Ring And Pinion Gear Pattern

The images below illustrate both acceptable and unacceptable ring and pinion gear patterns.

Ring and pinion gear pattern.

This pattern indicates excessive pinion depth. Move the ring gear away from the pinion increase backlash while maintaining minimum backlash. Ring gear tooth profile face hobbing face milling the toe of the gear is the portion of the tooth surface at the end towards the center. When the pinion is too far in towards the ring gear the pattern is low toward the base of the gear teeth.

When setting up a ring pinion there are four critical settings that need to be correct in order to get proper setup and good gear life. Ring and pinion gear pattern is one of the most valuable tools for determining if a differential is properly set up. Begin by setting proper pinion bearing preload total turning preload and ring gear backlash. Moving the ring gear away from the pinion increases backlash and causes the pattern to move out toward the heel of the ring gear.

Proper ring gear to pinion gear contact pattern is critical for quiet and trouble free gear set operation. The heel of the gear tooth is the portion of the. Load the ring gear and run a full contact pattern check. Ring gear and pinion tooth pattern interpretation the final pinion position will be verified by using the gear contact pattern method described as follows.

Pinion depth how close the pinion is to the ring gear backlash how close the ring gear is to the pinion pinion bearing preload how much bearing drag is on the pinion bearings and carrier. Ring and pinion gear pattern interpretation adjustment. Toe contact pattern is concentrated off the toe end of the drive gear tooth. Move the ring gear closer to the pinion decrease backlash while maintaining minimum backlash.