Live Reviews

Please keep posts short. Email us any full reviews



Bend Deductions

Sheet Metal Bend Deductions


Bend Deductions

The following information has been tested by Prototek® Sheet Metal and may vary from other manufacturers.
Some information is missing, as the exact thickness of the material can vary, or the air temperature plays a large part in the deduction. 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
Thickness 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