Table of Contents
Advertisement
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 ).
Hide quick links:
Advertisement
Table of Contents
