So I have my new to me 1945 Dreis Krump Brake, Also known as a Power Leaf Brake, it is rated to bend 10' of 3/16" plate, the clamping head is hydraulic operated and leaf or apron is mechanically done with a series of gears.
So my question is: I've gotten conflicting opinions on how far the head should be set back for the material that I'm bending, most people have said 2 times material thickness, so if I'm bending 1/8" I would set it back 1/4" if thats the case, that seems a bit much to me, Just looking at it I think I could go 1-1/2 times material thickness and be fine.
Or is it on a sliding scale of as the material gets thicker you need to go 2 times material thickness for say 3/16" plate,
This type of brake seems to be a bit obsolete for a brake of this size, so I'm having a problem finding anyone who actually operated one of these relics.
So my question is: I've gotten conflicting opinions on how far the head should be set back for the material that I'm bending, most people have said 2 times material thickness, so if I'm bending 1/8" I would set it back 1/4" if thats the case, that seems a bit much to me, Just looking at it I think I could go 1-1/2 times material thickness and be fine.
Or is it on a sliding scale of as the material gets thicker you need to go 2 times material thickness for say 3/16" plate,
This type of brake seems to be a bit obsolete for a brake of this size, so I'm having a problem finding anyone who actually operated one of these relics.
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