Standard Bore Size For Residential Door Lock

First doors can usually be re drilled.

Standard bore size for residential door lock.

Most of the current locks require the standard 2 1 8 bore. Usually the backset measures 2 3 8 inches or 2 3 4 inches. Fit into the door prep shown above. The latch will fit into the 1 inch hole.

If one wants to replace their locks on doors that have smaller diameter holes there are 2 options. Through the edge of the door there is a 1 cross bore that extends from the edge of the door through the bore hole. All standard bored locks ansi 115 2 161 61l type for mortise lock ansi 115 1 86 type all locations must be altered 3 8 lower and standard strike asa type. If you re installing several doors it s acceptable to drill the doorknob hole at 40 inches or centered vertically.

There are many types of door locks which can influence the lock hole size as well. Still more exceptions standard interior slab doors are 80 inches tall. Bore a 2 1 8 inch hole through the door. The cross bore is the place where the latch has to be installed.

The standard bore is 2 1 8. The door has a bore that is around 1 inch in length and it extends from the door edge and goes through the bore hole. Cross or edge bore. Lock bore the diameter of the hole for the lock body.

Exterior doors are typically 1 3 4 inches thick while interior doors measure 1 3 8 inches thick. Installation at 40 inches is common on affordable homes mobile homes and production homes. The center of this hole should be located 2 3 8 inches or 2 3 4 inches back from the edge of the door. The small hole along the edge of the door frame usually measuring about 1 inch in diameter.

This cross bore is where the latch is installed. The standard measurement for a bore hole is 2 1 8 inch in diameter and the standard measurement of a cross bore is 1 inch in diameter. Many older doors had bores that were been smaller. If you have a door that already has a bore hole in it measure the diameter of this hole to make sure the back plate or rosette will fit.

Opening heights 3 0 through 4 11 15 16 centered in door height not frame.