Loading ...
Loading ...
Loading ...
CROSSCUTTING -- Continued
covers table in front of blade_ th_ ;_'';
gage should be reversed.
crosscutting is done with the miter
gage set at "90" (at a right angle
to the slide and groove). The
splitter need not be removed, but
is not needed for this operation.
Start the cut slowly and hold work
firmly to table to prevent kick-
back or chatter. (Loosely held
workpieces will sometimes vibrate
against table when crosscutting.
This tends to bind blade and dull
teeth.) An auxiliary wooden ex-
tension bolted to miter gage
greatly improves the gage _s a
support. If fitted with pin points
(phonograph needles are excel-
lent) or sandpaper, the extension
will help prevent side creep of
the work. If workpiece overhangs
table enough to sag at each end,
provide supports the same as in
ripping operations. The stop rod
on the miter gage, or a stop block
fastened to the extension, is used
to fix position of left-hand edge
of work for measuring length of
piece to be cut off.
BEVEL AND MITER CUTS
Bevels from 1° to 45 ° are cut by tilting the saw blade.
Operations are the same as for ripping or crosscutting--
but work should be extra well supported to prevent creep.
bikers ate crosscuts at an angle
to the edge of the workpiece. The _-_,'1
miter gage is set at the required' "'_ _;angle to make the cut. Here also, __
precautions must be taken to pre-
vent creep.
USE OF THE DADO HEAD
The dado saw or head, as it is.
called, is a special set of blades
for cutting grooves and dados on
the circular saw. Dado heads can
he purchased at any Sears Retail
Store or Mail Order House. The.
head consists of two solid, stiff
outside blades, and a number of
inside chipper blades. Tile outside
blades are 1/8-inch thick; there is
one 1/4-inch, two 1/8-ioch, and
one 1/16-ioch chipper blades.
With these blades, grooves of 1/8
inch, I/4 inch, and additional
widths increased in steps of 1/16
inch up to a maximum of 13/16-
__OUtSIDt _,_w , I 64 ¸'
% _. €Niece R
O41ppt ps AmA_'GED
Source Form 9763
inch wide can be cut. Outside blades can be used alone,
chippers cannot.
When using a full set of dado blades, it is permissible
to eliminate the loose collar (Key No. 9, fig. I) if the
operator so desires. Or the width of the dado can be
reduced while using the loose collar and two or more
passes can be made with the work to obtain the desir-
ed width of cut.
A dado insert (Key No. 100, fig. 1) must be used to re-
place the standard table insert. When using a full 13/16
mch dado set the arbor cannot be tilted to 45 ° without
touching the insert. Do not operate in this position.
Whenever two or more chippers are used, stagger the
swaged ends as evenly as possible around the circumfer-
ence. Fractional adjustments in thickness of the head
can be made b)' using paper washers between the out-
side blades and chippers.
Dado head operations are much
the same as those with a standard
blade--but the dado head takes
a bigger bite, so that workpiece
should be held more firmly. It is
good practice to use a hold-down
jig like the one illustrated.
When a groove wider than the1
dado head is needed, make two
or more passes. Best method is
to use a notched stop block to po-
sition each successive cut. Block
is fastened to edge of table where
it can be used to position work
before starting the cut; but in such a position that it will
not contact work during the cutting operation. Space
cuts so that they overlap a trifle.
When cutting a gain--a groove that is closed at one
end-- use a stop block to fix the end of the cut. To lo-
cate the stop, place work alongside dado head in position
in which it will be when cut is finished, then rig the stop
at the end of the work. When
cutting a stopped groove--which
is closed at both ends--also use
a starting block, as shown in the
illustration. This is located in
same manner as the stop block.
SANDING
A sanding wheel can also be
mounted on the saw arbor --
and the tilting arbor of the saw
gives much versatility for fine
sanding operations.
STABILIZING WASHERS
FOR THIN BLADES
Stabilizing washer should only be used with thin blades.
When using these washers, the maximum depth of cut
cannot be obtained and the washers must be kept below
the bottom surface of the table insert (Key No. 109,
fig. l ).