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Keyseat Dimensions for Woodruff Keys per. ANSI B17.2

ANSI Hardware Design and Guide

ANSI Shaft and Hub Keyseat Dimensions for Woodruff Keys per. ANSI B17.2

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ANSI Shaft and Hub Keyseat Dimensions for Woodruff Keys ANSI Shaft and Hub Keyseat Dimensions for Woodruff Keys

ANSI
Key
No.
Nominal
Size
Keyseat
Shaft

Key
Above
Shaft

Keyseat
Hub
Width A*
Depth
B
Diameter
F
Height
C
Width
D
Depth
E
Key
Min.
Max.
+0.005
−0.000
Min.
Max.
+0.005
−0.005
+0.002
−0.000
+0.005
−0.000
202
1⁄16 × 1⁄4
0.0615
0.0630
0.0728
0.250
0.268
0.0312
0.0635
0.0372
202.5
1⁄16 × 5⁄16
0.0615
0.0630
0.1038
0.312
0.330
0.0312
0.0635
0.0372
302.5
3⁄32 × 5⁄16
0.0928
0.0943
0.0882
0.312
0.330
0.0469
0.0948
0.0529
203
1⁄16 × 3⁄8
0.0615
0.0630
0.1358
0.375
0.393
0.0312
0.0635
0.0372
303
3⁄32 × 3⁄8
0.0928
0.0943
0.1202
0.375
0.393
0.0469
0.0948
0.0529
403
1⁄8 × 3⁄8
0.1240
0.1255
0.1045
0.375
0.393
0.0625
0.1260
0.0685
204
1⁄16 × 1⁄2
0.0615
0.0630
0.1668
0.500
0.518
0.0312
0.0635
0.0372
304
3⁄32 × 1⁄2
0.0928
0.0943
0.1511
0.500
0.518
0.0469
0.0948
0.0529
404
1⁄8 × 1⁄2
0.1240
0.1255
0.1355
0.500
0.518
0.0625
0.1260
0.0685
305
3⁄32 × 5⁄8
0.0928
0.0943
0.1981
0.625
0.643
0.0469
0.0948
0.0529
405
1⁄8 × 5⁄8
0.1240
0.1255
0.1825
0.625
0.643
0.0625
0.1260
0.0685
505
5⁄32 × 5⁄8
0.1553
0.1568
0.1669
0.625
0.643
0.0781
0.1573
0.0841
605
3⁄16 × 5⁄8
0.1863
0.1880
0.1513
0.625
0.643
0.0937
0.1885
0.0997
406
1⁄8 × 3⁄4
0.1240
0.1255
0.2455
0.750
0.768
0.0625
0.1260
0.0685
506
5⁄32 × 3⁄4
0.1553
0.1568
0.2299
0.750
0.768
0.0781
0.1573
0.0841
606
3⁄16 × 3⁄4
0.1863
0.1880
0.2143
0.750
0.768
0.0937
0.1885
0.0997
806
1⁄4 × 3⁄4
0.2487
0.2505
0.1830
0.750
0.768
0.1250
0.2510
0.1310
507
5⁄32 × 7⁄8
0.1553
0.1568
0.2919
0.875
0.895
0.0781
0.1573
0.0841
607
3⁄16 × 7⁄8
0.1863
0.1880
0.2763
0.875
0.895
0.0937
0.1885
0.0997
707
7⁄32 × 7⁄8
0.2175
0.2193
0.2607
0.875
0.895
0.1093
0.2198
0.1153
807
1⁄4 × 7⁄8
0.2487
0.2505
0.2450
0.875
0.895
0.1250
0.2510
0.1310
608
3⁄16 × 1
0.1863
0.1880
0.3393
1.000
1.020
0.0937
0.1885
0.0997
708
7⁄32 × 1
0.2175
0.2193
0.3237
1.000
1.020
0.1093
0.2198
0.1153
808
1⁄4 × 1
0.2487
0.2505
0.3080
1.000
1.020
0.1250
0.2510
0.1310
1008
5⁄16 × 1
0.3111
0.3130
0.2768
1.000
1.020
0.1562
0.3135
0.1622
1208
3⁄8 × 1
0.3735
0.3755
0.2455
1.000
1.020
0.1875
0.3760
0.1935
609
3⁄16 × 11⁄8
0.1863
0.1880
0.3853
1.125
1.145
0.0937
0.1885
0.0997
709
7⁄32 × 11⁄8
0.2175
0.2193
0.3697
1.125
1.145
0.1093
0.2198
0.1153
809
1⁄4 × 11⁄8
0.2487
0.2505
0.3540
1.125
1.145
0.1250
0.2510
0.1310
1009
5⁄16 × 11⁄8
0.3111
0.3130
0.3228
1.125
1.145
0.1562
0.3135
0.1622
610
3⁄16 × 11⁄4
0.1863
0.1880
0.4483
1.250
1.273
0.0937
0.1885
0.0997
710
7⁄32 × 11⁄4
0.2175
0.2193
0.4327
1.250
1.273
0.1093
0.2198
0.1153
810
1⁄4 × 11⁄4
0.2487
0.2505
0.4170
1.250
1.273
0.1250
0.2510
0.1310
1010
5⁄16 × 11⁄4
0.3111
0.3130
0.3858
1.250
1.273
0.1562
0.3135
0.1622
1210
3⁄8 × 11⁄4
0.3735
0.3755
0.3545
1.250
1.273
0.1875
0.3760
0.1935
811
1⁄4 × 13⁄8
0.2487
0.2505
0.4640
1.375
1.398
0.1250
0.2510
0.1310
1011
5⁄16 × 13⁄8
0.3111
0.3130
0.4328
1.375
1.398
0.1562
0.3135
0.1622

NSI Shaft and Hub Keyseat Dimensions for Woodruff Keys per. ANSI B17.2 continued

 

Key No.
Nominal
Size Key
Keyseat
Shaft
Key
Above
Shaft
Keyseat
Hub
Width A*
Depth B
Diameter F
Height C
Width D
Depth E
Min.
Max.
+0.005
−0.000
Min.
Max.
+0.005
−0.005
+0.002
−0.000
+0.005
−0.000
1211
3⁄8 × 13⁄8
0.3735
0.3755
0.4015
1.375
1.398
0.1875
0.3760
0.1935
812
1⁄4 × 11⁄2
0.2487
0.2505
0.5110
1.500
1.523
0.1250
0.2510
0.1310
1012
5⁄16 × 11⁄2
0.3111
0.3130
0.4798
1.500
1.523
0.1562
0.3135
0.1622
1212
3⁄8 × 11⁄2
0.3735
0.3755
0.4485
1.500
1.523
0.1875
0.3760
0.1935
617-1
3⁄16 × 21⁄8
0.1863
0.1880
0.3073
2.125
2.160
0.0937
0.1885
0.0997
817-1
1⁄4 × 21⁄8
0.2487
0.2505
0.2760
2.125
2.160
0.1250
0.2510
0.1310
1017-1
5⁄16 × 21⁄8
0.3111
0.3130
0.2448
2.125
2.160
0.1562
0.3135
0.1622
1217-1
3⁄8 × 21⁄8
0.3735
0.3755
0.2135
2.125
2.160
0.1875
0.3760
0.1935
617
3⁄16 × 21⁄8
0.1863
0.1880
0.4323
2.125
2.160
0.0937
0.1885
0.0997
817
1⁄4 × 21⁄8
0.2487
0.2505
0.4010
2.125
2.160
0.1250
0.2510
0.1310
1017
5⁄16 × 21⁄8
0.3111
0.3130
0.3698
2.125
2.160
0.1562
0.3135
0.1622
1217
3⁄8 × 21⁄8
0.3735
0.3755
0.3385
2.125
2.160
0.1875
0.3760
0.1935
822-1
1⁄4 × 23⁄4
0.2487
0.2505
0.4640
2.750
2.785
0.1250
0.2510
0.1310
1022-1
5⁄16 × 23⁄4
0.3111
0.3130
0.4328
2.750
2.785
0.1562
0.3135
0.1622
1222-1
3⁄8 × 23⁄4
0.3735
0.3755
0.4015
2.750
2.785
0.1875
0.3760
0.1935
1422-1
7⁄16 × 23⁄4
0.4360
0.4380
0.3703
2.750
2.785
0.2187
0.4385
0.2247
1622-1
1⁄2 × 23⁄4
0.4985
0.5005
0.3390
2.750
2.785
0.2500
0.5010
0.2560
822
1⁄4 × 23⁄4
0.2487
0.2505
0.6200
2.750
2.785
0.1250
0.2510
0.1310
1022
5⁄16 × 23⁄4
0.3111
0.3130
0.5888
2.750
2.785
0.1562
0.3135
0.1622
1222
3⁄8 × 23⁄4
0.3735
0.3755
0.5575
2.750
2.785
0.1875
0.3760
0.1935
1422
7⁄16 × 23⁄4
0.4360
0.4380
0.5263
2.750
2.785
0.2187
0.4385
0.2247
1622
1⁄2 × 23⁄4
0.4985
0.5005
0.4950
2.750
2.785
0.2500
0.5010
0.2560
1228
3⁄8 × 31⁄2
0.3735
0.3755
0.7455
3.500
3.535
0.1875
0.3760
0.1935
1428
7⁄16 × 31⁄2
0.4360
0.4380
0.7143
3.500
3.535
0.2187
0.4385
0.2247
1628
1⁄2 × 31⁄2
0.4985
0.5005
0.6830
3.500
3.535
0.2500
0.5010
0.2560
1828
9⁄16 × 31⁄2
0.5610
0.5630
0.6518
3.500
3.535
0.2812
0.5635
0.2872
2028
5⁄8 × 31⁄2
0.6235
0.6255
0.6205
3.500
3.535
0.3125
0.6260
0.3185
2228
11⁄16 × 31⁄2
0.6860
0.6880
0.5893
3.500
3.535
0.3437
0.6885
0.3497
2428
3⁄4 × 31⁄2
0.7485
0.7505
0.5580
3.500
3.535
0.3750
0.7510
0.3810

* 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 acceptable when assembling maximum key in minimum keyseat.Dimensions A, B, C, D are taken at side intersection.

All dimensions are given in inches.

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