We Don,t sell Ballscrews Linear Bearings or other transmission products, however for great service and price we recommend

for all premium grade rolled leadscrew products.

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http://www.homeshopcnc.com/

Pricing below as of 12th March 2005

THOMSON PRECISION ROLLED BALLSCREW ROD

Thomson screws are made of high-quality alloy steel hardened to Rc 56-60. Lead accuracy is .004 / ft. Straightness is within .010 / ft and will not deviate more  than .030" for an entire 6 foot length

BALLSCREW PRICING SCHEDULE:

 Thomson Precision Rolled Ballscew Stock- .631 x .2 Pitch            $1.20 / inch

 NOTE: All cutting is free of charge.

 Non-Preloaded Ballnut                                                                       $25/ ea
 Single Nut-Preloaded

(must be loaded to screw by homeshopcnc)                                       $55/ ea
* Contact us for quotes on end machining!

       Please contact our good friend at >> http://www.homeshopcnc.com/

Click Here for >> Ballscrew FAQ

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Ballscrew FAQ:

Q. What's the advantage of a double nut over a preloaded single nut?

A. The two chief advantages are: 1) The preload is adjustable from  light to heavy with a double nut set-up and 2) Over time, wear is likely to occur producing backlash. This can be adjusted out with a double nut whereas a preloaded single nut would have to have the balls replaced.

Q. How much backlash does a standard single nut assembly have?

A. From .001-.004 typically. The variance is due to fluctuation in both the ballnut ID and the ballscrew OD.

Q. There's a kind of crunching going on in my preloaded ballnut assembly. What's wrong?

A. Probably nothing. It's not uncommon for the balls to clutter a bit while passing through the return tube. As long as the elements roll and do not skid, you should be okay.

Q. I have felt zero backlash ballnuts turn on the screw before and they were silky smooth. Your unit is not as smooth, why?

A. There will always be a noticeable difference in feel between a ground ballscrew and a rolled ballscrew. Precision rolled ballscrews when preloaded are not as smooth but are a fraction of the cost.

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Last Modified Friday, September 19, 2008