Gleason bevel gear system

Gleason bevel gear system

[′glēs·ən ¦bev·əl ¦gir ‚sis·təm]
(design engineering)
The standard for bevel gear designs in the United States; employs a basic pressure angle of 20° with long and short addenda for ratios other than 1:1 to avoid undercut pinions and to increase strength.