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AGMA 9003

Revision C17, December 6, 2017

Complete Document

Flexible Couplings – Keyless Fits

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Product Details:

  • Revision: Revision C17, December 6, 2017
  • Published Date: December 6, 2017
  • Status: Active, Most Current
  • Document Language: English
  • Published By: American Gear Manufacturers Association (AGMA)
  • Page Count: 35
  • ANSI Approved: Yes
  • DoD Adopted: No

Description / Abstract:

This standard presents information on design, dimensions, tolerances, inspection, mounting, removal, and equipment that is in common use with keyless tapered and keyless straight (cylindrical) bore hubs for flexible couplings. Calculated hub stress values and hub to shaft torque capacities are nominal values. This standard does not present a rigorous analysis of the components.


This Standard applies only to hubs and solid shafts made of steel, which generally have material properties of modulus of elasticity equal to 30 × 106 lb/in2, density equal to 0.283 lb/in3, and thermal expansion coefficient equal to 6.36 × 10-6 in/in/°F.


This standard does not apply to couplings attached to shafts with keyways, splines, split hubs or polygon bores.