Chinese ball nuts & screw on Ebay
Has any body out there used hardware from this outfit.....
http://stores.ebay.com/linearmotionbearings
They advertise their ball screws as C7 and they certainly look ground, from the photos.
I'm curious just how they are getting the "anit-backlash" features in their ball nuts, as their 16mm nuts only measure ~1-3/4" long (with the flange). Is that long enough to get two seperate tracks? Or are they likely just oversizing the balls?
Limited experience here.....
6 Attachment(s)
X2 (chinese) ball screw conversion
Here are the pictures from my X2 mill with Chinese ball screw conversion.
The Y axis (short one) is very easy as the nut fits nicely in place of the original acme nut. The X axis was a bit harder... Had to grind out half of the ball nut flange and gring a 2mm deep recess at the Y carriage. The cast irom from the X2 frame cuts as butter so that is not a big deal, but the ball nut flange ate an entire grinder stone!
Hope it helps.