Big enough leadscrew

[CnC_BoY]

Hi,

I'm looking for ACME screw and the only goor solution I found for now is 3/8-10 screws (bigger= a lot more expansive. It will be for a 18*12 table (moving table so about 24 in max unsupported span). I just wondered if those screws are big enough not to flex and whip too much. I don't plan to do very rapid work so I wont spin them at 1000 RPM or domething like that. If tou think it will flex too much, what would be an acceptable span?

Thanks a lot

[CnC_BoY]

Also, their anti backlash nuts have a ''Maximum standard preload of 6 lb). Is it enough for my machine. I don't think Dumpster's nuts have more preload than that.

[eman5oh]

Check MSC for keystone Acme screws, they are a lot cheaper than most other places. The 3/8 are IMHO a little on the small side for a 24 inch span, althought they will work.

[HayTay]

ENCO 1/2-10 x 6' ACME Threade Rod for $6.99 + shipping

Check it out! It's where I purchased mine (ACME nuts to match, also). View pictures here: HayTay's ACME rod & nut pictures.

HayTay

[CnC_BoY]

thanks guys, finally I will use 1/2 - 10 with dumpster's nuts