08-02-2013, 04:14 PM
How do you guys figure out the TPI you need to use when you need a specific length with a specific number of coils? I need to make one of these:
Quote:Spring length - .675"
Spring EXT. Diameter - .15"
Spring INT. Diameter - .08"
1/16" drill bit mandrel
10 coils of .032" wire
Willie