is the measurement from the keyhole centre to the edge of the gearbox.

The PZ measurement is the other key dimension you want to identify, this is measured from the spindle hole centres to keyhole centres.

Finally locking points, these are key visual indicators that can quickly help you narrow down the choice of gearboxes available. Locking points can include a Deadbolt, hooks (that point up or down) or a latch.

Its worth mentioning that batch or production information often stamped on gearboxes cannot be used to help identify a replacement door gearbox.

To make Upvc Door Gear Box Identification easier we have produced this diagram below.

If you still require help or advice then do Contact Us we aim to respond promptly during business hours.