1/2" taper rebar drift punch

[metric_taper]

Will you be showing us the nozzles? I have made holdfasts from rebar, but they lose their spring rapidly, and have to be bent again. (I’ve made better since.) I take it, Frank, that you do not intend your punches as drifts, to drive right through material?

Once again, I've hijacked Franks post.


Pretty boring nozzles, just straight sections of 1/2" material, bored out 17/64" nozzle hole, with the 120 degree conical lead in from a larger drill. I heated them to cherry red heat with the O-A torch, and dropped them in a jar of peanut oil that was sitting out in my shop for some unknown reason. I used a piece of welding filler rod, I bent a small dog leg hook on. I let gravity hold the nozzle on the hook, then when up to heat flicked them over the open jar of oil. The hot drops caused the jar to crack, but all of these cooled off. I think I should have used water.
The gun came with the sand blast cabinet.
Top side of gun showing set screws for holding the nozzle, and the air jet that is 1/8" diameter.
This is a real crappy sketch I made of the gun back in 2001 (on a calendar sheet).

I just tested them on my Rockwell hardness tester, C scale they are 64-66 hardness. One was 52, that is now a reject.

[Philip Davies]

Your sketch is perfectly clear. I wasn’t sure at first what you meant.