BS 46 :1958 Parallel Keys and Keyway Dimensions (square)

BS 46 Square Keys and keyway Dimensions

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

BS 46 Part 1 : 1958 Square Keys and keyway Dimensions

all dimensions in inches

Shaft Diameter		Width Height		Keyway (Shaft					Keyway (Hub)				Radius r
				W		H			W		h
Over	To/Inc	W & T		Min	Max	Max	Min		Min	Max	Min	Max
1/4	1/2	1/8		0.124	0.125	0.072	0.078		0.125	0.126	0.060	0.066	0.010
1/2	3/4	3/16		0.187	0.188	0.107	0.113		0.188	0.189	0.088	0.094	0.010
3/4	1	1/4		0.249	0.250	0.142	0.148		0.250	0.251	0.115	0.121	0.010
1	1 1/4	5/16		0.311	0.312	0.177	0.183		0.312	0.313	0.142	0.148	0.010
1 1/4	1 1/2	3/8		0.374	0.375	0.213	0.219		0.375	0.376	0.169	0.175	0.010
1 1/2	1 3/4	7/16		0.437	0.438	0.248	0.254		0.438	0.439	0.197	0.203	0.020
1 3/4	2	1/2		0.499	0.500	0.283	0.289		0.500	0.501	0.224	0.230	0.020
2	2 1/2	5/8		0.624	0.625	0.354	0.36		0.625	0.626	0.278	0.284	0.020
2 1/2	3	3/4		0.749	0.750	0.424	0.43		0.750	0.751	0.333	0.339	0.020
3	3 1/2	7/8		0.874	0.875	0.495	0.501		0.875	0.876	0.387	0.393	0.062
3 1/2	4	1		0.999	1.000	0.566	0.572		1.000	1.001	0.442	0.448	0.062
4	5	1 1/4		1.248	1.250	0.707	0.713		1.250	1.252	0.551	0.557	0.062
5	6	1 1/2		1.498	1.500	0.848	0.854		1.500	1.502	0.661	0.667	0.062

BS 46 Part 1 : 1958 Square Key Dimensions

all dimensions in inches

Width/ Height	W & T			Pref. Length
W &T	Max	Min		From	To
1/8	0.127	0.125		3/4	1
3/16	0.190	0.188		3/4	2
1/4	0.252	0.250		3/4	3
5/16	0.314	0.312		3/4	3
3/8	0.377	0.375		1	4
7/16	0.440	0.438		1 1/2	4
1/2	0.502	0.500		2 1/2	5
5/8	0.627	0.625		2 1/2	6
3/4	0.752	0.750		3 1/2	6
7/8	0.877	0.875		3 1/2	6
1	1.003	1.000
1 1/4	1.253	1.250
1 1/2	1.504	1.500

�