The Craftmans Shop > New from Old
The Sequel - Oh Blimey I bought a CNC Lathe (Beaver TC 20)
awemawson:
I'm tempted to make a 'D-Bit' to a 12.5 degree taper. The real problem is that the 'root' of the gash at the inner (narrow) end is only 2 mm wide, so any cutter will be fairly delicate.
The alternative but slightly more complicated way is to make a tapered slitting saw which would be more robust.
As a compromise I could make the protrusions slightly shorter radially thus increasing the gash root width.
. . . all suggestions welcome :clap:
. . . of course a 3D printer that prints in Bronze would work nicely :ddb:
nrml:
Can't you cast one in bronze or brass from a 3d print and do the fettle to final fit on manual machines and hand tools?
WeldingRod:
Can you post a picture of the mating end? I really wonder how it was made!
You could clearly 3d metal print them, probably under $100 each. Ideally key them to a stub shaft to save print volume and $$
Sent from my SAMSUNG-SM-G891A using Tapatalk
AdeV:
--- Quote from: WeldingRod on November 17, 2018, 06:55:58 PM --- I really wonder how it was made!
--- End quote ---
I'd bet they're die cast. Not sure if they're machined afterwards, it would seem unnecessary, as the actual part-to-part wear would be minimal, since the parts aren't moving against each other once engaged; and having a super-precision fit isn't necessary.
chipenter:
Tilt the rotab over 12.5 degrees and use a slitting saw .
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