ANSI and SAE Shafts
Keyed Shafts
Shaft Code	Shaft Diam	Short Shaft Lngth	Long Shaft Lngth	Key Width	SAE Ref
13-1	0.500	0.750	na	.125	na
16-1	.625	.938	2.000	.156	A
22-1	.875	1.312	2.500	.250	B
25-1	1.000	1.500	2.750	.250	na
32-1	1.250	1.875	3.000	.312	C
38-1	1.500	2.125	3.250	.375	na
44-1	1.750	2.625	3.625	.437	D,E
Splined Shafts
Shaft Code	Shaft Diam	Shaft Length	Spline Spec		SAE Ref
13-4	1/2	.750	9T, 20/40 DP		na
16-4	5/8	.938	9T, 16/32 DP		A
22-4	7/8	1.312	13T, 16/32 DP		B
25-4	1"	1.500	15T, 16/32 DP		na
32-4	1 1/4	1.875	14T, 12/24 DP		C
38-4	1 1/2	2.125	17T, 12/24 DP		na
44-4	1 3/4	2.625	13T, 8/16 DP		D,E
50-4	2"	3.125	15T, 8/16 DP		na
Straight Shafts With Threads
Shaft Code	Shaft Diam	Str Shaft Length	Thread Size	Thread Length	Key Width
13-2	.500	.750	3/8-24	.562	.125
16-2	.625	.938	1/2-20	.719	.156
22-2	.875	1.312	5/8-18	.906	.250
25-2	1.000	1.500	3/4-16	1.062	.250
32-2	1.250	1.875	1"-12	1.219	.312
38-2	1.500	2.125	1 1/8-12	1.375	.375
44-2	1.750	2.625	1 1/4-12	1.562	.437
Tapered Shafts With Threads
Shaft Code	Shaft Diam	Tprd Shaft Lgth	Thrd Shaft Lgth	Thread Size	Key Width
13-3	.500	.688	.500	5/16-32	.125
16-3	.625	.688	.719	1/2-20	.156
22-3	.875	1.125	.906	5/8-18	.250
25-3	1.000	1.375	1.062	3/4-16	.250
32-3	1.250	1.375	1.219	1"-12	.312
38-3	1.500	1.875	1.375	1 1/8-12	.375
44-3	1.750	2.125	1.562	1 1/4-12	.437
50-3	2.000	2.875	1.562	1 1/4-12	.500