Single Nut Ball Screws

[Cold Fusion]

First I was going to go with 1/2 acme. After a couple weeks I decided to go with ballscrews. I bought a single nut SKF 10mm system. What kind of accuracy am I to expect with this?

[Al_The_Man]

Typically, if its precision ground the error is around .0005/ft or less . If it is precision rolled, around .004/ft. The thing to watch with a single nut is backlash, The best is a preloaded nut but these put the price up quite a bit.
Al

[Cold Fusion]

http://www.linearmotion.skf.com/Cata...,13955&Lang=EN

It's a non preload rolled. Yes yes, I know this is the lower end of ballscrews, but is it going to have decent precision?

[snoopy]

I actually just got done making a very small first run try at a 3 axis machine. Bearings and screws seemed to work wonderfully. I now have a pair of bearings and screws which may work good for you. They are 37 inch long 1" dia , 4 turns per inch,route

Maybe you would like to take a look . I have posted all the information that I thought I needed to use them. But it was just going to be to big of a project.

Item number: 3804800919

http://cgi.ebay.com/ws/eBayISAPI.dll...tem=3804800919

[Cold Fusion]

Would you be willing to end the auction early? If so, how much would it be including shipping?

[Bloy2004]

I couldn't resist to put my little bid in for these...,

[teilhardo]

Those are nice! Do you have any others that you are offering?

[ger21]

but is it going to have decent precision?

It should be at least as precise as the 1/2-10 acme, but if I'm reading it right, it looks like it has up to .07mm backlash. You don't really want any backlash if you can avoid it.

Gerry

[Cold Fusion]

Well, that's only around 3 thou backlash. I can easily live with that.

[balsaman]

Do not use these screws unless you plan on using LARGE steppers or servos. Also you will need some sort of reduction.

Nice looking lead screws.

E

[Cold Fusion]

Ok, I'll just stick to my single nut Skf ones for now. Thanks!