Ch 2 page 255 TRANSMISSION Contact pattern examples of Gleason Tooth System Field of application: The contact pattern examples are applicable for all bevel gear sets in MT and MS axles which have a ratio between 1.5 Furthermore, the examples are only valid for ground bevel gear sets. (The examples are just partially applicable for lapped contact patterns). Ideal contact pattern: Contact pattern setting: The contact patterns are viewed on the crown wheel flanks. The contact pattern must be tangent to the middle of tooth (t ooth centerline), otherwise it is too close to the tooth top or root.
Furthermore, the contact pattern should cover at least 50% of the flank in h-direction (inspection criterion). General: By shifting the pinion the contact pattern is moved to the root or top. Pinion mounting distance in +: = reduce pinion shim thickness Pinion mounting distance in -: = increase pinion shim thickness Flank glossary: Convex flank = drive side Concave flank = coast side Toe = crown wheel inner side Heel = crown wheel outer side Note: The following pages describe three different examples of contact patterns! SHOP MANUAL