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 Square Taper & Gib Head KeyWay & Key Dimensions
All Dimensions in inches
| Shaft Diameter |
key |
|
Keyway (Shaft |
|
Keyway (Hub) |
Keyway
radius
r |
| D |
Width/ Height |
|
W |
H |
|
W |
h |
| Over |
To/Inc |
W & T |
|
Min |
Max |
Min |
Max |
|
Min |
Max |
Min |
Max |
| 1/4 |
1/2 |
1/8 |
|
0.124 |
0.125 |
0.072 |
0.078 |
|
0.125 |
0.126 |
0.039 |
0.045 |
0.010 |
| 1/2 |
3/4 |
3/16 |
|
0.187 |
0.188 |
0.107 |
0.113 |
|
0.188 |
0.189 |
0.067 |
0.073 |
0.010 |
| 3/4 |
1 |
1/4 |
|
0.249 |
0.250 |
0.142 |
0.148 |
|
0.250 |
0.251 |
0.094 |
0.100 |
0.010 |
| 1 |
1 1/4 |
5/16 |
|
0.311 |
0.312 |
0.177 |
0.183 |
|
0.312 |
0.313 |
0.121 |
0.127 |
0.010 |
| 1 1/4 |
1 1/2 |
3/8 |
|
0.374 |
0.375 |
0.213 |
0.219 |
|
0.375 |
0.376 |
0.148 |
0.154 |
0.010 |
| 1 1/2 |
1 3/4 |
7/16 |
|
0.437 |
0.438 |
0.248 |
0.254 |
|
0.438 |
0.439 |
0.175 |
0.181 |
0.020 |
| 1 3/4 |
2 |
1/2 |
|
0.499 |
0.500 |
0.283 |
0.289 |
|
0.500 |
0.501 |
0.202 |
0.208 |
0.020 |
| 2 |
2 1/2 |
5/8 |
|
0.624 |
0.625 |
0.354 |
0.360 |
|
0.625 |
0.626 |
0.256 |
0.262 |
0.020 |
| 2 1/2 |
3 |
3/4 |
|
0.749 |
0.750 |
0.424 |
0.430 |
|
0.750 |
0.751 |
0.310 |
0.316 |
0.020 |
| 3 |
3 1/2 |
7/8 |
|
0.874 |
0.875 |
0.495 |
0.501 |
|
0.875 |
0.876 |
0.364 |
0.370 |
0.062 |
| 3 1/2 |
4 |
1 |
|
0.999 |
1.000 |
0.566 |
0.572 |
|
1.000 |
1.001 |
0.418 |
0.424 |
0.062 |
| 4 |
5 |
1 1/4 |
|
1.248 |
1.250 |
0.707 |
0.713 |
|
1.250 |
1.252 |
0.526 |
0.532 |
0.062 |
| 5 |
6 |
1 1/2 |
|
1.498 |
1.500 |
0.848 |
0.854 |
|
1.500 |
1.502 |
0.635 |
0.641 |
0.062 |
Key Dimensions
| Key |
|
Gib Head |
|
Pref.Length L |
Width
/Height |
W |
T |
|
A |
B |
C |
D |
R |
|
| W & T |
Max |
Min |
Max |
Min |
|
|
|
|
|
|
|
Taper |
Gib Head |
| 1/8 |
0.127 |
0.125 |
0.129 |
0.124 |
|
3/16 |
1/4 |
5/32 |
0.1 |
1/32 |
|
3/4 to 1 |
|
| 3/16 |
0.190 |
0.188 |
0.192 |
0.187 |
|
1/4 |
3/8 |
7/32 |
0.2 |
1/33 |
|
3/4 to 2 |
1 1/2 to 2 |
| 1/4 |
0.252 |
0.250 |
0.254 |
0.249 |
|
5/16 |
7/16 |
9/32 |
0.2 |
1/16 |
|
3/4 to 3 |
1 1/2 to 4 |
| 5/16 |
0.314 |
0.312 |
0.316 |
0.311 |
|
3/8 |
9/16 |
11/32 |
0.3 |
1/16 |
|
3/4 to 3 |
2 to 4 1/2 |
| 3/8 |
0.377 |
0.375 |
0.379 |
0.374 |
|
7/16 |
5/8 |
13/32 |
0.3 |
1/16 |
|
1 to 4 |
2 to 6 |
| 7/16 |
0.440 |
0.438 |
0.442 |
0.437 |
|
1/2 |
3/4 |
15/32 |
0.4 |
1/16 |
|
1 3/4 to 4 |
2 1/2 & 3 to 6 |
| 1/2 |
0.502 |
0.500 |
0.504 |
0.499 |
|
9/16 |
7/8 |
17/32 |
0.4 |
1/16 |
|
2 to 6 |
2 1/2 & 3 to 6 1/2 |
| 5/8 |
0.627 |
0.625 |
0.630 |
0.624 |
|
11/16 |
1 |
21/32 |
0.5 |
1/8 |
|
2 1/2 & 3 to 6 |
4 1/2 to 7 & 8 |
| 3/4 |
0.752 |
0.750 |
0.755 |
0.749 |
|
13/16 |
1 1/4 |
23/32 |
0.5 |
1/8 |
|
3 1/2 to 6 |
4 &. 5 & 6 & 8 |
| 7/8 |
0.877 |
0.875 |
0.880 |
0.874 |
|
15/16 |
1 3/8 |
27/32 |
0.6 |
1/8 |
|
3 1/2 to 6 |
6 & 7 to 8 |
| 1 |
1.003 |
1.000 |
1.007 |
0.999 |
|
1 1/16 |
1 5/8 |
1 1/32 |
0.6 |
1/8 |
|
|
|
| 1 1/4 |
1.253 |
1.250 |
1.257 |
1.249 |
|
1 5/16 |
2 |
1 9/32 |
0.7 |
1/4 |
|
|
|
| 1 1/2 |
1.504 |
1.500 |
1.509 |
1.499 |
|
1 9/16 |
2 1/2 |
1 17/32 |
0.7 |
1/4 |
|
|
|
|
