Bend Deductions
The following information has been tested by Prototek Sheet Metal 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
|
| 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 |
|
