Acme Threads

[TomG]

(09-27-2012, 05:53 AM)EdK Wrote:

(09-26-2012, 09:20 PM)TomG Wrote: Cutting Acme threads is pretty much the same as cutting Unified threads . The only real difference is that the compound is set to 14 1/2º instead of 30º and you can't take as deep a cut because there is more of the tool in contact with the work. If you can cut a Unified thread you can cut an Acme thread, there's nothing magic about it.

Tom

I think I've read that with acme threads you feed straight in rather than at an angle like you do with a Unified thread. Is that true?

Ed

Nope. The angle of the compound is just different, 14 1/2º instead of 30º. Square threads are fed straight in and those are a pain to cut. Sort of like parting with a twist.

Tom