Gleason 20 Inch Straight Beveled Gear System, Tooth Proportions Manual 1960

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Gleason 20 Inch Straight Beveled Gear System, Tooth Proportions Manual Year (1960)

This Manual Covers Models: 
20”
20 Inch

This Manual Includes:
Standardized Tooth Proportions for Generated Straight Bevel Gears
  This Manual Has  188 Printed Pages.
Year Revised 1960