Bosch Power Tools 1657 manual Causes and Operator Prevention Kickback

Page 4

BM 2610909797 6/00 7/14/00 8:39 AM Page 4

Lower guard should be retracted manually only for special cuts such as “Pocket Cuts” and “Compound Cuts”. Raise lower guard by Retracting Handle or Lower Guard Lift Lever. As soon as blade enters the material, lower guard must be released. For all other sawing, the lower guard should operate automatically.

Always observe that the lower guard is covering the blade before placing saw down on bench or floor. An unprotected, coasting blade will cause the saw to walk backwards, cutting whatever is in its path. Be aware of the time it takes for the blade to stop after switch is released.

NEVER hold piece being cut in your hands or across your leg. It is important to support the work properly to minimize body exposure, blade binding, or loss of control.

Hold tool by the insulated gripping surfaces when performing an operation where the cutting tool may contact hidden wiring or it own cord. Contact with a "live" wire will also make exposed metal parts of the tool “live” and shock the operator.

When ripping always use a rip fence or straight edge guide. This improves accuracy of cut and reduces the chance for blade binding.

Always use blades with correct size and shape (diamond vs. round) arbor holes. Blades that do not match the mounting hardware of the saw will run eccentrically, causing loss of control and will not allow proper vari-torque engagement.

Never use damaged or incorrect blade washers or bolts. The blade washers and bolt were specially designed for your saw, for optimum performance and safety of operation. The blade washers and the bolt on your saw have been designed to work as a “VARI- TORQUE CLUTCH”. Understand the operation and settings of the VARI-TORQUE CLUTCH, because the proper setting of the CLUTCH, combined with firm handling of the saw will allow you to control KICKBACK.

Do not run the saw while carrying it at your side. Lower guard may be opened by a contact with your clothing. Accidental contact with the spinning saw blade could result in serious personal injury.

Depending upon use, the switch may not last the life of the saw. If the switch should

fail in the “OFF” position, the saw may not start. If it should fail while the saw is running, the saw may not shut off. If either occurs, unplug the saw immediately and do not use until repaired.

This circular saw should not be mounted to a table and converted to a table saw. Circular saws are not designed or intended to be used as table saws.

CAUSES AND OPERATOR PREVENTION OF

KICKBACK:

Kickback is a sudden reaction to a pinched, bound or misaligned saw blade, causing an uncontrolled saw to lift up and out of the workpiece toward the operator.

VARI-TORQUE

CLUTCH

When the blade is pinched or bound tightly by the kerf closing down, the blade stalls and the motor reaction drives the unit rapidly back toward the operator.

If the blade becomes twisted or misaligned in the cut, the teeth at the back edge of the blade can dig into the top surface of the wood causing the blade to climb out of the kerf and jump back toward the operator.

Kickback is the result of tool misuse and/or incorrect operating procedures or conditions and can be avoided by taking proper precautions as given below:

Maintain a firm grip with both hands on the saw and position your body and arm to allow you to resist KICKBACK forces. KICKBACK forces can be controlled by the operator, if proper precautions are taken.

When blade is binding, or when interrupting a cut for any reason, release the trigger and hold the saw motionless in the material until the blade comes to a complete stop. Never

-4-

Image 4
Contents 2610909797 Power Tool Safety Rules Work AreaSafety Rules for Circular Saws ServiceCauses and Operator Prevention Kickback BM 2610909797 6/00 7/14/00 839 AM Symbols Functional Description and Specifications Circular SawAttaching the Blade AssemblyVARI-TORQUE Clutch Depth Adjustment Bevel AdjustmentOperating Instructions Cutting Angle CheckSwitch General CutsCutting MASONRY/METAL Pocket CutsRIP Cuts Cutting Large SheetsRIP Board Guide Electric Brake with interrupters Maintenance AccessoriesBlessures graves Règles de Sécurité GénéralesConservez CES Instructions Consignes de sécurité pour scies circulaires RéparationCauses ET PRÉVENTION, PAR Lopérateur DU Rebond Le plomb provenant des peintures à base de plomb Symboles Scie circulaire Description fonctionnelle et spécificationsCapacités maximales Assemblage Embrayage « VARI-TORQUE »Consignes de fonctionnement Réglage DE LA Profondeur DE CoupeRéglage DE LA Coupe EN Biseau Guide D’ALIGNEMENTInterrupteur La mise en marche, tenezCoupes Régulierès Mouvement de la garde inférieureCoupes DE Refente Coupe DE Grandes FeuillesUtilisation D’UNE Planche Comme Guide DE Refente Frein électrique avec interrupteurs Maintenance AccessoiresNormas de seguridad para herramientas mecánicas Conserve Estas InstruccionesArea de trabajo Seguridad eléctricaNormas de seguridad para sierras circulares Utilización y cuidado de las herramientasCausas DEL Retroceso Y SU Prevencion POR EL Operador Embrague DE PAR Motor VariableBM 2610909797 6/00 7/14/00 840 AM Con aislamiento doble SímbolosDe Ni-Cd Descripción funcional y especificaciones Sierra circularRiesgo de arrancar la herramienta accidentalmente Número modelo 1655 Hoja 184 mmEnsamblaje Embrague DE PAR Motor VariableAjuste DE Inclinación Instrucciones de funcionamientoGuía DE Línea Guía DE Interruptor Cortes GeneralesMovimiento libre del protector inferior Corte DE Mamposteria Y MetalMaterial y se producirá Retroceso Corte DE Planchas GrandesCortes AL Hilo TABLERO-GUIA Para Cortar AL HiloFreno eléctrico con interruptores Realice servicio de ajustes y reparaciones inmediatamenteMantenimiento AccesoriosBM 2610909797 6/00 7/14/00 841 AM BM 2610909797 6/00 7/14/00 841 AM Limited Warranty of Bosch Portable and Benchtop Power Tools