Sears 113.2945 - Manual (Page 15)

USE OF THE DADO HEAD
The dado saw (or head) is a special set of blades for cutting
grooves and dados. The Craftsman 8-inch Kromedge Dado
Set may be purchased at any Sears Retail Store or Catalog
Order House. The complete head consists of two outside
blades 1/8-inch thick, six chipper blades 1/8-inch thick
and paper washers for 1/16-inch width adjustments. With
these blades, grooves may be made in widths of 1/8-inch,
1/4-inch, and additional widths in steps increased by
1/16-inch each, up to a maximum of 13/16-inch. Outside
blades may be used alone, but chippers cannot be used
alone. When the maximum 13/16-inch width of dado is
used on the motor shaft, the outside loose collar must not
be used. The width of the dado can be reduced while using
the loose collar and two or more passes may be made with
the work to obtain the desired width of cut. Whenever two
or more chippers are used, the cutting ends should be
staggered as evenly as possible around the circumference.
Fractional adjustments in thickness of the head can be
made by using paper washers between the outside blades
and chippers.
Dado head operations are essentially the same as those
operations using a standard saw blade — but the dado
head takes a bigger bite, therefore, the work-piece should
be held more firmly. When a groove wider than the dado
head is needed, make two or more passes, with cuts spaced
to overlap a trifle. Dado work is performed in the cross-cut
position. Ploughing is done in the ripping position. If the
rip or plough position is used, the saw guard and anti­
kickback pawl assembly should be adjusted as described
in the paragraph "RIPPING". Rabbeting is done with the
motor shaft in a vertical position. (See figure 35.) When
rabbeting, the motor is indexed 90° to the vertical position
so the blades are between the table top and motor, and
the yoke is indexed 90° clockwise and locked. The saw
is moved back on the radial arm and locked to the arm
when the amount of the blade extending forward of the
fence is equal to the depth of the rabbet desired. If the
depth of the rabbet is large, do not attempt to cut it in one
operation. Lower the radial arm until blades are in a
position to cut the desired width of rabbet in the edge of
the board. The discharge elbow should be directed to the
rear of the saw.
MOLDING OR SHAPING
This work is performed with Craftsman Molding Cutter
Heads, and a set of cutters depending on the type of mold­
ing cut desired. The saw is positioned in the same manner
as that described for rabbeting. (See figure 36.) Since the
position of the cutters can be adjusted with respect to the
fence and table top, any or all of the cutter shapes may
be used.
The Molding Cutter Guard should be used with Molding
Cutter Head.
REMOVAL AND INSTALLATION OF
MANUAL BRAKE ASSEMBLY
Prior to performing any operation that requires the use of
the motor shaft opposite the saw blade encl (routing, dove­
tailing, boring, sanding, etc.), it will be necessary to remove
the manual brake assembly to expose the end of the shaft.
This is accomplished as follows: (See figure 37.)
1. Remove the guard assembly, saw blade and both collars.
2. Remove two 1 /4-20 x 7/16-inch, hex-head screws to free
the brake housing from the motor.
3. Pull the brake housing off end of motor housing, leaving
the brake shoe and spring in the brake housing.
4. Hold the motor shaft (at saw end) with the shaft wrench
and remove the brake drum from motor shaft with the
arbor wrench. (This end of motor shaft has right-hand
threads.)
5. Install a chuck or other accessory as required, on end
of motor shaft and tighten it firmly on the threads. The
motor shaft should be held with the shaft wrench at saw
end of shaft while tightening the chuck or other accessory.
6. When finished with the particular operation being per­
formed, install the manual brake assembly by reversing
the preceding removal procedure. (See figure 37.)
7. Install saw blade and guard assembly.
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