Machinery's Handbook, 31st Edition
2560
INCH KEYS AND KEYSEATS Table 10. ANSI Keyseat Dimensions for Woodruff Keys ANSI/ASME B17.2-1967 (R2013) Table 10. (Continued) ANSI Keyseat Dimensions for Woodruff Keys
Key Above Shaft
Keyseat—Shaft
Keyseat—Hub
Nominal Size Key
Key No.
Width A a
Depth B +0.005 − 0.000
Diameter F
Height C Width D
Depth E +0.005 − 0.000
+0.005 − 0.005
+0.002 − 0.000
Min.
Max.
Min. 1.375 1.500 1.500 1.500 2.125 2.125 2.125 2.125 2.125 2.125 2.125 2.125 2.750 2.750 2.750 2.750 2.750 2.750 2.750 2.750 2.750 2.750 3.500 3.500 3.500 3.500 3.500 3.500 3.500
Max. 1.398 1.523 1.523 1.523 2.160 2.160 2.160 2.160 2.160 2.160 2.160 2.160 2.785 2.785 2.785 2.785 2.785 2.785 2.785 2.785 2.785 2.785 3.535 3.535 3.535 3.535 3.535 3.535 3.535
0.3735 0.3755 0.4015 0.2487 0.2505 0.5110 0.3111 0.3130 0.4798 0.3735 0.3755 0.4485 0.1863 0.1880 0.3073 0.2487 0.2505 0.2760 0.3111 0.3130 0.2448 0.3735 0.3755 0.2135 0.1863 0.1880 0.4323 0.2487 0.2505 0.4010 0.3111 0.3130 0.3698 0.3735 0.3755 0.3385 0.2487 0.2505 0.4640 0.3111 0.3130 0.4328 0.3735 0.3755 0.4015 0.4360 0.4380 0.3703 0.4985 0.5005 0.3390 0.2487 0.2505 0.6200 0.3111 0.3130 0.5888 0.3735 0.3755 0.5575 0.4360 0.4380 0.5263 0.4985 0.5005 0.4950 0.3735 0.3755 0.7455 0.4360 0.4380 0.7143 0.4985 0.5005 0.6830 0.5610 0.5630 0.6518 0.6235 0.6255 0.6205 0.6860 0.6880 0.5893 0.7485 0.7505 0.5580
0.1875 0.3760 0.1935 0.1250 0.2510 0.1310 0.1562 0.3135 0.1622 0.1875 0.3760 0.1935 0.0937 0.1885 0.0997 0.1250 0.2510 0.1310 0.1562 0.3135 0.1622 0.1875 0.3760 0.1935 0.0937 0.1885 0.0997 0.1250 0.2510 0.1310 0.1562 0.3135 0.1622 0.1875 0.3760 0.1935 0.1250 0.2510 0.1310 0.1562 0.3135 0.1622 0.1875 0.3760 0.1935 0.2187 0.4385 0.2247 0.2500 0.5010 0.2560 0.1250 0.2510 0.1310 0.1562 0.3135 0.1622 0.1875 0.3760 0.1935 0.2187 0.4385 0.2247 0.2500 0.5010 0.2560 0.1875 0.3760 0.1935 0.2187 0.4385 0.2247 0.2500 0.5010 0.2560 0.2812 0.5635 0.2872 0.3125 0.6260 0.3185 0.3437 0.6885 0.3497
1211
3 ∕ 8 × 1 3 ∕ 8 1 ∕ 4 × 1 1 ∕ 2 5 ∕ 16 × 1 1 ∕ 2 3 ∕ 8 × 1 1 ∕ 2 3 ∕ 16 × 2 1 ∕ 8 1 ∕ 4 × 2 1 ∕ 8 5 ∕ 16 × 2 1 ∕ 8 3 ∕ 8 × 2 1 ∕ 8 3 ∕ 16 × 2 1 ∕ 8 1 ∕ 4 × 2 1 ∕ 8 5 ∕ 16 × 2 1 ∕ 8 3 ∕ 8 × 2 1 ∕ 8 1 ∕ 4 × 2 3 ∕ 4 5 ∕ 16 × 2 3 ∕ 4 3 ∕ 8 × 2 3 ∕ 4 7 ∕ 16 × 2 3 ∕ 4 1 ∕ 2 × 2 3 ∕ 4 1 ∕ 4 × 2 3 ∕ 4 5 ∕ 16 × 2 3 ∕ 4 3 ∕ 8 × 2 3 ∕ 4 7 ∕ 16 × 2 3 ∕ 4 1 ∕ 2 × 2 3 ∕ 4 3 ∕ 8 × 3 1 ∕ 2 7 ∕ 16 × 3 1 ∕ 2 1 ∕ 2 × 3 1 ∕ 2 9 ∕ 16 × 3 1 ∕ 2 5 ∕ 8 × 3 1 ∕ 2 11 ∕ 16 × 3 1 ∕ 2
812
1012 1212
617-1 817-1
1017-1 1217-1
617 817
1017 1217
822-1
1022-1 1222-1 1422-1 1622-1
822
1022 1222 1422 1622 1228 1428 1628 1828 2028 2228 2428
3 ∕ 4 × 3 1 ∕ 2 0.3750 0.7510 0.3810 a These Width A values were set with the maximum keyseat (shaft) width as that figure which will receive a key with the greatest amount of looseness consistent with assuring the key’s sticking in the keyseat (shaft). Minimum keyseat width is that figure permitting the largest shaft distortion ac - ceptable when assembling maximum key in minimum keyseat. Dimensions A, B, C, D are taken at side intersection. All dimensions are given in inches. The following definitions are given in this standard: Woodruff Key: A demountable machinery part which, when assembled into key-seats, provides a positive means for transmitting torque between the shaft and hub. Woodruff Key Number: An identification number by which the size of key may be readily determined. Woodruff Keyseat—Shaft: The circular pocket in which the key is retained. Woodruff Keyseat—Hub: An axially located rectangular groove in a hub. (This has been referred to as a keyway.) Woodruff Keyseat Milling Cutter: An arbor type or shank type milling cutter normally used for milling Woodruff keyseats in shafts (see page 895).
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