#001

[@farazahmed9247]

Great video. Thanks for sharing!

[@pauldelvechio5614]

Great Video, thank you for sharing!

[@biryaniofbodyhair]

Thanks for doing this, i couldn't remember how to actually calculate it out from my apprenticeship I'd just do a test piece and set a back stop to repeat! Every other video i found is measured in American so was great to have this pop up

[@itsverygreen532]

A good rule of thumb when bending steel is die at 8 times the material thickness, bend on the internal dimensions ... not perfect, but gets you pretty damn close!

[@billshiff2060]

Good stuff but you didn't verify the inside and outside radius. What did it end up as? I'd like to see a demonstration of how the radius varies with V die width using the same material and punch.

[@AllTheFasteners]

@@billshiff2060 Thanks. I did actually measure the inside radius but I couldn't get the camera to focus well so I didn't include it. The nearest radius gauges I had were 2.5mm and 4.5mm (outside) - they were both very close. I am planning on another video to test k factor for other materials (1mm steel, 8mm steel and 2mm aluminium) - I will do some different vee widths in that one too. The formula based on dividing by six came from an early 1980's manual for an Amada press brake.

[@billshiff2060]

@@AllTheFasteners From what I see the K factor is pretty stable for aluminums and steels BUT I did see soft stainless drop to an astonishing .3 (that rendered all our blanks that were made for K= .45 scrap as it was impossible to get the rads and flanges correct)