I have a few "Ace" taps made by Hanson. (large sizes, 5/8 to 7/8
NC). They do not say "HS" or "HSS" on them. They may be either high
carbon steel taps, or perhaps they are HSS. Is there some easy test,
like scratching them wiht a known high speed steel tool, that would
let me tell. Thanks.
i
- posted
15 years ago