POWER CORRECTION FACTORS FOR ARC OF CONTACT

D-d/C
Arc of Contact on Smaller Pulley (Degrees)
Correction Factor i.e. Proportion of 180º Rating
0.00
180
1.00
0.05
177
0.99
0.10
174
0.99
0.15
171
0.98
0.20
169
0.97
0.25
166
0.97
0.30
163
0.96
0.35
160
0.95
0.40
157
0.94
0.45
154
0.93
0.50
151
0.93
0.55
148
0.92
0.60
145
0.91
0.65
142
0.90
0.70
139
0.89
0.75
136
0.88
0.80
133
0.87
0.85
130
0.86
0.90
127
0.85
0.95
123
0.83
1.00
120
0.82