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The following information has been tested by Prototek Fabrication and may vary from other manufacturers.
Radius - Internal Radius
Bend Deduction - Amount subtracted per bend (coined/set bends)
Air Bend - Deduction for air bend.
K-Factor - used for engineering programs, such as Pro-E and Solid Works


Colled Rolled Steel - CRS
Thk Radius Bend Deduction Notes Air Bend K-Factor
.018 .030 .034     .5261
.020 .030 .039     .4417
.024 .030 .036   .047 .6599
.030 .015 .047     .4125
.030 .030 .047   .054 .5491
.030 .060 .067     .3979
.030 .187 .122     .3875
.036 .030 .054     .546
.036 .090 .085     .4532
.040 .030 .065     .4437
.040 .060 .075     .4035
.048 .030 .072   .078 .4891
.048 .060 .088     .4477
.048 .090 .101     .4460
.048 .202 .151     .4204
.060 .030 .088   .103 .4762
.060 .045 .095     .4702
.060 .060 .106     .4218
.060 .375 .232      
.060 1.000 .510     .4160
.074 .030 .112   .125 .4318
.090 .030 .131   .147 .4377
.090 .125 .172     .4361
.104 .030 .151     .4277
.120 .030 .180   .205 .3866
.134 .030 .201     .3795
.175 .030 .270      
.178 .015   3/4 DIE .280  
.187 .030 .280 1.50 DIE .318  
.187 .030 - 1.25 DIE .300  
.187 .060 .305     .3226

GALVANNEAL/GALVANIZED STEEL
Thk Radius Bend D. Comments Air Bend K-Factor
.030 .030 .051      
.036 .030 .058      
.048 .030 .076      
.048 .060 .092      
.060 .030 .092      
.060 .060 .110      
.074 .030 .116      
.090 .030 .135      
.104 .030 .155      
.120 .030 .185      
.134 .030 .205      

ALUMINUM
Thk Radius Bend D. Comments Air Bend K-Factor

Offset  GAP  A 




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