This standard presents inch dimensions, tolerances, and sizes for straight bores, tapered bores, single keys and keyways for unmounted industrial flexible couplings. The keys are square or rectangular. This specification includes index tolerances for multiple keyways.

Inspection methods for straight and tapered bores and keyways are included in the annexes. The annexes also include the recommended design practice for tapered shafts for use with flexible couplings.

Application area

This standard is applicable to couplings as defined in ANSI/AGMA 9009-D02, Nomenclature for Flexible Couplings, with inch bores and keyways.

Excluded areas

This standard does not apply to couplings attached to shafts without keys (see ANSI/AGMA 9003-A91), shafts and bores with tapered keys, inch bores with metric keyways, metric bores with inch keyways, metric bores with metric keyways, or shaft keyseat tolerances. See ANSI/AGMA 9112-A04 for metric bores with metric keyways.