Schlage Knobs and Levers
Door Preparation Instructions for Door with Existing Holes
Tools Needed
- Tape Measure
- Pencil
- Drill and Drill Bits (Bit Sizes: 1/8", 7/8")
- Hole Saw (2 1/8")
- Chisel
- Hammer
1 Measure door thickness.
If the door is thinner than 1 3/8" or thicker than 1 3/4", then the lock will not fit properly on the door.
[Diagram: Door edge with measurement indicator for 1 3/8" - 1 3/4" thickness.]
2 Measure the backset.
If existing backset is not 2 3/8" or 2 3/4", then the lock will not fit properly on the door.
[Diagram: Door edge with measurement indicator for 2 3/4" or 2 3/8" backset.]
3 Measure the hole sizes.
3a
If hole sizes are larger than those shown, then the lock will not fit properly on the door. If hole sizes are smaller than those shown, see step 3b.
[Diagram: Door face showing correct 2 1/8" hole size and indicating if holes are too large or too small.]
3b
If necessary, enlarge hole in door face.
[Diagram: Illustrating the use of a 2 1/8" Hole Saw on the door face.]
3c
If latch does not fit, enlarge hole in door edge.
[Diagram: Showing Mortise faceplate and Circular drive-in faceplate with measurements 7/8" preferred and 1" for the door edge hole.]
4 Check the door jamb.
4a
Place new latch strike against the door jamb. If it does not fit properly, see steps 4b and 4c.
[Diagram: Latch strike positioned against the door jamb.]
4b
If correction is necessary, trace the faceplate and mark holes.
[Diagram: Faceplate used as a template to mark holes on the door jamb.]
4c
If necessary, use chisel, hammer and drill to correct door jamb preparation.
Cut the mortise so the strike extends all the way to the edge of the jamb to allow for the latch lip.
[Diagram: Showing a 1/16" Mortise being cut with a 1/8" Drill Bit in the door jamb.]
