BrassMeIn.com: NEMA Standard Electric Motor Key Slot Size vs Shaft size






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NEMA Standard Electric Motor Key Slot Size vs Shaft Size

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Shaft
(U)
Key
(R)
Dimen
(S)
3/8 21/64 flat
1/2 29/64 flat
5/8 33/64 3/16
7/8 49/64 3/16
1-1/8 63/64 1/4
1-3/8 1-13/64 5/16
1-5/8 1-13/32 3/8
1-7/8 1-19/32 1/2
2-1/8 1-27/32 1/2
2-3/8 2-1/64 5/8
2-1/2 2-3/16 5/8
2-7/8 2-29/64 3/4
3-3/8 2-7/8 7/8
3-7/8 3-5/16 1

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