Re: Off topic? Machining some inserts

> Off topic? Machining some inserts
> Posted by: "Jack McKie" freshwatermodels@... freshwatermodels
> Date: Fri Feb 10, 2012 9:29 am ((PST))
>
> Problem is a combination of things and I think a large part of it is crumy tailstock and crumy worn out jacobs chuck. These mini lathes have dreadful tailstocks. My larger lathe goes too slow to drill the hole. With the aluminum it also may be the stock having some inconsistancies. If it were just one issue I would try to find a work around but I think it is a few issues. I need 500 of these so don't want to get into lots of wasted stock.
>

It sounds like you are trying to use stock of the finished size to make
your part. That would require very clean stock and a very good collet to
hold it.

If you wants concentric parts you ought to use stock large enough so you
can make a finish cut to diameter, then do the drill operation, starting
with a center drill then a very short stub drill.

I dont think nay machine can take common 1/4" rod and get concentric
parts like this.

ron ginger