Charnwood W619PSF Owner's Manual page 19

45 Degree Threaded Nut
Limiting Collar
Threaded Shaft
45 Degree Stop
Using a 4mm Allen Key, loosen the 45
degree limiting collar situated at the
opposite end of the threaded shaft.
Using a mitre square, adjust the blade
accurately to 45 degrees.
Hold the limiting collar firmly against the
Threaded Nut and retighten the grub screw.
Replace the blue covers and handwheel.