Add to this size a sufficient length for spindle to attach your knob or lever.
Front door split spindle.
In photo 24 the door is 1 3 4 plus about of trim.
Spindle 8mm x 4 15 16 split 125mm length 2 1 2 door split spindle for 2 5 inch thick doors.
It is in fact the key that turns the latch bolt.
Try to measure the overall thickness of the door and trim together at the point the spindle passes through the lock.
This is because if you push down the outside handle it will not operate the latch bolt in the door.
The spindle passes through a square port inside the lock mechanism and operates the strike when a knob is turned.
The overall dimension is 2 1 2.
Dual spindle refers to there being two separate spindles usually used in lever pad door handles which are offset different heights.
Changing from single to split spindle operation.
Split spindles if your multi point locking door has a split spindle it means that when you go outside and close the door you will need a key to get back in.
Door spindles connect the doorknobs on each side of a door.
Typically if one or.