, . .. .-. < . . 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.