Invariably when I make a cutting tool I create the cutting edge and then spend time carefully trying to relieve the edge without damaging it.
I needed a 35° inc angle reamer, this time I got a bit smarter, cut the reliefs first and then cut the flutes.
This is a piece of 20mm 1020, I've put 6 flats on it much like sharpening a pencil.
I've turned the job 30° in the collet block and cut the flutes.
Harden with cherry red.
The reamer works well, the surface finish is OK for what the part needs to do.
Read the full thread at metalworkforums.com...
I needed a 35° inc angle reamer, this time I got a bit smarter, cut the reliefs first and then cut the flutes.
This is a piece of 20mm 1020, I've put 6 flats on it much like sharpening a pencil.
I've turned the job 30° in the collet block and cut the flutes.
Harden with cherry red.
The reamer works well, the surface finish is OK for what the part needs to do.
Read the full thread at metalworkforums.com...
Pre-relieving cutting edges
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