
PATTERN INTERPRETATION
(RING GEAR)
FACE MILLING
DRIVE SIDE COAST SIDE
HEEL TOE CONDITION TOE HEEL CONDITION
CTION REQUIRED
Desirable pattern. The drive pattern Desirable pattern. The coast pattern
None
should be centered on the tooth. should be centered on the tooth, but
There should be some clearance may be slightly toward the toe.
between the pattern and the top of There should be some clearance
the tooth. between the pattern and the top
of the tooth.
Top heel contact Top toe contact Backlash correct. Thicker pinion
position shim required.
Root toe contact Root heel contact Backlash correct. Thinner pinion
position shim required.
Top heel contact Top heel contact Pinion position shim correct.
Decrease backlash.
Root toe contact Root toe contact Pinion position shim correct.
Increase backlash.
BULLETIN 5717-A 5/02 2 of 3
Spicer Technology, Inc.
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