[jjwl89]

I was wondering how much accuracy is possible with rolled 5/8" ballscrews? Could they be accurate to .005"?

[sendkeys]

[starCNC]

[i]
p.s might think about making your own "preloaded nuts" with two cheaper normal nuts. [/B]

Can you show me how to make the preloaded?

[sendkeys]

[replicapro]

I got my ball scews from http://www.mcmaster.com/ for $1.09 per inch

I used their ball nuts $21.04 each to make a loaded ball nut using Dan's method from Camtronics.


Instead of turning down the ball nuts he added a coupler

Then simply put it on the end of the ball screw

[Chagrin]

That requires a bit of magic to internally thread those couplers to match the ballscrew, doesn't it?

[jjwl89]

How about ballscrews from Roton. Has any one used these before? How do they preform? http://roton.com/web/balls.jsp

[replicapro]

No Dan said to use set screws

My thought is to use a shear pin.

[Bubba]

I am presently seting up a system using the ball screws from Roton. I have received them and they loolk good. The packaging was supurb and the e-mails that I have had with them has given good me a good feeling. they have been very responsive to my questions and the order was made and recieved in good time.
Right now, I am still making pieces parts for the assembly and will probably start on the actual machining of the lead screw next week/

Bubba

[IJ.]

Originally posted by replicapro
No Dan said to use set screws

My thought is to use a shear pin.

How are you going to drill through the ballscrew?

[replicapro]

The shear pin is an oval bar that gets inserted into a milled out section

[IJ.]

Ahh with ya now!!

I was thinking a shear pin across the ballscrew and couldn't imagine how to break the surface to drill the hole!

[jjwl89]

Is any one familiar with Nook Industries's ball screw bearing supports? They call them EZZE-MOUNTs. If I were to use those on a router, with direct drive, would I need just 1 on the side opposing the motors? If I went with a belt drive, would I need 2, one on each end of the ball screw. Also, which would be better/more practical on a router, Double Angular Contact Bearings or Single Radial Bearings?

All input is greatly appreciated.

[ger21]

Have you checked the price of those things? $$$