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David Billington David Billington is offline
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Default Lathe update/questions

Bill Schwab wrote:
Wayne,

I think the 8 TPI screws are a non-issue on a lathe. I find I just
eyeball the cuts until I'm somewhat oversize, then with a digital
caliper
zeroed on the size I want, measure how much more to remove. Thats
when the
dials are used. Of course one lathe has very poor dials with a 5 tpi
crosslide and an 8 tpi topslide, the other lathe is something like 60
thou
per revolution for both.


60 thou!!!! How big is the lathe? What kind of work was it
designed to do?


On a lathe, I don't think you will find that you need to make large
movements on the dials, just small ones. Hope this helps,


It does indeed. To be fair to myself, I am going to look around
again, as well as ask here if anyone knows of 10 tpi machine in the
general size of 12x36. It might be that such a beast does not exist.
Failing an obvious better deal, I expect to keep the machine.
Certainly there is nothing to gain by beating up on Enco and then
buying the same blasted thing from elsewhere.

Both my Kerry 1140 (11" x 40") and Harrison M300 (13" x 40") are 10TPI
machines. The Kerry has the dial marked for radius and the Harrison
diameter although the Harrison is fitted with a DRO so the dial is
rarely used.


Not that I will go this way, what does a DRO on a lathe instrument?
Is it just the carriage and cross travel?

Thanks!

Bill