Related Resources: hardware
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
Related:
- Shaft Key Seat for Shaft and Hub ANSI B17.1
- Shaft Arbor and Keyseat Dimensional Data ANSI B94.19
- Keyseat Design Tolerances for Electric Motors and Generators
- Arbor Keyway Cutter Hole Keyway Dimensional Data per ANSI/ASME B94.19
- Shaft Arbor Keyway Dimensional Data ANSI/ASME B94.19
- Woodruff Key Size Data per. B17.2
- Design of Square Key and Keyway Woodruff Stress, Shear and Torque
|
ANSI
Key No. |
Nominal
Size |
Keyseat
Shaft |
Key |
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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