How to fit an entrance knob lock
If you are fitting a knob set lock to a new door, there are 12 steps you will need to take. They will ensure your entrance lock will work without any problems.
The 12 steps to fit a tiebolt knob lockset:
- Mark the position of the two holes in the door. The lock should be fitted around 1000mm from the floor level. The large hole-saw hole and the hole in the edge of the door are first marked.
- Drill the large hole using a hole-saw. This is the main hole on the side of the door. The two knobs will be fitted over this hole.
- Drill the hole in the edge of the door. This is the hole that the latch is fitted into.
- Mark out the the latch rebate.
- Chisel out the latch rebate. and install the latch using the two wood screws to hold the latch in place.
- Install the lock onto the door. The lock is held on by two screws on the inside of the door.
- Mark The strike centre on the door.
- Drill the strike hole with a spade bit. This is where the latch enters into.
- Trace the outline of the strike. Making sure it is in the correct position.
- Chisel out the strike rebate.
- Install the strike. Use the two wood screws to screw it onto the frame.
- Check the lock function. Make sure the lock is functioning correctly.
Following these steps will help with your knob lock installation. Always do the final check to make sure the lock is in good working order.
Position the lock on the door
When fitting a knob lock, first work out what height from the floor you want the lock fitted. Most entrance locks are fitted around the 1 meter from the floor.
Mark the position of the two holes you need to make on the door. There is usually a template provided with the lock. A square is helpful for accurate measurement.
Holesaw cut for the knobs
The hole saw is used to make a large hole in the side of the door. This cut accommodates the inside and outside knob that attach over this cutout. The knobs have parts that protrude into this hole cutout.
Most tiebolt locks have an adjustable latch. It can be fitted at either 60mm or 70mm. Make sure to fit your lock at the correct backset length.
Spade bit cut for latch
Use a drill and spadebit to make the hole in the edge of the door. This hole is centred with the holesaw cut hole. It is also centred in the middle of the door.
Drill all the way through into the large holesaw cut hole.
Installing the latch
The latch is the first piece to be installed onto the door.
The cutout for the latch is marked onto the door. It can be marked with a pencil. Then using a chisel, the recess for the latch faceplate is made. The latch sits flush with the door edge.
Screw the latch to the door with the supplied screws.
Installing the handles
Place the outside knob onto the door. Make sure the round screw nuts go through the latch holes.
Place the inside knob over the spindle, enduring the turnsnib can lock and unlock the lock.
Insert and tighten up the screws that hold the lock together.
Mark and drill the latch hole into the door frame
Mark the centre of the latch hole on the frame. Refer to your locks’ instructions for proper alignment.
Drill the hole into the door frame for a spade bit. This hole usually is 13mm deep. Check the depth of your latch for the exact depth.
Mark the position of the strike plate on the door frame
Place the strike plate in position over the hole on the frame. The strike plate is usually around 3mm off centre towards the back edge of the door frame. Refer to your locks’ instructions for proper alignment.
Install the strike plate
Chisel out the recess. The strike plate should sit flush with the door frame. Chisel out the square for the latch hole if required.
Screw the strike plate to the door frame. Use a small drill to make pilot holes if required. You can usually screw the wood screws straight in if the frame is made from soft wood.
The Lock Mob locksmith Toowong are a Brisbane based locksmith and security advisors. Contact us for any locks, key and security problem you may have.
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