SELECT SHAFT DIAMETER FROM ALLOWABLE STRESS
(4000-8500 PSI)
Shaft
Shaft
Shaft
Shaft
Shaft
Torque
Stress
Diameter
Stress
Diameter
Stress
Diameter
Stress
Diameter
Stress
Diameter
in-lbs
PSI
Inches
PSI
Inches
PSI
Inches
PSI
Inches
PSI
Inches
1,000
4,000
1.08
5,000
1.01
6,000
0.95
7,000
0.90
8,000
0.86
2,000
4,000
1.37
5,000
1.27
6,000
1.19
7,000
1.13
8,000
1.08
3,000
4,000
1.56
5,000
1.45
6,000
1.37
7,000
1.30
8,000
1.24
4,000
4,000
1.72
5,000
1.60
6,000
1.50
7,000
1.43
8,000
1.37
5,000
4,000
1.85
5,000
1.72
6,000
1.62
7,000
1.54
8,000
1.47
6,000
4,000
1.97
5,000
1.83
6,000
1.72
7,000
1.63
8,000
1.56
7,000
4,000
2.07
5,000
1.92
6,000
1.81
7,000
1.72
8,000
1.65
8,000
4,000
2.17
5,000
2.01
6,000
1.89
7,000
1.80
8,000
1.72
9,000
4,000
2.25
5,000
2.09
6,000
1.97
7,000
1.87
8,000
1.79
10,000
4,000
2.34
5,000
2.17
6,000
2.04
7,000
1.94
8,000
1.85
15,000
4,000
2.67
5,000
2.48
6,000
2.34
7,000
2.22
8,000
2.12
20,000
4,000
2.94
5,000
2.73
6,000
2.57
7,000
2.44
8,000
2.34
25,000
4,000
3.17
5,000
2.94
6,000
2.77
7,000
2.63
8,000
2.52
30,000
4,000
3.37
5,000
3.13
6,000
2.94
7,000
2.79
8,000
2.67
35,000
4,000
3.55
5,000
3.29
6,000
3.10
7,000
2.94
8,000
2.81
40,000
4,000
3.71
5,000
3.44
6,000
3.24
7,000
3.08
8,000
2.94
45,000
4,000
3.86
5,000
3.58
6,000
3.37
7,000
3.20
8,000
3.06
50,000
4,000
3.99
5,000
3.71
6,000
3.49
7,000
3.31
8,000
3.17
55,000
4,000
4.12
5,000
3.83
6,000
3.60
7,000
3.42
8,000
3.27
60,000
4,000
4.24
5,000
3.94
6,000
3.71
7,000
3.52
8,000
3.37
65,000
4,000
4.36
5,000
4.05
6,000
3.81
7,000
3.62
8,000
3.46
70,000
4,000
4.47
5,000
4.15
6,000
3.90
7,000
3.71
8,000
3.55
75,000
4,000
4.57
5,000
4.24
6,000
3.99
7,000
3.79
8,000
3.63
80,000
4,000
4.67
5,000
4.34
6,000
4.08
7,000
3.88
8,000
3.71
85,000
4,000
4.77
5,000
4.42
6,000
4.16
7,000
3.95
8,000
3.78
90,000
4,000
4.86
5,000
4.51
6,000
4.24
7,000
4.03
8,000
3.86
95,000
4,000
4.95
5,000
4.59
6,000
4.32
7,000
4.10
8,000
3.93
100,000
4,000
5.03
5,000
4.67
6,000
4.39
7,000
4.17
8,000
3.99
125,000
4,000
5.42
5,000
5.03
6,000
4.73
7,000
4.50
8,000
4.30
150,000
4,000
5.76
5,000
5.35
6,000
5.03
7,000
4.78
8,000
4.57
175,000
4,000
6.06
5,000
5.63
6,000
5.30
7,000
5.03
8,000
4.81
200,000
4,000
6.34
5,000
5.88
6,000
5.54
7,000
5.26
8,000
5.03
225,000
4,000
6.59
5,000
6.12
6,000
5.76
7,000
5.47
8,000
5.23
250,000
4,000
6.83
5,000
6.34
6,000
5.96
7,000
5.67
8,000
5.42
275,000
4,000
7.05
5,000
6.54
6,000
6.16
7,000
5.85
8,000
5.59
300,000
4,000
7.26
5,000
6.74
6,000
6.34
7,000
6.02
8,000
5.76
325,000
4,000
7.45
5,000
6.92
6,000
6.51
7,000
6.18
8,000
5.91
350,000
4,000
7.64
5,000
7.09
6,000
6.67
7,000
6.34
8,000
6.06
375,000
4,000
7.82
5,000
7.26
6,000
6.83
7,000
6.49
8,000
6.20
400,000
4,000
7.99
5,000
7.41
6,000
6.98
7,000
6.63
8,000
6.34
425,000
4,000
8.15
5,000
7.56
6,000
7.12
7,000
6.76
8,000
6.47
450,000
4,000
8.31
5,000
7.71
6,000
7.26
7,000
6.89
8,000
6.59
475,000
4,000
8.46
5,000
7.85
6,000
7.39
7,000
7.02
8,000
6.71
500,000
4,000
8.60
5,000
7.99
6,000
7.51
7,000
7.14
8,000
6.83