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d.dixson wrote:
wrote:
Hello,

First of all, I have an Acra (now Enco?) 9x20 Chinese bench lathe.
This lathe was given to me by a friend a few weeks ago and it didn't
get much use at all from him.

For some reason the thread cutting system seems way off. When I cut
one pass (say 16tpi) and measure the light cut with my thread guage,
I'm getting closer to a 17tpi cut. When I try to do a 26 tpi pass I
get closer to a 28tpi cut. I've checked and rechecked all of the gear
combinations listed on the chart and the are correct.

Additionally, when I try to use the thread chasing dial, I can never
get the same cutting pass. For example, I'll use strictly the number
1 on the dial and my second cutting pass will be right in between the
first cutting pass. I'll try it for a third pass and I'll get a whole
different cutting pass.

This is really frusterating! Has anybody ever heard of this before? I
was actually impressed with the quality of this Chinese
manufacturing, but now I'm beginning to wonder...

If pictures would help at all I'd be glad to take a few and post
them.

Thank you very much,
Carter

Are you driving through the half-nuts or incorrectly using the longditudinal
clutch?

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