Anti-Backlash Precision Class C7 Rolled Ball Screw CNC Router Mill Plasma Laser Lathe & Automation Machines. Price include ball screw & Ball Nut, Ball screw in full threaded length no end shafts.Ball Screw Specifications 20mm diameter, 39 Length, 5mm pitch Including ball nut with retainer. In Case you need Loaded nut let us know we will Load it for you. The item "Ball Screw 51 Length Ball nut Z axis CNC KIT Router Mill Lathe Plasma Laser" is in sale since Thursday, July 13, 2017. This item is in the category "Business & Industrial\CNC, Metalworking & Manufacturing\Woodworking Tools & Supplies\Equipment & Machinery\Routers". The seller is "motiontek_ca" and is located in Newmarket, Ontario. This item can be shipped to United States, Canada.