Anti-vibration slots: Slots
cut in the body of the blade, in a starburst pattern, to reduce vibration so
the blade runs more smoothly, producing a cleaner cut.
Arbor hole: The central hole
in the blade plate through which the saw arbor fits. This must be accurately
broached or cuts will waver.
ATB: Alternate Top Bevel. Tooth
grind where the bevel alternates from left to right, leaving knife-like edges
at each side, on alternating teeth. Useful for general and crosscut work. Angles
may range between 10 and 20 degrees.
Brazing: Molten brass-based method
of attaching tips to saw body. Extremely strong bond.
Expansion slots: Slots cut into
the blade body to control expansion, thus reducing distortion and sloppy cuts.
Flat Top Grind: Chisel like flat
grind at tips. No bevel angles. Used in rip blades.
Gullet: The area in front of
each tooth cut into the saw plate. The gullet allows, and controls, chip removal. Small
chips, as in crosscuts, work with smaller gullets, while rip cuts demand bigger
teeth and deeper gullets.
Hook angle: The angle made by
the face of the tooth with a line drawn up from the center of the saw. The angle
may be as much as 20 degrees, for a very aggressive feed, to as low as -5 degrees
to reduce any tendency of either the blade or the work to climb during feed.
Kerf: The width of the slot cut
by the blade.
Laser cut: saw plates are cut
by laser today for greatest accuracy; the slot cutting done on the blade is
done as the blade is cut, with the same set-up. Cuts for expansions and anti-vibration
slots are one example of laser cutting. Laser cutting does not stress the metal
as much as hydraulic stamping, the old method.
Plate: The saw body. Thicknesses
vary from 0.063" to 0.087". Thin kerf blades are useful for low powered
(1-1/2 HP and down) saws in rip cuts, and for larger blades in crosscuts.
Triple Chip Grind: One flat top
tooth is followed by one cut in a trapezoid shape that is a little higher. That
higher trapezoid (edges are cut away) tooth precuts material, which helps to
reduce chipping in laminates and melamine.