PORTLAND AREA (503) 678-5525 TOLL FREE (877) 678-5525

Forming

Capabilities

    • (2) TruBend 5320
    • 360 Ton
Our industrial forming department is second to none. Equipped with two 360 ton press brakes, we're prepared for any bending job you send our way. Our ISO-certified processes ensure that your parts are produced with precision. GK has invested heavily in state-of-the-art machines to handle large industrial sized jobs, large volume parts and pieces as well as small, delicate cutting projects. We have the capacity and capabilities to provide quality, on-time delivery for your next manufacturing project.

Trumpf Press Brakes

Forming Tolerance

For parts 36" x 36" or smaller. For larger parts, add 0.002"/foot.

THICKNESS + / -
18ga - 12ga 1/32
3/16 - 1/2 1/16
5/8+ 3/32

Angular = +/- 1 degree

* Tolerance listed is per bend. Standard tolerances are listed, tighter is attainable with sample pieces for tuning.

Minimum Guidelines

Bend table minimum guidelines chart is for steel (A36) up to a 90* single bend ONLY. See notes below for other bends or alternate materials. Standard radius is equal to material thickness.

MATERIAL THICKNESS 8X THK STANDARD DIE WIDTH MIN ENTITY TO BEND MIN FLANGE LENGTH LONGEST BEND MAX DEGREE K FACTOR MS/SS
(.048)18 ga 0.38 0.384" (10MM) 0.281 0.317 159* 35 OR HEM 0.156 / 0.065
(.060)16 ga 0.48 0.384" (10MM) 0.281 0.317 159* 35 OR HEM 0.400 / 0.283
(.075)14 ga 0.60 0.472" (12MM) 0.332 0.361 159* 35 OR HEM 0.300 / 0.225
(.105)12 ga 0.84 5/8" (16MM) 0.406 0.440 159* 35 OR HEM 0.380 / 0.350
(.120)11 ga 0.96 5/8" (16MM) 0.406 0.440 159* 35 OR HEM 0.315 / 0.380
(.135)10 ga 1.08 5/8" (16MM) 0.406 0.440 159* 35 OR HEM 0.350 / 0.355
.188 Plate 1.50 1" (30MM) 0.850 0.875* 172 35 0.415 / 0.328
.250 Plate 2.00 2" (50MM) 1.250 1.375 172 35 0.350 / 0.342
.313 Plate 2.50 2" (50MM) 1.250 1.375 159 35 0.335 / 0.328
.375 Plate 3.00 3" (70MM) 1.690 1.875 159 35 0.362 / 0.3145
.500 Plate 4.00 4" (100MM) 2.250 2.500 90 35 0.300 / 0.300
.625 Plate 5.00 6" (150MM) 3.250 3.750 80 35 0.285 / 0.286
.750 Plate 6.00 6" (150MM) 3.250 3.750 80 35 0.265 / 0.265
1.00 Plate 8.00 6" (150MM) 3.500 4.000 80 35 0.235 / NA

5052 AL K Factors

THICKNESS K Factor
0.0478 0.135
0.063 0.500
0.080 0.410
0.100 0.485
0.125 0.500
0.188 0.415
0.250 0.345
0.313 0.328
0.375 0.3135

Radius Punches Available

Size Length
0.375 R 78.75
0.500 R 98.50
0.750 R 78.75
1.000 R 95.50
1.500 R 78.75

Additional Information

  • Can Hem up to 10ga Sheet at 159.5" long due to available dies.
  • Die bed is 174" and is 145" between the uprights
  • Max flange at upright 16"
  • Max interior box ID = 5" or 10" with extensions
  • Minimum distance a punched "dimple" can be from a bend line is 1.75" (10 ga max for dimples)
  • Minimum flanges must be increased for bends that are over 90', or for Z-bends.
  • When radius exceeds 6x material thickness, change K factor to .500 for more accurate bends.
  • Limited by tooling, not machine tonnage.
Phone: (877) 678-5525 | 10590 Donald Road NE | PO Box 427 | Donald, Oregon 97020-0427 email facebook googleplus youtube linkedin Copyright © GK Machine Inc. All Rights Reserved.