pipecrafter
Member
Most of you have probably seen this pen in the show-'n-tell section, but I figured I'd start a new thread here with stuff I learned while making it.
The pen (click for bigger):
That's a berea front section, and while an M10x1 tap made the right sized threads, I used a letter Q drill bit to make the hole, which resulted in the threads being far too tight. I went back in and reamed it out with an 11/32" bit, and the fit is pretty damn good. The next time I do this, I'll just skip right to using that drill size to cut the hole.
The cap threads are single start 1/2"-32. When I was finished yesterday, it took 6 full rotations to seat or remove the cap. Today I modified the cap by drilling out the first three threads, now it seats with only 3 full turns. Ah!! Geometry!! 3 full turns may not be on par with multi-start threads that require one full turn, but IMO, it's pretty good. Unfortunately, a multi-start tap and die are not in the cards for me right now - I simply cannot afford them.
Hopefully these pieces o finfo will help folks out.
The pen (click for bigger):
That's a berea front section, and while an M10x1 tap made the right sized threads, I used a letter Q drill bit to make the hole, which resulted in the threads being far too tight. I went back in and reamed it out with an 11/32" bit, and the fit is pretty damn good. The next time I do this, I'll just skip right to using that drill size to cut the hole.
The cap threads are single start 1/2"-32. When I was finished yesterday, it took 6 full rotations to seat or remove the cap. Today I modified the cap by drilling out the first three threads, now it seats with only 3 full turns. Ah!! Geometry!! 3 full turns may not be on par with multi-start threads that require one full turn, but IMO, it's pretty good. Unfortunately, a multi-start tap and die are not in the cards for me right now - I simply cannot afford them.
Hopefully these pieces o finfo will help folks out.
