TM 9-3417-213-14 & P
A. PROPER GIB ADJUSTMENT PROCEDURE MUST BE DONE AFTER 40-HOURS ON NEW MILLS
Each 700 and 800 series of mills have three gibs. One at front dovetail of table; one on left dovetail of
saddle; one on left dovetail of knee.
Each gib is supplied with two lock or adjustment screws.
The table gib has a lock screw on the right front of the saddle and the adjusting screw is on the left front of
The saddle gib lock screw is at the rear of saddle on the left side, the adjusting screw is at the front of the
saddle on the left side.
The knee gib lock screw is on the bottom of the knee on the left side, the adjusting screw is on the top on
the left side.
Loosen the table gib lock screw several turns and tighten the adjusting screw until you feel the gib pressing
against table dovetail, then tighten the lock screw, Never get this lock screw too tight as it will distort the gib.
Run the table back and forth and check for drag.
Repeat this adjustment for the saddle and the knee gib.
Now to check the gibs with an indicator, the following checks must be made: (See Figure 1 for reference)
1. With indicator mounted as in Position 3, the table gib can be tested for shake by pulling back and
forth on the end of the table.
Anything over .0015 is too much, also the table should snap back to "0" each time.
2. To check the saddle gib, the indicator should be mounted as in Position 7 and the same tolerance
should exit here.
3. The knee gib will be checked as in Position 5 by grasping the end of the table and lifting up and
pushing down. Deflection here should not be more than .0003.
Now as a final check use Position 2 and run the table to its extreme right and left position.
The indicator runout should not be more than .0015.
B. QUILL FEED CLUTCH:
This clutch has been tested by drilling a 5/8 dia. drill in mild steel. After testing, the clutch is then adjusted
to a minimum setting. If in operation, larger pressures are developed which cause the clutch to ratchet, it
may be well to readjust the clutch using the steps below. If still larger pressures are needed after
readjusting, you may assist the Quill Feed by applying a downward pressure on the hand feed lever.
PROCEDURE FOR ADJUSTING THE CLUTCH
1. in the rear of the head between the head and the adapter is a hex nut (100-002-906) with a No.10-24
x 1/2 socket head cap screw for a lock.
a. First unscrew this lock screw until it is freely rotated with the fingers.
2. The minimum clutch tension is the position shown in the drawing. If more tension is desired, rotate
he hex nut (100-002-906) up to 180 from its present position, and relock the No. 10-24 socket head
3. It may also be desirable to adjust the travel of the clutch plunger:
a. This is done by means of the 1/4 20 x 3/4 socket set screw immediately behind the (100-004-543)
feed cam housing as shown in Section F-F.
b. With the clutch disengaged tighten the set screw until a little roughness can be felt when moving
the quill down by means of the hand lever.