Diving Doug
Plastic
- Joined
- Mar 29, 2017
While I am not a professional machinist, I have been around in my years but I came across an end mill that I have never seen before. As seen in the photos, this is a three flute bit with the main section of the cutting edges ground with a downward helix while the bottom 3/16" or so is ground with a traditional upward helix. Both cutting edges are cutting in a normal clockwise direction and because of the way it's ground, the cutting edges overlap a bit.
It looks like a factory grind as I don't think you could modify an existing end mill to this configuration. If it was originally a full downward cutting helix, the relief grind would not allow for the short bottom cutting edges to exist.
It appears to be solid carbide and maybe has some cobalt added. It's much heavier that HSS (relatively speaking)
Just curious if anyone has ever seen this before and what it would be used for.
It looks like a factory grind as I don't think you could modify an existing end mill to this configuration. If it was originally a full downward cutting helix, the relief grind would not allow for the short bottom cutting edges to exist.
It appears to be solid carbide and maybe has some cobalt added. It's much heavier that HSS (relatively speaking)
Just curious if anyone has ever seen this before and what it would be used for.
