Prototek Sheetmetal Fabrication

rapid prototyping of precision machining Prototyping Precision Sheetmetal and Machining

BEND DEDUCTIONS

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