Bosch Power Tools 1894-6, 1873-8F, 1873-6, 1893-6 manual Grinding Operations, Sanding Operations

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Start the tool before applying to work and let the tool come to full speed before contacting the workpiece. Lift the tool from the work before releasing the switch. DO NOT turn the

switch “ON” and “OFF” while the tool is under load; this will greatly decrease the switch life.

MOTOR HOUSING RELEASE LEVER

(Model 1894-6 only)

Your tool is equipped with a motor housing release lever that will allow you to rotate the spindle in either direction 90˚. To use this feature, pull release lever in direction of arrow to release housing, and rotate housing until it clicks into place.

Grinding Operations

SELECTING GRINDING WHEELS

! WARNING Before using a grinding wheel, be certain that its maximum

safe operating speed is not exceeded by the nameplate speed of the grinder. Do not exceed the recommended wheel diameter.

DISC GRINDING WHEELS

Grinding wheels should be carefully selected in order to use the grinder most efficiently. Wheels vary in type of abrasive, bond, hardness, grit size and structure. The correct type of wheel to use is determined by the job. Use disc grinding wheels for fast grinding of structural steel, heavy weld beads, steel casting, stainless steel and other ferrous metals.

GRINDING TIPS

Efficient grinding is achieved by controlling the pressure and keeping the angle between wheel and workpiece at 10° to 15°. If the wheel is flat, the tool is difficult to control. If 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.

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 Operations

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.

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Contents Read Before Using Electrical safety General Safety RulesWork area safety Personal safetyService Angle Grinder Safety RulesPower tool use and care Power tools are dangerous in the hands of untrained usersGrinder, resulting in possible serious personal injury Kick-backSymbols Functional Description and Specifications Angle GrindersGrinder Assembly Small Flange SET Part no 607 000 Flange with Shoulder Mounting Type 28 or Type Grinding WheelsDo not use the flange set TypeSander Assembly Operating InstructionsGrinding Operations Sanding OperationsSanding Wood Wire Brush OperationsSanding Tips Sanding MetalAccessories MaintenanceCleaning Sécurité électrique Consignes générales de sécuritéSécurité du lieu de travail Sécurité personnelleUtilisation et entretien des outils Électroportatifs Consignes de sécurité de la rectifieuse dangleEntretien Le plomb provenant des peintures à base de plomb Symboles Prises D’AIR Contrôle DES Vibrations Bride DE Arbre Description fonctionnelle et spécificationsRectifieuses d’angles Montage Protecteur Levier DEAssemblage de la rectifieuse Bride OU CONTRE-ÉCROU Broche BrocheType Assemblage de la ponceuse Consignes de fonctionnementTravaux de meulage Travaux de ponçagePonçage DES Métaux Travaux à la brosse métalliquePonçage DU Bois Les brosses métalliquesEntretien AccessoiresNettoyage Seguridad eléctrica Normas generales de seguridadSeguridad del área de trabajo Seguridad personalMecánicas Normas de seguridad para amoladoras angularesServicio de ajustes y reparaciones BM 1609929H54 08-06 8/3/06 1144 AM Con aislamiento doble SímbolosDe Ni-Cd Descripción funcional y especificaciones Amoladoras angularesEnsamblaje de la amoladora Montaje DE Ruedas DE Amolar DE Tipo 28 O DE Tipo Pestaña CON ResaltoEnsamblaje de la lijadora Instrucciones de funcionamientoOperación de amolado Operaciones de lijadoLijado DE Madera Operaciones con escobillas de alambreConsejos Para Lijar Lijado DE MetalServicio MantenimientoAccesorios LimpiezaRemarques Notas Limited Warranty of Bosch Portable and Benchtop Power Tools