In Reply to: Cold bending of polycarb sheet posted by Rod Reynolds on 06/27/00 at 12:38 PM:
We would probably do this job with heat, but it can be tricky avoiding bubbles (predrying the sheet would help alot I believe, although we never do that here). Cold bending will usually leave a break mark where the plastic bunches up in the bend, which may look better or worse than a few bubbles, depends on the application.
Either a large break or hydraulic should work, although the hydraulic type probably doesn't need to be adjusted to fit 3/16th thickness.
Just find a good, open minded shop and good luck!
Greg Facer, Industrial Plastics (glaswood.com)