On Friday 11 January 2013 20:02:12 Ben Potter did opine:
Message additions Copyright Friday 11 January 2013 by Gene Heskett

> > Unforch, it doesn't appear they want any business from my side of the
> > pond, no links to individual products at all, and a very limited web
> > page, looks like a line card from a distributer for me.
> > 
> > And, while those are better prices, one would need one on each side of
> > the nut, which puts that at about the same as the cost of the screw.
> > I'll cobble up something before I make swarf with it though.
> 
> Welcome to the UK. Industrial supplies that do have prices online tend
> to be daylight robbery with violence. For example, looking at online
> prices only; black mild steel costs ~5 times as much as bright machined
> aluminium. A lot of companies won't respond to e-mail, or if they do,
> it's to request a phone call. Other companies will ignore phone calls,
> but reply to e-mails. *mutter*
> 
> That said, my lathe (which has sealed ballscrew bearings) has telescopic
> springs on half of the Z axis, with the X axis being enclosed. The other
> half *should* have a spring cover, but since it was broken I left it
> alone. This has not resulted in any problems yet. Turning has been
> limited to fairly soft materials though, so no sparks from CBN inserts.
> 
> The mill has a sheet of PU over the ways, which does a surprisingly
> effective job, I appreciate this doesn't work on lathes - but I can't
> see any mention of the type of machine you're using at the moment.
> 
> Cheers
> Ben

7x12 lathe with 8x2.5mm ball screw fairly well covered for the X crossfeed, 
motor on the rear. Z motor on the left, 2/1 gear between motor and OEM 16 
tpi 3/4" screw ATM.  This is the screw being discussed.

HF micro-mill with expansion tables from LMS, home made Z drive, some early 
pix of it on my web page. Std (but longer) screws on x&y.  Lotta miles on 
it.  Plastic spur cut gears in gearbox have been totaled a couple times 
now.

Anything I left out, just yell Ben.

Thanks.

Cheers, Gene
-- 
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