Using a lock jig typically involves preparing both the door and the door frame for a lock set. Based on the provided reference, a key step involves accurately positioning the jig on the door frame to prepare for the strike plate recess.
Lock jigs are specialized tools designed to help users accurately and quickly cut the necessary recesses and holes for fitting locks into doors and door frames. They ensure correct alignment for the lock body (mortise), the faceplate on the door edge, and the strike plate on the frame.
Positioning a Lock Jig for the Strike Plate (As Per Reference)
The provided reference specifically details a crucial step for positioning the lock jig on the door frame, which is sometimes referred to as the "deck post". This positioning ensures the strike plate recess aligns correctly with the lock bolt once the door is closed.
Here are the steps described in the reference for positioning the jig on the frame:
- Placement: You need to "put it onto the deck post." (Place the jig securely onto the door frame where the strike plate will be located).
- Initial Alignment: Position the jig "Back onto the back of the lock". (Align the jig relative to the back edge of the lock body that is already fitted in the door).
- Add Clearance: Next, "give yourself a little bit of clearance". (Slightly offset the jig from the initial alignment point to allow proper bolt throw).
- Vertical Adjustment: Then, "pull it back up a little bit". (Make any necessary vertical adjustments to the jig's position).
- Secure: Finally, "then tighten. Off." (Securely fasten the lock jig to the door frame to prevent movement during the cutting process).
This precise positioning ensures that when the strike plate recess is cut and the strike plate is installed, the lock bolt will extend smoothly into the frame, allowing the door to latch and lock correctly.
Other Primary Uses of a Lock Jig
While the reference details positioning for the strike plate on the frame, lock jigs are also essential for preparing the door itself. These primary uses typically include:
- Cutting the Mortise: Creating the deep pocket in the edge of the door where the main lock body (mortise lock) or latch mechanism sits.
- Cutting the Faceplate Recess: Creating the shallow recess on the edge of the door around the mortise, where the lock faceplate sits flush with the door surface.
These steps require setting up the jig on the door edge rather than the frame.
Proper use of a lock jig, including accurate positioning on both the door and frame as outlined by manufacturers and techniques like the one described in the reference for strike plate placement, is vital for a well-fitted and functional lock.
