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Saw Blades
Saw blades are made of two general types of metal: Tool steel or carbide.
Carbide is harder and  holds a sharp edge much longer than tool steel, but is
typically more expensive.
Plytooth
A Circular saw blade like the DeWalt
pair shown at the left with many small teeth designed for cutting plywood with
minimal splintering.
Dado blade
A special type of circular saw blade used for making wide grooved cuts in wood
so the edge of another piece of wood will fit into the groove to make a joint.
Dado blades can make different width grooves by addition or removal of chipper
blades of various widths between the outer dado blades. This first type is
called a stacked dado blade. There is another type of dado blade capable of
cutting variable width grooves. An adjustable dado utilizes a moveable locking
cam mechanism which causes the blade to wobble sideways more or less. This
allows continuously variable groove width from the lower to upper design limits
of the dado.
Materials
used for saws
There are several materials used in saws, with each of its own
specifications.
Brass
Mostly used in back saws because of its low price, its flow characteristics
that make the material relatively easy to cast, and unlike other types of saw,
the opposing force that takes place in back saws are relatively low because of
the pulling motion used.
Steel
Used in almost every existing kind of saw. Because steel is cheap, easy to
shape, and very strong, it has the right properties for most kind of saws.
Diamond
Used only in saws for the really heavy cutting. It is very expensive and comes
in two shapes: ropes and circular saws. Mostly used for cutting concrete and
other materials with rock-like structures or in softer materials, such as wood,
where the precision and high volume of work justifies the expense of
diamond-edged Cutting Tools. Diamond saws are made by combining powder metal
with diamond crystals, which are then heated and pressed into a molding to form
the diamond segments.
If you’re interested in looking at the many different types of saws we've looked at here, visit the excellent selection at ToolKing.com
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