The Craftmans Shop > New from Old
The Sequel - Oh Blimey I bought a CNC Lathe (Beaver TC 20)
awemawson:
Today I managed to finish boring the A2-6 taper. I slightly overshot but was able to trim a tad off the outer and lower faces to compensate. That test gauge that I ground proved it's worth.
Quite fiddly getting the taper to seat with just a gnats c.... of clearance on the mounting flange and the correct depthing for the hydraulic O rings to seat was fun, but I got there in the end.
Where the O rings live in the base of the A2-6 taper the seating has been compromised by drilling the M10 tapped holes for the A2-5 chuck, so I will have to make up inserts otherwise the O rings will extrude under pressure.
The adaptor seems to seat nicely on the lathe spindle with just the right amount of 'pull in' on the flange to firmly seat the taper.
So outstanding are three things:
A/ Sort those O ring seats
B/ Turn the A2-5 taper in-situ on the lathe spindle
C/ Drill the dreaded oil way connecting holes :bugeye:
Still I'm pleased with today's progress :ddb:
mattinker:
--- Quote from: awemawson on May 31, 2021, 04:11:24 PM ---Ah but it worked Matthew :lol:
.
--- End quote ---
I never had any problems with solutions that work, I'm all for them!...................
tom osselton:
Nice! I fitted a taper yesterday and overshot as well I think it’s close now I’ll see after the piece cools.
russ57:
I guess it's becoming obvious to the audience why these aren't an off-the-shelf item...
-russ
awemawson:
A few hundred pounds will buy you an A2-6 to A2-5 converter off the shelf, but they don’t connect up the hydraulic oil ports and are too skinny to add them in later.Anyway they are provided hardened so drilling would be neigh on impossible even if there was enough meat in them.
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