kcoaks,
I used McMaster-Carr for my lead screws: Precision-Modified
Acme, 303 stainless, 1/2" dia, 10 pitch, 2-start, 5 TPI, 48" L
MC Part#: 6350 K22, $128.43, unmachined. The Wear-
Compensating Nut: #6350 K62, $32.73
I chose the 1/2" diameter lead to fit through the head stock of
my lathe so I could turn the ends for bearings and couplings.
I guess I could have used a larger diameter lead and made an
end adapter for the ends. This way the lathe was not the bottle-
neck. I think one needs to use a good grade of lead screw & nut
if accuracy is the goal.
The linear bearings and shafts were bought via eBay auction
items that had bearings, shafts & stepper motors. The auction
prices were from $100-$200 and I got all of the bearings, etc.
in two buys.
Good luck on your project, Harley |