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How to measure a lockcase/gearbox

Although you might not require all of the measurements below, it is worth bearing in mind that the more information we have, the easier it will be to ensure you purchase the correct replacement.



First measurements

A - Handle/spindle centre
The distance from the centre of the keyhole to the centre of the handle/spindle. In this example there are two possible spindle points.
B - Lockcase length
The distance from the top to the bottom of the lockcase which sits inside the door itself.
C - Backset
The distance from the middle of the spindles to the front face of the lock.
D - Faceplate length
The distance from the top to bottom of the faceplate which sits flush on the door.
E - Lockcase depth
The distance from the faceplate to the back of the lockcase.


More measurements

F - Faceplate width
The horizontal width of the faceplate that sits flush to the door.
E - Lockcase width
The horizontal width of the lockcase that is inserted into the void in the door.

Same Day Dispatch

Our generous stock inventory means that we can supply those much-needed spare parts on same day dispatch: enabling you to get on with the job as quickly as possible.

Send Us A Photo

From one-off purchases through to trade accounts we are here to help. If there is anything you are not sure of please contact us: if you're searching for a specific part, why not send us a photo – we can often help to identify the required part that way; giving you extra peace of mind.

Send Your Photo To
07734 955 325
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