K-Factor and Inner Bend Radius Chart

K-factor and inner bend radius by material and thickness, CalWest Manufacturing
Plate ThicknessMaterialInner Bend RadiusK-Factor
.03 - .125 inSteel, Stainless, Aluminum.0775 in0.4
.134 - .250 inSteel, Stainless, Aluminum.155 in0.4
.3125 - .500 inSteel, Stainless, Aluminum.250 in0.4

⚠ Important! ⚠

The table above provides simplified average values across materials and thicknesses, as small variations due to material heat lot changes would make precise charting inaccurate. Using these values will get your model close to the expected results, and we can further refine it in our software for precise adjustments. To ensure accuracy, avoid placing features too close to bends to prevent distortion, and make sure there is enough material to keep it from slipping off the bottom die during bending.