Use and Care Manual

16
Figure 14-3
Short swarf material such as brass, bronze,
aluminum and hard cast iron require smaller cutting
angles because the swarf becomes crushed
immediately and the rake angle has little effect
during the cutting stage.
The cold saws use discs with positive cutting
angles for cutting solid materials and with negative
cutting angles for cutting hollow profiles. This is
because, as a result of the high cutting speeds,
even with non-ferrous materials the tool ”strikes”
against the wall of the profile to be cut several
times, thus requiring a cutting edge with a larger
resistant section.
Figure 14-4
Circular saws can also be characterized by other
parameters such as the whine reduction feature,
which cuts down noise at high speeds, or
expansion, which compensates for the pushing of
chips inside the cutting edge, thus reducing the
thrust on the walls of the material to be cut.
Figure 14-5