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4-11 CENTERING THE LATCH DRILL IN THE DOOR:
4-12 ALIGNING THE LOCK AND LATCH DRILLS:
SPECIAL ADJUSTMENTS
If you process any doors with a 5” backset, then this adjustment, if required, should be made with the
backset at 5”.
Press door against Main Bar, roll it to door stop and clamp in the usual manner. Bore and drill for the lock
and latch bolt. Measure the amount the latch bolt is off center in the door edge and the amount it is off
center where it enters the lock bore. If the latch hole is off center more where it enters the door edge than
where it enters the lock bore. The problem can usually be corrected by following these suggestions:
1. Turn off all electrical power to the machine and lock and tag-out.
2. Note the amount the latch hole is off center from the last door to be machined.
3. Measure and record the distance from the center of the latch drill to the main frame. Add or subtract
step #2 measurement from this distance.
4. Loosen the eight hex bolts, four on each side of the latch drill assembly that secure the assembly to
the frame mounting brackets.
5. Move the entire latch drill assembly toward you or away from you to achieve the dimension you
arrived at in step 3 above. The latch drill assembly can be moved in and out, and the parallel to the
frame can be changed by moving the top or bottom unequally to correct the angle drilled into the
door.
6. Tighten the hex bolts.
Under normal operating conditions the lock and latch drills will remain properly aligned. However,
should the machine (or in particular the lock drill) sustain a severe jar, the lock drill can become misalign.
Also, should you remove the lock drill motor for repair or replacement the new or repaired motor will
need to be realigned with the latch drill. Following is a suggested procedure:
1. 1. Clamp door.
2. Cycle the lock and latch drills to bore a set of test holes in a door.
3. Remove the door and extend lines from the lock hole edge to the door edge with a square.
4. Measure from the lines drawn in step 3 to the latch hole. Measurement “A” should equal measure
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ment “B”.
5. If the bores are not aligned the latch bore can be adjusted by loosening the bolts that secure the as
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sembly to the frame and moving slightly to the left or right as needed. Be sure to keep the motor at a
right angle to the door. Then check the lock height from the door stop and adjust if necessary.