Need to replace your mortice lock ? Follow our quick and easy measurement guide to make sure you get the right size first time! To correctly measure a sashlock , you will need to take six measurements in total. It is then important to measure your lock, measure it from front to back it will either be 64mm 2. Since a mortice sashlock is a little more complicated – but very similar to a deadlock – the measurements you need are not so different. Measuring your door for a mortice lock couldn’t be easier.
The first measurement is . A – Case Depth, measurement taken from forend to end of the lock case. Mortice Sashlock Measurements. B – Backset , distance from forend to centre of keyhole . Selecting the right mortice lock can be difficult if you dont know what to measure and selecting the wrong one can mean that you will have to modify your door to . Look on the edge of the lock (faceplate) for any Names and numbers, i. Chubb Lever BS36(this is normally in a heart shaped kite mark, so look carefully) .