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Dado Cutting – Dadoing is cutting a wide
groove into a workpiece or cutting a rabbet
along the edge of a workpiece. A dado insert,
shown in Figure 38, is necessary for this type of
operation.
A dado insert (stock # 708098) designed to fit
the JWTS-10 Table Saw can be ordered from
your dealer or WMH Tool Group.
Do not use the standard table
insert for dadoing operations.
Figure 38
The process of cutting 1/8" to 13/16" grooves in
workpieces is accomplished by the use of a
stacked dado blade set or an adjustable type
blade mounted on the saw arbor. By using
various combinations of the stacked dado
blades, or properly setting the dial on an
adjustable blade, an accurate width dado can be
made. This is very useful for shelving, making
joints, tenoning, etc. The guard, splitter, and
anti-kickback pawls supplied with the saw
should be used for all cutting operations where
they can be used. When performing operations
where the guard can not be used, as in some
dadoing operations, alternative safety
precautions should be taken. These include
push sticks, feather boards, filler pieces, fixtures,
jigs and any other appropriate device that can
be utilized to keep operator's hands away from
the blade. Upon completion of the operation
requiring removal of the guard, the entire guard
assembly must be placed back on the machine
in its proper working order.
Never use a dado head in a
tilted position. Never operate the saw without
the blade guard, splitter and anti-kickback
pawls for operations where they can be
used.
Safety Devices
Feather Board
The feather board (Figure 39) should be made
of straight grain hardwood approximately 1" thick
and 4" to 8" wide depending on the size of the
machine. The length is developed in accordance
with intended use. Feather boards can be
fastened to the table or rip fence by use of
C-clamps. Alternatively, drilled and tapped holes
in the table top allow the use of wing nuts and
washers as a method of clamping. If this method
of fastening is used, provide slots in the feather
board for adjustment. (The illustration shows a
method of attaching and use of the feather
board as a vertical comb. The horizontal
application is essentially the same except that
the attachment is to the table top.)
Figure 39