To measure a drawer lock, you primarily need to determine its backset. The backset is the distance from the top edge of the lock to the lock pin (center of keyhole).
Measuring with an Existing Lock
If you have the original lock:
- Measure the distance from the top edge of the lock to the lock pin (center of the keyhole).
- This measurement is the backset.
Measuring Without an Existing Lock
If you don't have the old lock:
- Determine the backset by measuring from the center of the keyhole (where the lock pin will be) to:
- The top edge of the drawer or box
- Or, the side edge of the door, depending on the lock placement.
This measurement will provide the necessary backset dimension.
Summary Table
| Situation | Measurement | Result |
|---|---|---|
| Existing Lock | Top edge of lock to center of keyhole (lock pin) | Backset |
| No Existing Lock | Center of keyhole location to top edge of drawer/box or side edge of door | Backset |
By following these steps, you can accurately measure a drawer lock for replacement or installation.
