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Keyway Cutter Hole Keyway Dimensional Data - ANSI/ASME B94.19-1997
American National Standard Keys and Keyways

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The following is summarized from the American National Standard Keys and Keyways for Milling Cutters and Arbors ANSI/ASME B94.19-1997

Nominal Shaft (Arbor) and Keyseat Cutter Hole Diameter Nominal Size Square Key
Cutter Hole & Keyway
Hole and Keyway
C C D* H Corner Radius
Hole Dia. (Square) Max. Min. Min. Nom.
1⁄2 3⁄32 0.106 0.099 0.5578 3⁄64 0.020
5⁄8 1⁄8 0.137 0.130 0.6985 1⁄16 1⁄32
3⁄4 1⁄8 0.137 0.130 0.8225 1⁄16 1⁄32
7⁄8 1⁄8 0.137 0.130 0.9475 1⁄16 1⁄32
1 1⁄4 0.262 0.255 1.1040 3⁄32 3⁄64
11⁄4 5⁄16 0.343 0.318 1.3850 1⁄8 1⁄16
11⁄2 3⁄8 0.410 0.385 1.6660 5⁄32 1⁄16
13⁄4 7⁄16 0.473 0.448 1.9480 3⁄16 1⁄16
2 1⁄2 0.535 0.510 2.1980 3⁄16 1⁄16
21⁄2 5⁄8 0.660 0.635 2.7330 7⁄32 1⁄16
3 3⁄4 0.785 0.760 3.2650 1⁄4 3⁄32
31⁄2 7⁄8 0.910 0.885 3.8900 3⁄8 3⁄32
4 1 1.035 1.010 4.3900 3⁄8 3⁄32
41⁄2 11⁄8 1.160 1.135 4.9530 7⁄16 1⁄8
5 11⁄4 1.285 1.260 5.5150 1⁄2 1⁄8

MILLING CUTTERS

*D maximum is allways .010" larger than D minimum.

All dimensions given in inches.

 

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