10-08-2015, 10:35 AM
OK, you guys have convinced me. The next time I need to tap some through holes, I will buy individual, made in USA, spiral point taps, and do it under power, like Tom does.
I see in Enco that there are a lot of choices, even within those parameters. I want a 5/16-18, to tap 3/4 inch aluminum. (I'm going to try Tom's clamp-type knurler.)
So, what would be the recommendation? They have a Hertel H-3, bright finish for around $4.50. All of the others seem to be more. Is this a decent tap for general purpose use? Do I need the higher tolerance or coated tops for non-production work? Would it make sense to pick up the other basic sizes at the same time?
I see in Enco that there are a lot of choices, even within those parameters. I want a 5/16-18, to tap 3/4 inch aluminum. (I'm going to try Tom's clamp-type knurler.)
So, what would be the recommendation? They have a Hertel H-3, bright finish for around $4.50. All of the others seem to be more. Is this a decent tap for general purpose use? Do I need the higher tolerance or coated tops for non-production work? Would it make sense to pick up the other basic sizes at the same time?
Mike
SB 10K (1976) Rockwell vertical mill (1967) Rockwell 17" drill press (1946) Me (1949)
SB 10K (1976) Rockwell vertical mill (1967) Rockwell 17" drill press (1946) Me (1949)