Re: 1720XMTC shoptask z axis Ballscrews

Happy to hear that you were able to buy that Z axis rig for a shoptask from Skip. One minor correction. The threads on the ball nut are 15/16" 16 threads. I know I have made dozens of them . Chuck borrowed my tap to tap them. The bore for the 15/16"-16 is .875 or 7/8"

Dan Mauch
dmauch@...
www.camtronics-cnc.com
Gecko stepper and servo systems. Kits
and assembled unit.

> Photo link:
> http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/photos/album/1886719219/pic/1656316055/view?picmode=&mode=tn&order=ordinal&start=1&count=20&dir=asc
>
> reference photo listed as "Driven ball-nut closeup"
> Chuck used a piece of 1"x2" approx. round stock, drilled for the ball-screw to pass through. He then drilled and tapped one end of the rod to 7/8 x 16 for the ball-nut to screw into. He bored the 42 tooth XL pulley on top to a 1" light press fit.