Bend Deductions

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