This video is about the different types of wire strippers out there and what types of wire they work best for. Below are links that you might find helpful. Copper is a scrappers best friend and stripping wire can yeild a worthy amount of it. What type of stripper would be best for you?
Check out this link on how to make a milling type stripper:
RBF Products: http://www.rbfproductsinc.com/
TNT Tooling: http://www.tnttooling.com/
Post time: 12-22-2016