Ball screw specifications Installation direction horizontal vertical Mounting method Fixed/free Fixed/supported Fixed/fixed Ball screw classification Precision ground/Non-preloaded Precision ground/Preloaded Rolled shaft/Non-preloaded Rolled shaft/Preloaded Nut type Nut model number Basic dynamic load rating Ca= N Basic static load rating Coa= N Thread minor diameter d1= mm Ball center-to-center diameter dp= mm