Mini mill fly cutter. 18:26 video:
https://www.youtube.com/watch?v=m9vNNWzIBTc
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Mini mill fly cutter. 18:26 video:
https://www.youtube.com/watch?v=m9vNNWzIBTc
Fly cutters are my favorite form tool when applicable. Few can hand grind 2 or more equal cutting edges on an endmill.
Careful planning and work will blend intersecting surfaces (fillet) with a undetectable lap or toolmarks.
And size? From Attachment 44122 to Attachment 44123
That's about limit I'll test my or a knee mill's limits. Little one 1/2" shank, larger is R8, with an aluminum body to alleviate rotational mass.
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Just yesterday (compared to 03:08 am) the larger fly cutter was employed as a boring tool, on a stainless plate 3/8" thick x 28" square in Bridgeport. The cutter was stepped out by hand for hole to 8-1/2". In cases like this, (mainly poor clamping) the feed mechanism wasn't used. Locked the quill in uppermost position, and fed the work manually with the knee, lowering to re-set cutter, and thus proceeded until reaching size.
There is no "break even" spot between fly cutting and face milling. One is the other on steroids, or a diet. As you said "right set up, right machine...". Weak link is the setup, which condition of the cutter is a factor.
BTW; the little guy helped out on https://www.homemadetools.net/forum/...uck-saga-93697 creating a spotface for grommet of the light mounting, the smooth finish aids with less friction or tearing. Main reason, removing the bead where the base and sides meet.
My 75 year old tool and die maker friend has at least 4 smaller sizes and a few great big mother hooters like yours. He has and uses end mills a lot. But where he can use a flycutter which is most places that's what he uses. His simple point is paying for the cutters is not cheap. The flycutters are. Broken endmills make great flycutter bits to. I learn a lot from a few of you guys. It's appreciated.