The converter of the rotary movement into a linear movement of the ball bearing and 22 has two speeds of advance, containing such a converter

摘要

Converter of the rotary movement into a linear movement of the ball bearing and 22 has two speeds of advance, containing such a converter. / p & & p & the assembly comprises an endless screw 14 has threads external 16, 16 of the nuts a ball 20, 20 circle diameter hafted on the screw 14, the balls 22, 22 interposed between the screw 14 and the nuts 20, 20 and of the cages 24, 24 maintaining the balls, a turn of the tapping of the nut 20 having a width different of the other turns to pretension the balls lateral to dispose of the play between the nuts and the screw. / p & & p & mechanisms application in particular to the forward movement -, - comes to machines for machining.