worm-drive (view B). Circular saws can use many
different types of cutting blades, some of which are
shown in figure 3-16.
COMBINATION CROSSCUT AND RIP
BLADES. Combination blades are all-purpose
blades for cutting thick and thin hardwoods and
softwoods, both with or across the grain. They can
also be used to cut plywood and hardboard.
CROSSCUT BLADES. Crosscut blades have
fine teeth that cut smoothly across the grain of both
hardwood and softwood. These blades can be used
for plywood, veneers, and hardboard.
RIP BLADES. Rip blades have bigger teeth
than combination blades, and should be used only to
cut with the grain. A rip fence or guide will help you
make an accurate cut with this type of blade.
HOLLOW-GROUND BLADES. Hollow-
ground blades have no set. They make the smoothest
cuts on thick or thin stock. Wood cut with these
blades requires little or no sanding.
ABRASIVE BLADES. Abrasive blades are
used for cutting metal, masonry, and plastics. These
blades are particularly useful for scoring bricks so
they can be easily split.
Figure 3-17 shows how versatile the circular saw
can be. To make an accurate ripping cut (view A), the
Figure 3-16.-Circular saw blades.
Figure 3-17.-Different ways to use a circular saw.