Assessments - 3, GPA: 4 ( )

Fabricante : Bosch Arquivo Tamanho: 1.09 mb Arquivo Nome : Língua de Ensino:

TO UNLOCK SWITCH AND TURN TOOL "ON": Push "Lock-OFF" switch release lever backward to unlock paddle switch, then squeeze paddle switch. TO SWITCH TOOL "OFF": Release pressure on paddle lever. The switch is spring loaded and will return to "OFF" position automatically. PADDLE SWITCH WITH "LOCK-OFF" ANH "LOCK-ON" FEATURI (Models 1710 & 1711 only The Paddle switch enables the operator to control the switch functions of "Lock-OFF", "ON/OFF" and "Lock-ON". TO UNLOCK SWITCH AND TURN TOOL "ON": Push switch release lever backward to unlock ON/OFF switch, then squeeze paddle switch. TO SWITCH TOOL "OFF": Release pressure on paddle lever. The switch is spring loaded and will return to "OFF" position automatically. "LOCK-ON" BUTTON (Models 1710 & 1711 only The "Lock-ON" feature, incorporated into the paddle switch, is a convenience for long operations. TO LOCK SWITCH "ON": After paddle switch has been activated push "Lock-ON" button at rear of tool completely in and release paddle switch. TO SWITCH TOOL "OFF": Squeeze and release paddle switch. PADDLE SWITCH "LOCK-OFF" SWITCH RELEASE LEVER "LOCK-ON" BUTTON (Models 1710 & 1711 only) Grinding Operations SELECTING GRINDING WHEELS hardness, grit size and structure. The correct Before using a grinding type of wheel to use is determined by the wheel, be certain that its job. Use disc grinding wheels for fast maximum safe operating speed is not grinding of structural steel, heavy weld exceeded by the nameplate speed of the beads, steel casting, stainless steel and grinder. Do not exceed the recommended other ferrous metals. wheel diameter. !WARNING GRINDING TIPS DISC GRINDING WHEELS Efficient grinding is achieved by controlling Grinding wheels should be carefully selected the pressure and keeping the angle between in order to use the grinder most efficiently. wheel and workpiece at 10° to 15°. If the Wheels vary in type of abrasive, bond, wheel is flat, the tool is difficult to control. If -9 BM 1609929F52 10/03 10/28/03 3:34 PM the angle is too steep, the pressure is concentrated on a small area causing burning to the work surface. !WARNING Excessive or sudden pres sure on the wheel will slow grinding action and put dangerous stresses on the wheel. Page 10 When grinding with a new wheel be certain to grind while pulling tool backwards until wheel becomes rounded on its edge. New wheels have sharp corners which tend to “bite” or cut into workpiece when pushing forward. Sanding Operationw SELECTING SANDING DISC Sanding discs are made of extremely hard and sharp aluminum oxide grits, phenol- resin bonded to a sturdy fiber backing for fast heavy-duty service and long life. The discs vary as to size and spacing of the abrasive grits. OPEN COAT (type H) — used for soft materials and on paint or varnish. CLOSED COAT (type K) —used for metal, hardwood, stone, marble and other materials. Sanding discs range in grit from 16 (very coarse) to 180 (very fine). To obtain best results, select sanding discs carefully. Many jobs require the use of several grit sizes and at times both “open coat and closed coat” discs are required to get the job done faster. See chart for application examples. Operation: Refinishing painted wood or metal surfaces. REMARKS GRIT To remove paint and to smooth surface irregularities. Coarse 16-24-30 To smooth the rough sanding. Medium 36-50-80 To remove scratches left by previous discs. Fine 100-120 To smooth surfaces for painting, polishing or waxing. Very Fine 150-180 SANDING TIPS For best results, tilt the Disc Sander at a 10° to 15° angle while sanding so that only about 1" of the surface around the edge of the disc contacts the work. !WARNING If the disc (accessory) is held flat or the back edge of the disc comes in contact with the work, a violent thrust to the side may result. If sander is tilted too much, sanding action will be too great and a rough cut surface or gouging and snagging will result. Guide the Disc Sander with crosswise strokes. Be careful not to hold the sander in one spot too long. Do not use a circular motion, as this makes swirl marks. Test before use on scrap stock. Do not force or apply pressure when sanding. Use only the weight of the tool for pressure. Excess pressure actually slows the tool down. If faster stock removal is desired, change to a coarser grit disc. Remove gummy paint from metal with an “open coat” disc. Sand until sparks start to appear, then stop and change to a “closed coat” disc to remove any remaining paint. SANDING WOOD When sanding wood the direction of the disc motion at the contact point should parallel the grain as much as possible. The rapid cut of discs and the swirl type scratch pattern they occasionally create generally prohibit their use for producing the final finish. Scratches and circular marks are usually the result of using too coarse a grit. When changing to a finer grit, move across the sanding lines that were made by a previous coarser disc. SANDING METAL When sanding automobiles or appliances, w...

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