Bosch 1278VSK User Manual

Operating/Safety Instructions

Consignes de fonctionnement/sécurité Instrucciones de funcionamiento

y seguridad

IMPORTANT: IMPORTANT : IMPORTANTE:

Read Before Using Lire avant usage Leer antes de usar

For English Parlez-vous français? ¿Habla español? See page 2 Voir page 10 Ver página 18

Consumer Information

Renseignement des consommateurs

Información para el consumidor

Toll Free Number: Appel gratuit : Número de teléfono gratuito:

1-877-BOSCH99 (1-877-267-2499) http://www.boschtools.com.

1278VSK

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Read and understand all instructions. Failure to follow all instructions

listed below, may result in electric shock, fire and/or serious personal injury.

SAVE THESE INSTRUCTIONS

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Work Area

Keep your work area clean and well lit.

Cluttered benches and dark areas invite accidents.

Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust. Power

tools create sparks which may ignite the dust or fumes.

Keep by-standers, children, and visitors away while operating a power tool.

Distractions can cause you to lose control.

Electrical Safety

Double Insulated tools are equipped with a polarized plug (one blade is wider than the other.) This plug will fit in a polarized outlet only one way. If the plug does not fit fully in the outlet, reverse the plug. If it still does not fit, contact a qualified electrician to install a polarized outlet. Do not change the plug in any way. Double Insulation

eliminates the need for the three wire grounded power cord and grounded power supply system. Before plugging in the tool, be

certain the outlet voltage supplied is within the voltage marked on the nameplate. Do not use “AC only” rated tools with a DC power supply.

Avoid body contact with grounded surfaces such as pipes, radiators, ranges and refrigerators. There is an increased risk of

electric shock if your body is grounded. If operating the power tool in damp locations is unavoidable, a Ground Fault Circuit Interrupter must be used to supply the power to your tool. Electrician’s rubber gloves and footwear will further enhance your personal safety.

Don't expose power tools to rain or wet conditions. Water entering a power tool will

increase the risk of electric shock.

Do not abuse the cord. Never use the cord to carry the tools or pull the plug from an outlet. Keep cord away from heat, oil, sharp edges or moving parts. Replace damaged cords immediately. Damaged cords increase

the risk of electric shock.

When operating a power tool outside, use an outdoor extension cord marked "W-A"

or "W." These cords are rated for outdoor use

and reduce the risk of electric shock. Refer to “Recommended sizes of Extension Cords” in the Accessory section of this manual.

Personal Safety

Stay alert, watch what you are doing and use common sense when operating a power tool. Do not use tool while tired or under the influence of drugs, alcohol, or medication. A moment of inattention while

operating power tools may result in serious personal injury.

Dress properly. Do not wear loose clothing or jewelry. Contain long hair. Keep your hair, clothing, and gloves away from moving parts. Loose clothes, jewelry, or long

hair can be caught in moving parts. Keep handles dry, clean and free from oil and grease.

Avoid accidental starting. Be sure switch is “OFF” before plugging in. Carrying tools

with your finger on the switch or plugging in tools that have the switch “ON” invites accidents.

Remove adjusting keys or wrenches before turning the tool “ON”. A wrench or a key

that is left attached to a rotating part of the tool may result in personal injury.

Do not overreach. Keep proper footing and balance at all times. Proper footing and

balance enables better control of the tool in unexpected situations.

Use safety equipment. Always wear eye protection. Dust mask, non-skid safety

shoes, hard hat, or hearing protection must be used for appropriate conditions.

Tool Use and Care

Use clamps or other practical way to secure and support the workpiece to a stable platform. Holding the work by hand or

against your body is unstable and may lead to loss of control.

Do not force tool. Use the correct tool for your application. The correct tool will do the

job better and safer at the rate for which it is designed.

WARNING

Power Tool Safety Rules

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Belt Sander Safety Rules

Do not use tool if switch does not turn it “ON” or “OFF”. Any tool that cannot be

controlled with the switch is dangerous and must be repaired.

Disconnect the plug from the power source before making any adjustments, changing accessories, or storing the tool. Such

preventive safety measures reduce the risk of starting the tool accidentally.

Store idle tools out of reach of children and other untrained persons. Tools are

dangerous in the hands of untrained users.

Maintain tools with care. Keep cutting tools sharp and clean. Properly maintained tools,

with sharp cutting edges are less likely to bind and are easier to control. Any alteration or modification is a misuse and may result in a dangerous condition.

Check for misalignment or binding of moving parts, breakage of parts, and any other condition that may affect the tools operation. If damaged, have the tool serviced before using. Many accidents are

caused by poorly maintained tools. Develop a periodic maintenance schedule for your tool.

Use only accessories that are recommended by the manufacturer for your model. Accessories that may be suitable

for one tool, may become hazardous when used on another tool.

Service

Tool service must be performed only by qualified repair personnel. Service or

maintenance performed by unqualified personnel could result in a risk of injury. For example: internal wires may be misplaced or pinched, safety guard return springs may be improperly mounted.

When servicing a tool, use only identical replacement parts. Follow instructions in the Maintenance section of this manual.

Use of unauthorized parts or failure to follow Maintenance Instructions may create a risk of electric shock or injury. Certain cleaning agents such as gasoline, carbon tetrachloride, ammonia, etc. may damage plastic parts.

Hold tool by insulated gripping surfaces when performing a operation where the cutting tool may contact hidden wiring or its own cord. Contact with a "live" wire will

make exposed metal parts of the tool "live" and shock the operator.

If your tool is equipped with a dust bag, empty it frequently and after completion of sanding. Be extremely careful of dust

disposal, materials in fine particle form may be explosive. Do not throw sanding dust on an open fire. Spontaneous combustion, may in time, result from mixture of oil or water with dust particles.

Always wear eye protection and a dust mask for dusty applications and when sanding overhead. Sanding particles can

be absorbed by your eyes and inhaled easily and may cause health complications.

Use special precautions when sanding chemically pressure treated lumber, paint that may be lead based, or any other materials that may contain carcinogens. A

suitable breathing respirator and protective clothing must be worn by all persons

entering the work area. Work area should be sealed by plastic sheeting and persons not protected should be kept out until work area is thoroughly cleaned.

Do not wet sand with this sander. Liquids entering the motor housing is an electrical shock hazard.

Never leave the trigger locked “ON”. Before plugging the tool in, check that the trigger lock is “OFF”. Accidental start-ups

could cause injury.

Unplug the sander before changing accessories. Accidental start-ups may

occur if sander is plugged in while changing an accessory.

Keep your fingers and clothing away from the belt. They could get cut or wedged

between the pulley, belt and motor housing.

Properly adjust tracking of belt to avoid it overhanging the housing. A running belt

overhanging its housing can cause severe lacerations.

Be aware of the location and setting of the Switch "Lock-ON" Button. If the switch

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is locked "ON", be ready for emergency situations to switch it "OFF", by first pulling the trigger then immediately releasing it without pressing the "Lock-ON" button.

Keep the cord to the side away from pulleys. The cord can be dragged into belt

housing and become entangled with the pulleys.

Clamp or secure workpiece when sanding. Clamping the workpiece prevents

it from being ejected from under the sander and leaves both hands to control the tool.

Clamp or secure sander if it is inverted and bench mounted for use as a table sander. Always use edge stop or guide when sanding short or small workpieces.

Fingers or clothing can be dragged into pulley and housing area.

Portable belt sanders are not intended to be permanently mounted as a bench or table sander. There are accessories available which can convert certain portable belt sanders for occasional stationary use. If such accessories are used always clamp or secure sander when inverted and bench mounted

for use as a table sander. Be aware of switch location and know how to shut off the tool in emergency situations. Always follow directions included with the accessory. Use sanding fence, stop or guide when sanding short or small workpieces.

Some dust created by

power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to cause cancer, birth defects or other reproductive harm. Some examples of these chemicals are:

• Lead from lead-based paints,

• Crystalline silica from bricks and cement

and other masonry products, and

• Arsenic and chromium from chemically-

treated lumber.

Your risk from these exposures varies, depending on how often you do this type of work. To reduce your exposure to these chemicals: work in a well ventilated area, and work with approved safety equipment, such as those dust masks that are specially designed to filter out microscopic particles.

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WARNING

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IMPORTANT: Some of the following symbols may be used on your tool. Please study them

and learn their meaning. Proper interpretation of these symbols will allow you to operate the tool better and safer.

Symbol Name Designation/Explanation

V Volts Voltage (potential)

A Amperes Current

Hz Hertz Frequency (cycles per second)

W Watt Power

kg Kilograms Weight

min Minutes Time

s Seconds Time

Diameter Size of drill bits, grinding wheels, etc.

No load speed Rotational speed, at no load

.../min Revolutions or reciprocation per minute Revolutions, strokes, surface speed,

orbits etc. per minute

0 Off position Zero speed, zero torque...

1, 2, 3, ... Selector settings Speed, torque or position settings.

I, II, III, Higher number means greater speed

Infinitely variable selector with off Speed is increasing from 0 setting

Arrow Action in the direction of arrow

Alternating current Type or a characteristic of current

Direct current Type or a characteristic of current

Alternating or direct current Type or a characteristic of current

Class II construction Designates Double Insulated

Construction tools.

Earthing terminal Grounding terminal

Warning symbol Alerts user to warning messages

Ni-Cad RBRC seal Designates Ni-Cad battery recycling

program

Symbols

This symbol designates that this tool is listed by Underwriters Laboratories.

This symbol designates that this tool is listed by the Canadian Standards Association.

This symbol designates that this tool is listed to Canadian Standards by Underwriters Laboratories.

This symbol

designates that this tool complies to NOM Mexican Standards.

This symbol designates that this tool is listed by Underwriters Laboratories, and listed to Canadian Standards by Underwriters Laboratories.

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Functional Description and Specifications

AUXILIARY

HANDLE

VENTILATION

OPENINGS

BELT TENSION

RELEASE LEVER

SANDING

BELT

SLIDE

ON/OFF

SWITCH

DUST PORT

VARIABLE

SPEED

DIAL

TRACKING

ADJUSTMENT KNOB

Disconnect the plug from the power source before making any assembly, adjustments or changing accessories. Such preventive safety

measures reduce the risk of starting the tool accidentally.

WARNING

SANDING

BELT

BACKING SURFACE

IDLER

ROLLER

TENSIONING

ROLLER

BELT TENSION

RELEASE LEVER

VENTILATION

OPENINGS

Compact Belt Sander

Model number 1278VSK No load speed n0 590-950/min Voltage rating 120 V 50 - 60Hz Belt size 1-1/2" x 12" Amperage rating 3.3 A

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SLIDE "ON/OFF" SWITCH

Your tool can be switched "ON" by the slide switch located on top of the motor housing.

TO TURN TOOL "ON" slide the switch forward.

TO TURN TOOL "OFF" slide the switch backward.

VARIABLE SPEED DIAL

This tool is equipped with a variable speed dial. The belt speed may be adjusted during sanding operation by presetting the dial on or between any one of the six numbers. However the optimum belt speed and grit of the sanding belt depends on the material and can be determined by a practical test. Note: the speeds listed below are only "approximate" or "suggested" settings.

Application Grit Speeds

Coarse Fine

Roughing paint 180 240 1-2 Removing paint, enamel 60 120 5-6 Softwood 60 240 5-6 Hardwood 60 180 5-6 Particle board 60 180 5-6 Rust removal 60 80 5-6 Non-ferrous metal 80 180 4-5 Plastic 80 240 2-3 Acrylic 80 240 1-2

DUST EXTRACTION

Your tool is equipped with a dust port for dust extraction. To use this feature, attach vacuum hose (optional accessory) to the dust port, and connect the opposite end of the hose to a shop vacuum cleaner.

AUXILIARY HANDLE

The auxiliary handle will provide additional control, support and guidance for the tool. To mount, thread handle into hole provided in housing.

TRACKING ADJUSTMENT

1. Plug tool into power source.

2. Hold the tool firmly in one hand, switch tool on and note the tracking of the sanding belt.

If the belt runs outward toward arrow 1, rotate the tracking adjustment knob counterclockwise

If the belt runs inward toward arrow 2, rotate the tracking adjustment knob clockwise.

Adjust the belt in this manner until the edge of the belt runs flush with the backing surface.

SANDING

For different materials, various sanding belts are available.

The removal rate and the quality of the surface are determined by the selection of the sanding belt (grit) as well as the belt speed setting (see Settings Table).

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Operating Instructions

To prevent personal injury,

always disconnect the plug from the power source before removing or installing the belt.

Before installing the new sanding belt, clean the backing surface, idler roller and tension roller.

1. Push down on the belt tension release lever to release tension on the rollers.

2. Install new sanding belt with the desired grit over backing surface and rollers.

3. Swing back the belt tension release lever to its original position to apply the proper tension to the sanding belt.

Sanding belts that are worn on one side can be turned by 180º. The special adhesive allows sanding in both directions.

WARNING

Assembly

BELT INSTALLATION

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Turn tool on and place the complete sanding surface on the workpiece to achieve uniform material removal. Work with moderate forward motion. Perform the sanding movements with parallel and overlapping passes. Sand in the direction of the grain; crossways sanding can result in uneven finishes.

As a result of the high removal rate, only light application pressure should be used while working to prevent damage to workpiece.

When sanding corner frames (e.g., interior corners), always move forward only so far that the sanding belt does not come in contact with the side that is vertical to the workpiece.

FLUSH SANDING

Your sander has been designed to allow convenient flush sanding on the right side of the sander, however your sander can be used on either surface by simply turning the tool upside down. This unique design allows flush sanding on the right and left sides of a workpiece.

ATTENTION: When the tool is being used upside down belt will rotate the opposite direction, and the dust collection system will not work.

Only flawless sanding belts produce good sanding results and protect the tool. Do not continue to use worn out, torn or heavily clogged sanding belts.

To increase belt life, apply uniform pressure. Increasing pressure does not improve sanding performance, but increases wear to the tool and the sanding belt.

Do not sand wood and metal with the same sanding belt.

Use only original Bosch sanding belts and accessories.

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Service

Preventive maintenance

performed by unauthorized personnel may result in misplacing of internal wires and components which could cause serious hazard. We

recommend that all tool service be performed by a Bosch Factory Service Center or Authorized Bosch Service Station.

TOOL LUBRICATION

Your Bosch tool has been properly lubricated and is ready to use. It is recommended that tools with gears be regreased with a special gear lubricant at every brush change.

CARBON BRUSHES

The brushes and commutator in your tool have been engineered for many hours of dependable service. To maintain peak efficiency of the motor, we recommend every two to six months the brushes be examined. Only genuine Bosch replacement brushes specially designed for your tool should be used.

BEARINGS

After about 300-400 hours of operation, or at every second brush change, the bearings

should be replaced at Bosch Factory Service Center or Authorized Bosch Service Station. Bearings which become noisy (due to heavy load or very abrasive material cutting) should be replaced at once to avoid overheating or motor failure.

Cleaning

To avoid accidents always

disconnect the tool from the power supply before cleaning or performing any maintenance. The tool may be cleaned

most effectively with compressed dry air.

Always wear safety goggles when cleaning tools with compressed air.

Ventilation openings and switch levers must be kept clean and free of foreign matter. Do not attempt to clean by inserting pointed objects through openings.

Certain cleaning agents and

solvents damage plastic parts. Some of these are: gasoline, carbon

tetrachloride, chlorinated cleaning solvents, ammonia and household detergents that contain ammonia.

WARNING

Maintenance

Accessories

If an extension cord is

necessary, a cord with adequate size conductors that is capable of carrying the current necessary for your tool must be used. This will prevent

excessive voltage drop, loss of power or overheating. Grounded tools must use 3wire extension cords that have 3-prong plugs and receptacles.

NOTE: The smaller the gauge number, the

heavier the cord.

RECOMMENDED SIZES OF EXTENSION CORDS

120 VOLT ALTERNATING CURRENT TOOLS

CAUTION

WARNING

* 10 Sanding belts * Auxiliary handle * Carrying case

** Bench Mount kit ** Vacuum Hose

(*= standard equipment) (**= optional accessories)

Tool’s

Ampere

Rating

Cord Size in A.W.G.

Wire Sizes in mm

3-6 6-8

8-10 10-12 12-16

18 16 16 14 .75 .75 1.5 2.5 18 16 14 12 .75 1.0 2.5 4.0 18 16 14 12 .75 1.0 2.5 4.0 16 16 14 12 1.0 2.5 4.0 — 14 12 — — — — — —

25 50 100 150 15 30 60 120

Cord Length in Feet Cord Length in Meters

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