MILLING MACHINE OPERATIONS - OD1644 - LESSON 1/TASK 1
lock screw on the right front of the saddle and the adjusting screw on the
left front of the saddle.
The saddle gib is at the rear of the saddle on the left side, while
the adjusting screw is at the front of the saddle on the left side.
knee gib lock screw is on the bottom of the knee on the left side and the
adjusting screw is on the top on the left side.
To adjust the table gib, loosen the table gib lock screw several
turns and tighten the adjusting screw on the opposite side of the table
until the gib is pressing against the table dovetail.
Tighten the lock
screw. (Do not tighten the lock screw too tight as it distorts the gib.)
Run the table back and forth and check the table for drag. To adjust the
saddle and knee, use the same procedures as above.
Adjustments With The Dial Indicator.
should be made: (Use figure 22 on the following page as reference.)
tested for looseness by pulling back and forth on the end of the table.
Anything over 0.0015-inch is too much and requires the gibs to be adjusted,
also the table should snap back to the "0" reading each time after the table
To check the saddle gib, the indicator should be mounted as in
Position 7 and the same tolerance should exist here.
The knee gib will be checked as shown, with the dial indicator in
Position 5, by grasping the table and lifting up and pushing down.
reading of deflection here should not be more than 0.0003 of an inch.
As a final check, set the dial indicator on Position 2 and run the
table to its extreme right and left positions. The indicator runout should
not be more than 0.0015 of an inch.
Quill Feed Clutch.
Adjustment of this clutch is as follows: