Hi Clive, we can supply Class 7 JIS (0.050/300mm) R12x5 ballscrews with zero backlash + ground journals. Please note the spindle hardness is 60 to 64Hrc and can not be machined using conventional tooling (we use ceramic tips) Unlike other soft ballscrew spindles on the market, the additional hardness offers longer life. RSW Ballnut info: http://www.worldofcnc.com/products.asp?recnumber=69 PDF: http://www.worldofcnc.com/images/RSW%20Ballnut.pdf Regards / Kevin Marchant Dice Ltd www.worldofcnc.com
