How To Fit A Cylinder Door Lock

Push the cylinder out of the lock maybe you need to push hard step 2.

How to fit a cylinder door lock.

If you only fit one lock go for an automatically dead locking night latch made to bs3621. Fitting sizes should be printed on the instructions that come with the lock. The top of the cylinder contains pins and springs which keep pressure on the keyed pins. Remove the old cylinder from your door.

A cylinder lock has a latch which automatically engages into a keep when the door is closed. Next is to mark the lock body. Drill the cylinder hole by using an auger or expanding drill bit. Insert the old key and turn it either to the left or right.

If it is not possible to use a mortise lock you can fit a rim lock which is mounted on the surface of the door. Make sure you use the correct size. To avoid splintering as the drill passes through the thickness of the door to the other side hold a block of wood on the opposite side of the door to allow the bit to drill into it on the other side. You ll then be able to screw the cylinder to the mounting plate.

With a thin door like this the recess for a mortise lock would weaken the door structure too much. The cylinder should be inserted through the face plate and the back plate mounted on to the back of the door. From the inside of the door adjust the inside cylinder to line up the screw holes with the exterior portion of the lock. A new cylinder lock will usually come with fitting instructions and a template for marking the door but if you want to know how to go about it simply follow these steps.

Unscrew the main screw red dot place the key inside the cylinder and turn it to the left or right to make sure that the carrier is parallel with the cylinder. The most critical part of this operation is removing the cylinder plug from the cylinder. Put it over the mounting plate so that you can pencil around the overhang. To install this lock see section 4 below.

This may be the case for example with a door that is less than 40 mm thick. Position a mortice deadlock about halfway up the door and fit a night latch on your front door one third of the way down. Using the body of the lock as a template mark the. Fit the inside cylinder so that the holes for the screws line up with the exterior side.

You ll now need to chisel out a recess for the lock to.