ROYMECHX

Taper Metric Key and Keyway Dimensions


BS 46 Rectangular Taper & Gib Head KeyWay & Key Dimensions




Ref Standard ..British Standard :BS 46 Part 1 : 1958 Keys and keyways and taper pins. Specification. Keys and keyways



BS 46 Rectangular Taper & Gib Head KeyWay & Key Dimensions

All Dimensions in inches


Shaft Diameter key   Keyway (Shaft   Keyway (Hub) Keyway
radius
D Width Height   W H   W h
Over To/Inc W T   Min Max Min Max   Min Max Min Max
1 1 1/4 5/16 1/4   0.311 0.312 0.146 0.152   0.312 0.313 0.090 0.096 0.010
1 1/4 1 1/2 3/8 1/4   0.374 0.375 0.150 0.156   0.375 0.376 0.086 0.092 0.010
1 1/2 1 3/4 7/16 5/16   0.437 0.438 0.186 0.192   0.438 0.439 0.112 0.118 0.020
1 3/4 2 1/2 5/16   0.499 0.500 0.190 0.196   0.500 0.501 0.108 0.114 0.020
2 2 1/2 5/8 7/16   0.624 0.625 0.260 0.266   0.625 0.626 0.162 0.168 0.020
2 1/2 3 3/4 1/2   0.749 0.750 0.299 0.305   0.750 0.751 0.185 0.191 0.020
3 3 1/2 7/8 5/8   0.874 0.875 0.370 0.376   0.875 0.876 0.239 0.245 0.062
3 1/2 4 1 3/4   0.999 1.000 0.441 0.447   1.000 1.001 0.293 0.299 0.062
4 5 1 1/4 7/8   1.248 1.250 0.518 0.524   1.250 1.252 0.340 0.346 0.062
5 6 1 1/2 1   1.498 1.500 0.599 0.605   1.500 1.502 0.384 0.390 0.062
6 7 1 3/4 1 1/4   1.748 1.750 0.740 0.746   1.750 1.752 0.493 0.499 0.125
7 8 2 1 3/8   1.998 2.000 0.818 0.824   2.000 2.002 0.539 0.545 0.125
8 9 2 1/4 1 1/2   2.248 2.250 0.897 0.905   2.250 2.252 0.581 0.589 0.125
9 10 2 1/2 1 5/8   2.498 2.500 0.975 0.983   2.500 2.502 0.628 0.636 0.187
10 11 2 3/4 1 7/8   2.748 2.750 1.114 1.122   2.750 2.752 0.738 0.746 0.187
11 12 3 2   2.998 3.000 1.195 1.203   3.000 3.002 0.782 0.790 0.187


Key Dimensions


Key   Gib Head   Pref. Length
taper (L)
Width Height W T   A B C D R  
W T Max Min Max Min               Taper Gib Head
5/16 1/4 0.314 0.312 0.254 0.249   3/8 7/16 1/4 0.3 1/16   3/4 to 3  
3/8 1/4 0.377 0.375 0.254 0.249   7/16 7/16 9/32 0.3 1/16   1 to 4 2 to 5
7/16 5/16 0.440 0.438 0.316 0.311   1/2 9/16 5/16 0.4 1/16   1 1/2 to 4 2 1/2 & 3 to 6
1/2 5/16 0.502 0.500 0.316 0.311   9/16 5/8 3/8 0.4 1/16   1 3/4 to 5 2 1/2 & 3 to 6 1/2
5/8 7/16 0.627 0.625 0.442 0.437   11/16 3/4 7/16 0.5 1/8   1 to 4 2 to 6
3/4 1/2 0.752 0.750 0.504 0.499   13/16 7/8 17/32 0.5 1/8   1 3/4 to 4 2 1/2 & 3 to 6
7/8 5/8 0.877 0.875 0.630 0.624   15/16 1 21/32 0.6 1/8   2 1/2 to 5 5 & 6 to 8
1 3/4 1.003 1.000 0.755 0.749   1 1/16 1 1/4 23/32 0.6 1/8     6 & 7 to 8
1 1/4 7/8 1.253 1.250 0.880 0.874   1 5/16 1 1/2 27/32 0.7 1/4      
1 1/2 1 1.504 1.500 1.007 0.999   1 9/16 1 5/8 1 1/32 0.7 1/4      
1 3/4 1 1/4 1.754 1.750 1.257 1.249   1 13/16 2 1 7/32 0.8 1/4      
2 1 3/8 2.005 2.000 1.382 1.374   2 1/16 2 1/4 1 13/32 0.8 1/4      
2 1/4 1 1/2 2.255 2.250 1.509 1.499   2 5/16 2 1/2 1 9/16 0.9 3/8      
2 1/2 1 5/8 2.505 2.500 1.634 1.624   2 9/16 2 3/4 1 11/16 0.9 3/8      
2 3/4 1 7/8 2.755 2.750 1.884 1.874   2 13/16 3 1 15/16 1.0 3/8      
3 2 3.006 3.000 2.014 1.999   3 1/16 3 2/8 2 1/16 1.0 3/8