FGarbrecht
Member
I want to try to make a thread cutting tool to cut flat bottom threads in wood (pen caps and barrels). It seems like a simple project; as in the attached picture it would have a 1/4" shank for the 1/4" collet chuck, a short length of 1/8" shaft for clearance depth, and then the single (or double) wing cutter section that sticks up 1/8". Question is how to size dimension 'A', the length of the cutting blade?
Here's what I am thinking. If I want to create 10 tpi symmetrical threads (threads and grooves between the threads equal), then the thread pitch is 0.1 inch, and it seems like having the cutter size the same as thread pitch will create grooves and threads the theoretically correct size and spacing, but do I need to build in some slop?
Here's what I am thinking. If I want to create 10 tpi symmetrical threads (threads and grooves between the threads equal), then the thread pitch is 0.1 inch, and it seems like having the cutter size the same as thread pitch will create grooves and threads the theoretically correct size and spacing, but do I need to build in some slop?