Precision Gear: PG TECH
Gearing Contact Patterns
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Ring & Pinions
PG Tech
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A
IDEAL CONTACT Pattern is spread evenly over tooth's profile with concentration nearer toe than heel.
B
COMPETITION CONTACT Pattern concentrated just up from the toe covering 1/3 to 1/2 of the tooth.
C
HIGH CONTACT Pattern is concentrated at the crown of the drive gear tooth. Move the pinion deeper in towards the differential carrier (add pinion shim).
D
LOW CONTACT Pattern is concentrated in the root of the drive gear tooth. Move the pinion out away from the differential carrier (subtract pinion shim).
E
HEEL CONTACT Pattern is concentrated off the heel end of the drive gear tooth. Move the ring gear closer to the pinion (decrease backlash) while maintaining minimum backlash.
F
TOE CONTACT Pattern is concentrated off the toe end of the drive gear tooth. Move the ring gear away from the pinion (increase backlash) while maintaining minimum backlash.