I have a 1/2" bolt that I need to do 2 things to the end of the bolt.
I need to drill a .125 hole in the middle for about a half-inch and turn
the end down to .39, the bolt itself is 2.5 long and 1/2" diameter.
I tried chucking it up in my 3 jaw chuck and I can't get tightened
down without wobbling all over and the hole I need to drill would not
end up in the middle of the bolt, also the turned down part would never
be right. I have tried quite a few different things to get tightened
down without wobbling all without success. The lathe (shoptask
bridgemill) came with a 4 jaw chuck that i never installed, would that
help ? I am at the point where I am thinking of cutting off the bolt
head, doing the machining and then welding the bolt head back on.
This is non-critical part, so not worried about strength, just needs
to be finger tight when installed but that .39 x .450 long machined end
with the hold is critical to fit.
I am NOT a machinist by any stretch of the imagination, I bought this
shoptask 5 years ago and only used it once so far, I had a old sherline
mini lathe that was way under powered for what I did with it and I used
a lot so I decided with a bigger lathe I would get to do more things...I
was wrong. I don't know what I am doing and sometimes too scared to try
and mess up my parts.
But I am getting to the point in my current project where I can see
use for this thing. I have a plate that I need to mill down and instead
of taking it to a shop to have it done, I am going to try it on my own,
its just a carburetor spacer, nothing critical measurement wise. If I
mess it up, its only a $20 part that I can buy, so I will try it out.
Once I get past this bolt thing...
mike
--
A gun is like a parachute, if you need one but don't have it,
you'll probably never need one again.
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