Abstract: A ball returning circulator of a ball screw having a nut, a screw and a plurality of balls and a circulation device assembled in a ball rolling duct defined by a nut and a screw are provided. The ball returning circulator includes: at least one ball access port, each of the at least one ball access port at one end of the circulator for releasing balls to come into or out from the circulator; and at least one curved section having at least one opening distanced from the ball access port and at least one cover plate for closing the at least one opening.

Abstract: A ball returning circulator of a ball screw having a nut, a screw and a plurality of balls and a circulation device assembled in a ball rolling duct defined by a nut and a screw are provided. The ball returning circulator includes: at least one ball access port, each of the at least one ball access port at one end of the circulator for releasing balls to come into or out from the circulator; and at least one curved section having at least one opening distanced from the ball access port and at least one cover plate for closing the at least one opening.

Abstract: A two-lip dust-proof wiper of a ball screw having a main ring body, with a ringed sheet, and a screwed hole, a circumferential portion and first/second flanged portions. A wiping ring surface is set into the hole. Fine interference fit can be implemented between the wiping ring surface and the periphery of the ball screw. A first wiping lip is annularly formed onto the wiping ring surface for mating with the first flanged portion, and a second wiping lip is annularly formed onto the wiping ring surface for mating with the second flanged portion, such that the first/second wiping lips are protruded at both sides of the surface. The wiping lips and the periphery of ball screw are under interference fit, the interference being larger than that of the wiping ring surface and ball screw. The protruding direction of the wiping lips runs parallel with the flanged portions.