HOW TO MEASURE YOUR CYLINDER (see diagram below)
- Measurement A - Measure from one end of the cylinder to the middle of the central screw hole (e.g. 40mm).
- Measurement B – Measure from the other end to the middle of the central screw hole (e.g. 50mm).
- This would be a 40/50 cylinder (90mm in length).
- No further measurements are required.
- (it is usually possible to measure the cylinder in the door but to get a perfect measurement you may need to remove the cylinder. – click here for details).