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 |
