How to remove and measure a thumb turn euro profile lock cylinder
Thumb turn removal:
- Remove the lock retaining screw from the edge of the door (located on the edge of the door and inline with the bottom of the cylinder).
- Whilst turning the thumb turn slightly, remove the cylinder with a gentle pulling motion.
Measuring the cylinder:
- Measure from the outside edge of the cylinder (T) to the centre of the locking cam.
- Measure from the opposite edge of the cylinder (B) to the centre of the locking cam.
- Measure edge to edge (O) for overall length of cylinder.
Example: If dimension T = 45 mm and dimension B = 40 mm order a T45/40 cylinder, (dimension o = 45 + 40 = 85 mm).
The "T" prefix denotes the thumbturn or inside part of the lock.