I was getting a 'soft' cutter and so it would fold over when used.
The problem I think was the reamers were not hot enough nor heated long enough to affect a good treatment.
To get the form I turned it and polished the shape I wanted. Setup in mill dividing head and milled in four flutes. Then slipped it 10 degrees or so and cut a relief leaving a land about 0.050" wide. Hand filed that relief back to leave a margin of say 0.015" and then hardened it. Stoned the cutting lips after hardening but the first attempts pushed over whereas the last attempt held up fine.
I guess I need practice getting it hot enough.
A file of that would help me know what direction to go for better cutters. Yes I would like to get that from you.
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