Skil 7490 Instruction 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

Consumer Information

Renseignement des consommateurs

Información para el consumidor

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

1-877-SKIL999 (1-877-754-5999) http://www.skil.com

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

7490

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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

WARNING

Power Tool Safety Rules

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Safety Rules for Orbital Sanders

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.

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.

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

occur if sander is plugged in while changing an accessory.

Your tool is equipped with a dust canister, empty it frequently, after completion of sanding and before storing the sander. Be

extremely careful of dust disposal, materials in fine particle form may be explosive. Do not throw sanding dust on an open fire. Combustion from mixture of varnishes, lacquers, polyurethane, oil or water with dust particles can occur if there is a static discharge, spark introduced in the box, or excessive heat.

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.

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

Do not use PSA pad on random orbit sanders whose speed exceeds 12,000/min. Exceeding the maximum

operating speed of pad may cause pad to rupture or fly apart during use, striking user or bystanders.

Do not use sandpaper intended for larger sanding pads. Larger sandpaper will extend

beyond the sanding pad causing snagging, tearing of the paper or kick-back. Extra paper extending beyond the sanding pad can also cause serious lacerations.

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.

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Keep the cord away from the spinning pad and sandpaper. The cord can become

entangled with the pad.

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 chemicallytreated 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

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

NOTE: For tool specifications refer to the nameplate on your tool.

MAXIMUM CAPACITIES Pad diameter 5" (125mm) Abrasive diameter 5" (125mm)

Random Orbit Sander

CORD

RELEASE

TABS

BACKING PAD

DUST PORT

ABRASIVE DISC

SWITCH

VENTILATION

OPENINGS

MOTOR

HOUSING

VENTILATION

OPENINGS

DUST

CANISTER

LID

DUST

CANISTER

FIG. 2

FIG. 1

TAB

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Operating Instructions

ROCKER “ON/OFF” SWITCH

TO TURN THE TOOL "ON" depress the dust-protected switch to the number “I” position.

TO TURN THE TOOL "OFF": depress switch to the number “0” position.

INSTALLING ACCESSORIES

Your random orbit sander uses hook-andloop backed accessories, which firmly grip the pad when applied with moderate pressure. To change the accessory, merely peel off the old accessory, remove dust from the pad if necessary, and press the new accessory in place. Be sure to align the sanding disc holes with the holes in the backing pad to allow the dust extraction system to function.

After considerable service the pad surface will become worn, and the pad must be replaced when it no longer offers a firm grip. If you are experiencing premature wearout of the pad facing, decrease the amount of pressure you are applying during operation of the tool.

DUST COLLECTION CANISTER

The integral dust extraction system collects sanding dust in canister supplied with your sander. For maximum efficiency, the dust canister should be emptied frequently during operation.

Your tool is equipped with

a dust canister, empty it frequently, after completion of sanding and before storing the sander. Be

REMOVING AND INSTALLING

DUST CANISTER

To remove dust canister, squeeze release tabs on both sides of canister and simply pull away from the tool (Fig. 1).

To install dust canister, align dust port with hole in canister and push canister onto tool until it locks into place.

CLEANING AND EMPTYING

THE DUST CANISTER

To empty canister, hold canister as shown and maintain a firm grip (Fig. 2). Firmly push upward on tab on corner of lid, and remove from canister. Knock excess dust out of the micro filter, or remove dust with your fingers or a soft brush.

You may notice that all the dust may not come out of the canister. This will not affect sanding performance but will reduce dust collection efficiency.

NOTE: Do not wash the micro filter with soap and water. Dust may become more firmly lodged in the pores, which will reduce dust collection, and damage the micro filter.

SANDING: open-coat aluminum oxide sanding discs are recommended for most wood or metal sanding applications, as this synthetic material cuts quickly and wears well. Some applications, such as plastics, glass, or stone require silicon carbide discs, which have a very sharp cutting edge. For best results, use Skil sanding and polishing accessories which are of superior quality and are carefully selected to produce professional quality results with your sander.

With the workpiece firmly secured, depress switch while applying the pad to the work surface. DO NOT apply excessive pressure as this will slow the pad action, and DO NOT start the tool and bring it up to speed before applying to the work; swirl marks will result in either case. In general, higher speeds and

moderate pressure will give the best results. If faster removal is desired, DO NOT INCREASE PRESSURE ON THE TOOL; use a coarser grade of abrasive. Move the sander in long sweeping strokes, parallel to the grain using some lateral motion to overlap the strokes by as much as 75%. The random orbit action allows cross-grain sanding, but be careful not to tilt the sander near edges, or undesirable rounding may result.

If the surface is rough, begin with coarser grits and then complete the surfacing with medium and fine abrasives. Because the random orbit action is so effective, it is often possible to begin sanding with a medium grit disc and go directly to fine finishing. To avoid uneven results, do not skip more than one grit size when going from coarser to finer, and do not

“Tool Tips”

WARNING

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sand in one area for too long. When the job is completed, release switch, and gently lift the tool from the work surface at the same time.

POLISHING: The random orbit sander may be fitted with a foam buffing pad or polishing bonnet to polish or remove scratches from painted or finished surfaces, plastics, and even glass. The tool is operated in much the same way as when sanding, but the following points should be observed;

Apply the compound to the surface, and use the sponge applicator pad with light pressure and a circular motion to remove scratches and restore weathered finishes. Use only as much compound as necessary, and clean the sponge frequently during use.

When initial polishing is completed, wipe away any excess compound with a soft towel, and

then polish the surface to its final finish with the polishing bonnet. Use smooth overlapping strokes for best results.

It is important to note that the orbit speed of the random orbit sander is not the same as the RPM of a standard right-angle polisher. The random orbit action is much like a powerful hand polishing action, and therefore does not have the high speeds at the edge of the pad which can burn the work surface. Practice on a hidden area or test surface until you have determined the tool is suitable for your polishing application.

Clean the buffing pad and polishing bonnet with mild detergents and warm water. DO NOT use solvents.

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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 Skil Factory Service Center or Authorized Skil Service Station.

TOOL LUBRICATION

Your Skil 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 Skil 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 Skil Factory Service Center or Authorized Skil 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

CAUTION

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 3-wire 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

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

WARNING

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