Originally Posted by
reg.miller
No , I have both 5mm and 5 tpi, measuring over ten turns is enought to tell the difference. AFAICT, the chinese use 3/8" balls in their 1605 ballscrews. In any case they do not have sufficient manufacturing accuracy so no two balls screws have the same balls. They obvious practice selection on production and hand choose the ball size that gives the best fit. This is annoying because if you loose one ball during cleaning you can not pinch one from another ball screw. I have a5 ballscrews all with slightly different bearing sizes.