SAW BLADE DRIVE SYSTEM

摘要

A saw blade (10) and a drive spline (11) having a drive configuration therebetween. The drive configuration comprises inner driven surfaces (22) on the saw blade (10) which are driven by the drive spline (11) which has outer drive recesses (23) complementary to the inner driven surfaces (22) of the saw blade (10). First and second radials (r1, r2) extend outwardly from the axis of rotation (21) of the drive spline (11) and saw blade (10). They extend so as to contact the ends of a respective recess or drive surface most closely located to the axis of rotation. Third and fourth radials (r3, r4) extend to contact the ends of the most remotely located recess or drive surface. The angular distance between the first and second radials is greater than the angular distance between the third and fourth radials.