For ordering ball screws and nuts (Thompson etc.) are there distributors other than MC that quote prices on line?

TRY THIS (http://www.homeshopcnc.com/)

thanks - I contacted them but they don't have anything in the 1" diameter range
dk

Try http://www.roton.com/
They have most of their pricing online.

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Andy

Andy,
Thanks - best prices I've seen so far.
Dennis

Dennis,

Rotons are not of the same quality as Thompson and Nook screws.

Nooks are especially nice... minimal lead error and made from 4140 alloy steel.

I spoke with Roton who doesn't publish specs. on their site, but quoted
.003 to .006 accuracy per foot. This is in the same range as Thompsons published .004"/ft.

I'm mainly looking for repeatability which I can get with well controlled (near zero) backlash.

Are there other factors to be considered. You mentioned 4140 material - does this affect life/wear? Any bad experience with the lower cost Roton?

Is there an online distributor for Nook or do you request a factory quote.
Thanks for everyones input.

dk

dk,

I remember reading from another poster say that the Roton screws they got were much harder to machine journals on, compared to the Thompsons from Mcmaster.
I've also read that for a small fee Roton will replace the balls with over sized balls for little to no backlash if you don't want to double nut.

I don't own any Rotons yet, but at those prices I definitely want to give them a shot. I'm just not sure that I can turn the ends on em.

For any application that you could use a 5/8" screw on, I would definately get the Nook XPR Precision rolled screws from HomeShopCNC.com (0.001"/ft lead error)
Those are supposedly a lot smoother than a regular rolled screw and take to over sized balls a lot better.

Keep us posted on what you decide, and how they work out for ya.

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Andy