Arrangement for centring and securing blades of circular saw

摘要

The blade (1) is gripped between the centring flange (2) and a counterflange (3) which is secured by a nut (5) at the end of a central screw (4) coaxial with the rotary driving shaft (8). The flange (2) is centred by means of a conical frustal surface engaging in a corresp. recess in the end of the shaft, and by the ball (7) supported by a helical spring (6) in a central cavity (10). The screw passes with clearance through the centres of the ball and spring.