4-68 REPAIR FIRST TURBINE ROTOR CASE (AVIM) (Continued)
In following step 25, do not stop rotation
during the clockwise or counter-clockwise
movement until stops are reached. Stopping
cutter before stops are reached may cause
deep gouges or chatter marks in case.
25. Place hands on collar (29) and rotate milling
machine (15) clockwise until front stop is reached
and immediately rotate milling machine (15)
counterclockwise until rear stop is reached.
Do not advance cutter more than one increment
counterclockwise rotations must be made
slowly and without stopping.
26. Turn adjusting knob (27) one increment
clockwise. One increment clockwise advances cutter
(20) radially 0.001 inch.
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