If you can lay your hands on a copy of the Zeus Engineers data book, there are diagrams showing how to calculate bends.
RonA
Put up a drawing/sketch of what you want to do.
As above though, rough rull of thumb is work on the inside sizes.
So for a 50 x 100 channel in 3mm, youd add 47+94+47. When its folded (assuming a 1/2mm ish rad) it will gain a material thickness each way, per fold. The 47mm will gain a 3mm thickness, making it 50, and the 94 will gain 3mm at each side, making 100.
If you increase to a large radius, you need less material. The distance around a 100mm circle is 314.2mm...
If you decrease to very sharp fold, you need more material. The distance around a 100mm square is 400mm
Now imagine each fold as a quarter of a circle or quarter of a square, and you will see the difference in material needed.
This thread has a bit on it too...
Thanks Hitch, what I'm intended on doing is a lot more involved than that, I'm trying to work out how long a strip of 1mm steel 38 mm wide I would need to go all around the contours of a Fender Telecaster guitar, I've a mind just to cut that width of strip from the long side of an 8x4 or whatever size they are now and wrap it around my former.
Are you getting the fronts and backs lasered? If you have a DXF/DWG of the shape, you should easily be able to pull the perimeter from that.
If youre fabricating them, a few sparks wont be an issue when it comes to trimming the end... and discrepancy will be welded up anyway, or easily lost when you tack it together.
Those are Descaco grips and I've owned them since about 1978, must have been someone else that bought yours.
If youre doing them by hand then, the strip is best left slightly long to accomodate decrepancies with cutting by hand i'd say.
It was a member called CandorThey are excellent grips, so adjustable, you're probably right about selling to some else, I know it was someone on the forum.
It was a member called Candor