Document 6504405

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HOW TO USE
THE No. 4020
JIG SAW..
.
Reprinted Through the Courtesy of M E C H A N I X I L L U S T R A T E D
Too offen though* of us a mere foy, the jigsaw in
remllfy i s o m of the more versatile power foofs.
IT'S
no task at all to whip up an airtight case before any craftsman's jury
for the jigsaw (sometimes caIIed the scroll
saw) as a favorite power tool.
While it was not intended to do the work
of a circular saw or bandsaw, i t ran sub for
either in many operations. But the number one feature of this power tool is its
ability to cut fine decorative curves, especially '*inside" curves which are started by
first drilling a hole in the stock, inserting
the removable blade and then cutting in the
regular manner. Metal, plastics, fiber, etc.,
can be also cut when special blades are
used. In addition, fdes and sanding sticks
can be quickly chucked to convert your
jigsaw inta a filing machine or fine sander.
Anyone can learn to operate the jigsaw
with a minimum of practice. It i s safer to
use than most other power tools. Provided
the most elementary precautions are taken,
the average 12-year-old can be allowed to
handle it. Thus it is the ideal tool for
teaching youngsters the r u d i m e n t s of
craftsmanship.
These are just a few of the considerations which suggest that the jigsaw i s an
all-around machine, a small workshop in
By Joba P. Arnold
itself, and one of the first power tools the
budding craftsman should buy.
Ideally, you should obtain a,heaily-duty
jigsaw powered by a % to %-hp. con
denser or repulsion motor. By using mul-,
tipIe pulleys, it'll be capable of speed
variations from 570 to 1,660 r.p.m. This is
necessary in order to work various materials. Such a saw is of the reciprocatingplunger type, i s splash lubricated, has a
24-in. clearance from saw blade ta back,
and can take materia1 up to 2V4 in. thick.
It is a simple procedure to set up the
machine. The various controls are shown
in the accompanying illustrations. The
drive belt is pIaced on the pulley step that
will give the correct sawing speed for the
material you're working. In general, work
soft materials at high speeds and hard materials at slower speeds. The correct blade
is selected for the type of work and inserted
vertically in the flat jaws of the Jower
chuck. The squared end of a scrap of wood
will aid in setting the blade at right angles
to the table. The plunger is then raised to
its highest point (by turning the pulley by
hand) and the free end of the blade is
clamped in the jaws of the upper chuck.
Tension is adjusted by pulling up on the
spring housing and securing it with the
knurled knob at the right side of the overarm.
The purpose of the hold-dawn is to prevent the work from being raised from the
table during the upward stroke of the saw
blade. Blade guides and a blower to clear
wdust away from the line of cut are care d on the upper shaft. T h e roIIer guide
should be adjusted to bear lightly against
the back of the blade and the slotted guide
should be taken uw to arevent side-twist.
Both guides m~?st
-be aajusted so the sIot
does not project beyond the gullets of the
saw teeth-this would quickly ruin the
WOW,,,
. ~ . . c e clamped to the saw table is often
ureful when ripping pleces of lumber ta u width.
A
blade.
Saber blades are mounted somewhat differently,being held only in the lower chuck.
This saves considerable time when making
inside cuts as it is unnecessa1.y to release
the blade from the upper chuck to insert
the stock.
Files and small sanding drums having
$-in. shanks can be held in the V-jaws of
the lower chuck, converting the jigsaw
into an efficient tool for Wshing the edges
of wood or metal after they have been
sawn roughly to [Continued on page 111
CAP2----SHAFT
ARM- REMOVAL BOLT
HOLD-DOWN
ROD
HEAVY CAST WERA
C+ 74CITOR
MOTOR
Cutting raised letters lor signs out of wood or
metal
a typical job for which j i g a m Is used.
,
-
-
-- -
---LOCK KNOB
-JAM
BUSHING
,SHAFT WSHING
SEAL UNIT
UPPER SHAFT
UPPER CHUCK
ROLLER BRACKET
SLOTTED GUlDE
PULLE Y GUARO
MOTOR PULLEY
GUARD KNOB
**TILT
TRUNNIONS
LOWER SHAFT
DEGREE POINTER
LOCK-BAR N U T
SW[VEL SEGMENT
UPPER B€ARINC, SEALS
SWIVEL
LOCK PLATE
GUIDE PLATES
SET SCREWS
._--,OIL
ORAlN
_.--HEAVY
..
CAST BASE
LOWER BEARING
PWUING UP M*l
S H A F T ASSEMBLY
APPLIES GREATER
SPRING -RETURN
W A D 70 BLADE
,
I
,
MOUNTING A FILE
OR WBER BLADE
IN THE V-JAWS
(UP T O W" SHANK
CAN BE USED)
THUMB SCREW
LOCKS 'HOLD
DOWN'
.-
KNURLED
BCILTS ADJUST
ROLLER POSITION
AND 'PRESSURE
SET SCREW
CLOSES JAWS
ON BLAOE
END (CHUCK
ALSO ROTATES 903
.
ALLEN WREMW
d
INSERT
%
BLAOE-WPWRT
ROLLER BACK5
SCREW
FORK KEEPS
U)WER CMUCK TAKES SUSPENSION BLADES,
SABER BLAOES, FILES, AND ABRASIVE STICKS
WORK FLAT
ATANY ANGLE
UPPER AND LOWER
CHUCKS ALSO
ROTATE 90'
HOLD-DOWN SHAFT
IS SWITCHED TO
R , H, SlDE O F HEAD
TABLE ROTATES 90" TO PERMIT CUTTING
LONG STOCK WEN w n u T~LTEDM an
SABER SAW
LOCK
LARGE PANELS ARE CUT WITH SHORT
SABER SAWS BY REMOVING OVERARM
SCREW
TABLE TILTS 45' TO THE RIGHT
AND 15' TO THE E F T
-PENCIL LINE
-----SAW LINE
SEVERAL M€THOW
OF PRODUCING
SMRP WRNERS
shape. The work table can be tilted 45" to the
right and 15" to the left for bevel-sawing Furthermore, the table, the hold-down, and both
chucks can be rotated 90". This allows ripping long boards and makes it possible to saw
down the center of a 4-ft. width of wallboard
~ithoutremoving the overarm. And, to give
"the tool unlimited capacity, the overarm can
be removed.
There i s a certain knack in operating a jigsaw to produce the best results. The pattern
is usually marked on the stock with a pencil
and the work is guided freehand to follow the
lines. The work must not be forced into the
saw blade or twisted violently. The best
method is to feed slowly with one hand while
the other rests on the table to serve as a guide.
A wood rip fence can be clamped to the table
when ripping a number of pieces to a set
width. Fine jeweler's blades will turn abrupt
corners,but wider, thicker blades require different techniques. Either saw out into waste
material or bore holes in the angles, as shown.
Although a light jigsaw doesn't have the
capacity for cutting heavy stock,a heavy-duty
job using a coarse blade will bite through
2x4's or similar stock with ease. All in all,
this is a useful tool for any craftsman---a too1
that will eventually pay for itself in time saved
and completed projects.
To r a w saroreI dupIicaf.m ham cardboard or
cloth, ~ a a d d c hlayarm beta
I.
Whma using a aabsr bludm, Ih.uppmr chuck and
holddown arm raimod madroly out 01 the may.
Reprinted from MECHANIX ILLUSTRATED
Small sanding drums can be uned to smooth the
edges of woodwork prior to pdniing the piece.
Four different saw apeeds are oblalned merely
by shifting drive belt on the step pulleys.
W h e t bardwarm. such m drawat.pul1 mscutch~onm
and kmy plaimr, 1. amlly cut on tha vmrsalilo sow.
For prac1aIon BUnq
of dellcat. hotwork In metal.
ume a 510 clamped In the V-laws ol the lowor chuck.
JIG SAW ACCESSORIES
SABER BLADE
SUPPORT
m
!e
No. 41 2 5 SABER
BLADE SUPPORT
for Atlas 24" Jig
Saws. Column fits
ready drilled hole
in trunnion base,
set screw locks it in
position. Bracket
slides in and out to
accommodate various blade widths. 6
OZ.
No. 9014 STAND, for Atlas 24" Jig
Saws. Heavy gauge steel - provides a
rigid support for accurate work. T o p
ready drilled for bolting jig saw in place.
Assembly bolts furnished. 8" x 36" x 32"
high. 36 lb.
JIG SAW L A M P
No.4121 JIGSAW
LAMP. T h r o w s
plenty of light on
work. Ball joint in
head-positions any
angle. Has 25" flexibEe
ft' rubber cord' push-thmugh
switch. Mounting bracket and bolts furn-
BELT GUARD
No. 41 2 0 BELT GUARD for Atlas 24"
Jig Saws. Aluminum, covers belt and pulleys as required by industrial and vocational safety codes. Mounting bracket,
bolts and lock knob furnished. Bolts to
motor mounting base. 5 lb.
ished. 3 Ib.
--
6" JIG SAW BLADES
Width
Teelh
Pet
Inch
Width
Teeth
Per
Inch
-187
10
Thick-
Mm
ATLAS JIG SAW
BLADES
Use
near
For wood, plastics,
hard rubber, ivory
metal
celluloid.
For bone, pearl,
leather, mica, shells,
metals.
Forall
Over%"thick
Ferrous
Over :IS2"thick
and Non- Over $4" thick
ferrous
Over :Kimthick
Metals and Over :!ti+" thick
Woods
Over I/b" thick
Weight 2 oz. per dozen.
Not for
are special analysis
steel-hardened for
fast, clean cutting
and long blade life.
No. 4 100 SET OF
1 2 BLADES, i n -
cludes one each of
blades l i s t e d a t
right. 2 oz.
5'h" SABER BLADES
No.
Use
f
o
r
All saber sawing
Thickness
.028
.02X
.250
Weight 3 oz. per six.
ATLAS PRESS COMPANY
KALAMAZOO, MICHIGAN, 'U.S.A.
...*I
C.