MasterForce 241-0805 User manual

Brand: MasterForce

Model: 241-0805

Category: Power tools

Type: User manual

MasterForce 241-0805 is a random orbit sander that can be used for a variety of sanding tasks, from removing paint and varnish to smoothing rough surfaces. The sander has a powerful motor that provides plenty of power for even the most demanding jobs, and its random orbit action ensures a smooth, swirl-free finish. The sander also features a variable speed control, so you can adjust the speed to match the task at hand. The MasterForce 241-0805 is a versatile and powerful sander that is perfect for a variety of sanding tasks.

241-0805

Random Orbit Sander

For questions / comments, technical assistance or repair parts –

Please Call Toll Free: 1-866-917-4374. (M-F 8:30am-5:00pm Est.)

OPERATOR’S MANUAL

CAUTION:

To Reduce The Risk Of Injury, User Must Read And

Understand Operator’s Manual. Save These Instructions For

Future Reference.

TABLE OF CONTENTS

Safety Symbols ......................................................... Page 2

Safety Instructions ...................................................... Page 3

Overview/Specifications ................................................. Page 7

Assembly ............................................................. Page 8

Operation ............................................................ Page 10

Maintenance .......................................................... Page 12

Troubleshooting ....................................................... Page 13

Warranty .............................................................Page 14

Page 2

SAFETY SYMBOLS

Some of these following symbols may be used on this tool. Please study them and learn their

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

more safely.

WARNING:

To ensure safety and reliability, all repairs should be performed by a

qualiﬁed service technician.

Symbol

Name

Designation / Explanation

V Volts Voltage

A Amperes Current

Hz Hertz Frequency (cycles per second)

W Watts Power

∿

Alternating current Type of current

�

Direct current Type or characteristic of current

No-load speed Rotational speed at no load

Class II construction Double insulated construction

.../min

Per minute

Revolutions, strokes, surface speed

orbits, etc., per minute

Wear safety goggles

WARNING:

The operation of any

power tool can result in foreign objects

being thrown into your eyes, which can

result in severe eye damage. Before

beginning power tool operation, always

wear safety goggles or safety glasses

with side shields and a full-face shield

when needed. We recommend a Wide

Vision Safety Mask for use over eye-

glasses or standard safety glasses with

side shields. Always use eye protection

which is marked to comply with

ANSI Z87.1.

The purpose of safety symbols is to attract your attention to possible dangers. The

safety symbols and the explanations with them deserve your careful attention and

understanding. The symbol warnings do not, by themselves, eliminate any danger. The

instructions and warnings they give are not substitutes for proper accident prevention

measures.

WARNING:

Be sure to read and understand all safety instructions in this manual,

including all safety alert symbols such as “DANGER,” “WARNING,” and “CAUTION”

before using this tool. Failure to follow all instructions listed below may result in electric

shock, fire, and/or serious personal injury.

SYMBOL MEANING

SAFETY ALERT SYMBOL: Indicates DANGER, WARNING, OR CAUTION.

May be used in conjunction with other symbols or pictographs.

Indicates an imminently hazardous situation, which, if not avoided,

will result in death or serious injury.

Indicates a potentially hazardous situation, which, if not avoided,

could result in death or serious injury.

Indicates a potentially hazardous situation, which, if not avoided,

could result in minor or moderate injury.

NOTICE:

(Without Safety Alert Symbol) Indicates a situation that may result in property

damage.

SAVE THESE INSTRUCTIONS!

WARNING:

Page 3

SAFETY INSTRUCTIONS

DANGER:

CAUTION:

Page 4

SAFETY INSTRUCTIONS

KNOW THE TOOL

Carefully read this operating manual and

all labels before using this tool. Keep this

manual available for future reference.

IMPORTANT

This tool should only be serviced by a

qualified service technician. For more

information, call the toll free helpline at

1-866-917-4374.

READ ALL INSTRUCTIONS THOROUGHLY.

GENERAL SAFETY RULES FOR

POWER TOOLS

WARNING:

To reduce the risk of

injury, the user must read the Owner’s

Manual.

WARNING:

Read all safety

warnings and instructions. Failure to

follow the warnings and instructions may

result in electric shock, ﬁre and/or serious

injury.

Save all warnings and instructions for

future reference.

The term power tool in the warnings

refers to your mains-operated (corded)

power tool or battery-operated (cordless)

power tool.

WORK AREA SAFETY

1. Keep the work area clean and well lit.

Cluttered or dark areas invite accidents.

2. 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.

3. Keep children and bystanders away

while operating a power tool. Distractions

can cause you to lose control.

ELECTRICAL SAFETY

1. Power tool plugs must match the

outlet. Never modify the plug in any way.

Do not use any adapter plugs with

earthed (grounded) power tools.

Unmodified plugs and matching outlets

will reduce risk of electric shock.

2. Avoid body contact with earthed or

grounded surfaces such as pipes,

radiators, ranges and refrigerators. There

is an increased risk of electric shock if your

body is earthed or grounded.

3. Do not expose power tools to rain or

wet conditions. Water entering a power

tool will increase the risk of electric shock.

4. Do not abuse the cord. Never use the

cord for carrying, pulling or unplugging

the power tool. Keep the cord away from

heat, oil, sharp edges or moving parts.

Damaged or entangled cords increase the

risk of electric shock.

5. When operating a power tool

outdoors, use an extension cord suitable

for outdoor use. Use of a cord suitable

for outdoor use reduces the risk of electric

shock.

1 20V ~ 6 0 H z

Page 5

POWER TOOL USE AND CARE

1. Do not force the power tool. Use the

correct power tool for your application.

The correct power tool will do the job

better and more safely at the rate for

which it was designed.

2. Do not use the power tool if the switch

does not turn it on and off. Any power

tool that cannot be controlled with

the switch is dangerous and must be

repaired.

3. Disconnect the plug from the power

source and/or the battery pack from

the power tool before making any

adjustments, changing accessories, or

storing power tools. Such preventive

safety measures reduce the risk of starting

the power tool accidentally.

4. Store idle power tools out of the reach

of children and do not allow persons

unfamiliar with the power tool or

these instructions to operate the power

tool. Power tools are dangerous in the

hands of untrained users.

5. Maintain power tools. Check for

misalignment or binding of moving parts,

breakage of parts and any other condition

that may affect the power tool’s operation.

If damaged, have the power tool repaired

before use. Many accidents are caused by

poorly maintained power tools.

6. Keep cutting tools sharp and clean.

Properly maintained cutting tools with

sharp cutting edges are less likely to bind

and are easier to control.

7. Use the power tool, accessories,

tool bits etc. in accordance with these

instructions, taking into account the

working conditions and the work to be

performed. Use of the power tool for

operations different from those intended

could result in a hazardous situation.

SAFETY INSTRUCTIONS

6. If operating a power tool in a damp

location is unavoidable, use a power

supply that is protected by a ground fault

circuit interrupter (GFCI). The use of a GFCI

reduces the risk of electric shock.

PERSONAL SAFETY

1. Stay alert, watch what you are doing

and use common sense when operating

a power tool. Do not use the 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.

2. Use personal protective equipment.

Always wear eye protection. Protective

equipment such as dust mask, non-skid

safety shoes, hard hat, or hearing

protection, used for appropriate conditions,

will reduce personal injuries.

3. Prevent unintentional starting. Ensure

that the switch is in the off-position before

connecting to power source and/or

battery pack, picking up or carrying the tool.

Carrying power tools with your finger on the

switch or energizing power tools that have

the switch on invites accidents.

4. Remove any adjusting key or wrench

before turning the power tool on. A wrench

or a key left attached to a rotating part of

the power tool may result in personal injury.

5. Do not overreach. Keep proper footing

and balance at all times. This enables

better control of the power tool in

unexpected situations.

6. Dress properly. Do not wear loose

clothing or jewelry. Keep your hair,

clothing and gloves away from moving

parts. Loose clothes, jewelry or long hair

can be caught in moving parts.

7. If devices are provided for the

connection of dust extraction and

collection facilities, ensure that these are

connected and properly used. Use of

these devices can reduce dust-related

hazards.

Page 6

SAFETY INSTRUCTIONS

SERVICE

1. Have your power tool serviced by

a qualified repair person using only

identical replacement parts. This will

ensure that the safety of the power tool

is maintained.

SPECIFIC SAFETY RULES

FOR SANDER

1. Hold the tool by the insulated

gripping surfaces when performing an

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.

2. Always wear safety goggles and a

dust mask when sanding, especially

when sanding over-head.

3. A suitable breathing respirator must

be worn while sanding chemically

pressure treated objects.

4. The machine is not suitable for wet

sanding.

5. Do not use sanding paper larger than

needed. Extra paper extending beyond the

sanding pad can cause serious lacerations.

6. Secure the workpiece. A workpiece

clamped with clamping devices or in a vice

is held more secure than by hand.

7. Attach the dust box to the tool and

empty it frequently. Do not throw sanding

dust on an open fire because materials in

fine particle form may be explosive.

DANGER:

People with electronic

devices, such as pacemakers, should

consult their physician(s) before using this

product. Operation of electrical equipment

in close proximity to a heart pacemaker

could cause interference or failure of the

pacemaker.

WARNING:

Some dust created by

power sanding, sawing, grinding, drilling

and other construction activities contains

chemicals known to the state of California

to cause cancer, birth defects or other re-

productive harm. Some examples of these

chemicals are:

• Lead from lead-based paints

• Crystalline silica from bricks and ce-

ment and other masonry products, and

• Arsenic and chromium from chemically-

treated lumber.

Your risk from these exposures varies, de-

pending 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.

Page 7

OVERVIEW

WARNING:

Do not allow familiarity with your random orbit sander to make you

careless. A fraction of a second of carelessness is enough to cause severe injury.

Dust-sealed ON/OFF rocker switch

Cord guard

Sanding pad

Speed selector

Dust box

SPECIFICATIONS

Motor 120 V 60 Hz 2.8 A

Speed 7000–13000 OPM (no load)

Pad size 5”

Pad type

Hook and loop fastening system with

8 holes

Weight 3 lbs. 12 oz. (1.68 kg)

Page 8

ASSEMBLY

CONTENTS

Sander, sanding discs (5pcs), dust box, soft

bag and operator’s manual

Remove the random orbit sander from the

carton and examine it carefully. Do not

discard the carton or any packaging

material until all parts have been examined.

If any part of the sander is missing or

damaged, do not plug the sander in until

the damaged part is repaired or replaced.

WARNING:

To avoid injury,

ALWAYS turn the switch to the OFF

position and disconnect the random orbit

sander from the power outlet before

installing or changing the abrasive discs

or dust bag attachment.

INSTALLING AND REMOVING

THE ABRASIVE DISC (FIG. 1)

To install:

1. Remove all sanding dust or dirt from

the sanding pad.

2. Align the holes on the abrasive disc

with the holes in the sanding pad,

making sure it is centered and that the

edges are aligned with the edges of

the sanding pad.

NOTICE: The holes in the abrasive disc

must line up with the holes in the sanding

pad in order for the dust collection system

to function properly.

3. Press the abrasive disc to the pad.

To remove:

1. Peel the disc off the sanding pad.

INSTALLING AND REMOVING

THE DUST BOX (FIG. 2)

To attach the dust box (Fig. 2):

1. Unplug the sander.

2. Align the raised rib on the dust box with

the grooves of the sander, and then

attach the dust box to the sander.

NOTICE: Make sure that the dust box

is secured to the tool before beginning

operation.

To detach the dust box:

1. Unplug the sander.

2. Pull up on the dust box and remove it

from the tool.

NOTICE: When placing the dust box on

the tool, be sure that the raised rib on the

dust box aligns with the groove on the

sander and that the dust box snaps into

place properly. Improper attachment of

the dust box can cause damage to

internal components.

FIG. 1

ATTACH

DETACH

FIG. 2

Page 9

ASSEMBLY

To empty dust box drawer (Fig. 3–4)

1. Press the release button on the dust

box door and open the door fully

(Fig. 3).

2. Pull out the dust drawer and empty it

(Fig. 4).

3. Put the dust drawer back into the dust

box. Close the dust box door, making

sure the released button is engaged

securely.

DUST-SEALED ON/OFF

ROCKER SWITCH

This random orbit sander is equipped

with an ON/OFF rocker switch that is

located on the front of the handle.

1. To turn the sander ON, push the I side

of the rocker switch.

2. To turn the sander OFF, push the O

side of the rocker switch.

SPEED SELECTOR (FIG. 5)

Use a practice piece of material to

determine the right speed for each job.

Vary the speed in order to find the best

speed for the accessory that you are

using and the job to be done.

FIG. 3

FIG. 5

FIG. 4

Page 10

OPERATION

GENERAL SANDING

WARNING:

Finish sanding can

produce clouds of ﬁne sanding dust that

could ignite in the presence of sparks or

an open ﬂame. To avoid injury, always use

your sander in a well-ventilated area.

WARNING:

For your safety, and in

order to avoid damage, only turn the

sander ON and OFF when the sander is

contacting a surface.

1. Place the sander on the workpiece

BEFORE turning the switch to the ON

position. If the sander is started before

making contact with the workpiece,

the free-floating workpad may cause

scratches.

2. Sand using a circular or elliptical

motion while applying slight pressure.

3. Random orbit sanders can be moved

across the workpiece in any direction.

If you are sanding wood, you can

sand in any direction, regardless of

the grain of the wood.

4. The amount of downward pressure

will affect the rotation speed and the

sanding results:

a. Light pressure: recommended for

fine work.

b. Moderate pressure: recommended

for rough work.

c. Heavy pressure: not recommended;

does not allow the disc to rotate

properly.

5. Keep the sanding disc flat on the

workpiece. Using the edges of the pad

or tipping the sander may cause an

uneven finish, and may reduce the life of

the sanding pad.

6. Keep the sander moving in broad, even

strokes across the workpiece. Sanding

in one spot for too long may cause

gouging and uneven results.

7. Random orbit sanders work more

aggressively than simple orbital sanders.

Check your workpiece frequently.

8. Begin sanding with a coarser grit

sandpaper and gradually use finer and

finer grits until the desired finish is

achieved. Do not switch from a coarse

grit to a very fine grit in one step.

SANDING OPERATION

WARNING:

To avoid injury, always

unplug the sander before attaching or

removing sanding discs or the dust box.

1. Attach the sanding disc and the dust

box.

2. Place the sander on the workpiece,

and turn the sander ON.

3. Keep the sanding disc flat on the

workpiece and constantly moving

across the workpiece. Use long,

sweeping circular or elliptical strokes.

4. When you are finished sanding, switch

the tool OFF and wait until the sander

has come to a complete stop before

removing it from the workpiece.

REMOVING PAINT OR VARNISH

1. When removing several layers of paint

or varnish, remove as much as possible

with a paint or varnish remover.

2. Scrape the residue off with a putty

knife or scraping tool, and allow the

surface to cool and dry before sanding.

3. Select and install a coarse grit

sandpaper.

4. Keep the sander moving over new areas

in order to avoid heating and softening

the old coating.

5. Work in wide, overlapping strokes in

order to achieve a uniform finish.

6. As the workpiece begins to show through

the old coating, switch to a medium grit

sandpaper in order to avoid scratching

the surface. Gradually switch to a finer

grit until you achieve the desired finish.

Page 11

SANDPAPER SELECTION

(PURCHASE SEPARATELY)

Sandpaper can be made from various grit

materials. The grit material and coarseness

of the sandpaper should be selected

according to the type of workpiece.

WORKPIECE MATERIAL GRIT MATERIAL

Fine woodwork Gamet or aluminium oxide

Rough woodwork Aluminium zirconia or ceramic

Manufactured wood products Silicon carbide or aluminium oxide

Solid surfacing material Silicon carbide or aluminium oxide

Metals Emery or aluminium oxide

Sandpaper is also graded according to

coarseness. Start your work with an

abrasive grit that is just coarse enough

to remove the high spots and excessive

roughness. Follow with a second sanding,

using a grit that is one or two grades

finer. Continue with successively finer

grits until you achieve the desired finish.

Do not switch from a coarse grit to a very

fine grit in one step. It may be difficult to

remove the marks made by the coarse

grit. Use the coarsest grits for the roughing

operation, and finish by using successively

finer grits.

GRIT PURPOSE

Coarse Grit 60–80

Initial sanding on rougher surfaces.

For fast stock removal.

Rough sanding and stripping of painted and rusted

surfaces.

Medium Grit 100–140

Intermediate sanding.

Removal of minor surface imperfections.

Fine Grit 150–220

Fine sanding.

Sanding prior to staining, priming, or sealing.

OPERATION

Page 12

MAINTENANCE

Before each use inspect the random

orbit sander, the ON/OFF switch, and the

cord for damage. Check for damaged,

missing, or worn parts. Check for loose

screws, misalignment or binding of

moving parts, or any other condition that

may affect the operation. If abnormal

vibration or noise occurs, turn the tool

off immediately, and have the problem

corrected before further use.

If the supply cord is damaged, it must be

replaced by a specially prepared cord

available through the service organization.

The tool should be unplugged from the

power supply before cleaning or

performing any maintenance. Using

compressed air may be the most

effective cleaning method. Always wear

safety goggles when cleaning tools with

compressed air.

WARNING:

Do not let brake ﬂuids,

gasoline, petroleum-based products,

penetrating oil, etc., come into contact

with plastic parts. They contain chemicals

that can damage, weaken, or destroy

plastic.

WARNING:

When servicing, use

only identical replacement parts. The use

of any other parts may create a hazard or

cause damage to the product.

WARNING:

Use only accessories

that are recommended for your model by

the manufacturer. Accessories that may

be suitable for one tool may become

hazardous when used on another tool.

WARNING:

Maintain tools with

care. Properly maintained tools work to

their best advantage and are easier to

control.

WARNING:

To ensure safety and

reliability, all repairs should be performed

by a qualiﬁed service technician.

WARNING:

If the supply cord is

damaged, it must be replaced by a

specially prepared cord available through

the service organization.

REPLACING THE

SANDER BASE PAD

WARNING:

Failure to unplug the

tool from the power source when

assembling parts, making adjustments,

or changing application tools could

result in accidental starting and cause

serious injury.

1. Unplug the sander.

2. Loosen the 4 screws on the base pad

with a Philips screwdriver (available sep-

arately). Remove the base pad from the

sander (Fig. 6).

3. Remove the bearing cover from the base

pad.

4. Clean and empty the dust that has

accumulated in the sander with a brush

or compressed air.

FIG. 6

Bearing cover

5. Press the bearing cover down onto the

new base pad. Make sure that the 4

holes on the bearing cover are aligned

with the 4 mounting holes on the base

pad.

6. Place the sander upside-down and

attach the new base pad to the sander.

Page 13

TROUBLESHOOTING

PROBLEM

CAUSE

SUGGESTED CORRECTIVE ACTION

This sander will

not start.

The sander is not plugged

into a power source.

Plug the sander into a power source.

7. Tighten the 4 screws with a Philips

screwdriver.

NOTICE: Using compressed air may be the

most effective cleaning method. Always

wear safety goggles when cleaning tools

with compressed air.

NOTICE: Apply some lubricant on the sides

of the base pad for prolonged tool life.

MAINTENANCE

Page 14

SAVE YOUR RECEIPTS

THIS WARRANTY IS VOID WITHOUT THEM

RANDOM ORBIT SANDER

WARRANTY

90-DAY MONEY BACK GUARANTEE:

This MASTERFORCE

brand power tool carries our 90-DAY Money Back

Guarantee. If you are not completely satisfied with your MASTERFORCE

brand

power tool for any reason within ninety (90) days from the date of purchase, return

the tool with your original receipt to any MENARDS

retail store, and we will provide

you a refund – no questions asked.

3-YEAR LIMITED WARRANTY:

This MASTERFORCE

brand power tool carries our famous No Hassle 3-Year

Limited Warranty to the original purchaser. If, during normal use, this

MASTERFORCE

power tool breaks or fails due to a defect in material or

workmanship within three (3) years from the date of original purchase, simply bring

this tool with the original sales receipt back to your nearest MENARDS

retail store.

At its discretion, MASTERFORCE

agrees to have the tool or any defective part(s)

repaired or replaced with the same or similar MASTERFORCE

product or part

free of charge, within the stated warranty period, when returned by the original

purchaser with original sales receipt. Not withstanding the foregoing, this limited

warranty does not cover any damage that has resulted from abuse or misuse of

the Merchandise. This warranty: (1) excludes expendable parts including but not

limited to blades, brushes, belts, bits, light bulbs, and/or batteries; (2) shall be void

if this tool is used for commercial and/or rental purposes; and (3) does not cover any

losses, injuries to persons/property or costs. This warranty does give you specific

legal rights and you may have other rights, which vary from state to state. Be

careful, tools are dangerous if improperly used or maintained. Seller’s employees

are not qualified to advise you on the use of this Merchandise. Any oral

representation(s) made will not be binding on seller or its employees. The rights

under this limited warranty are to the original purchaser of the Merchandise and may

not be transferred to any subsequent owner. This limited warranty is in lieu of all

warranties, expressed or implied including warranties or merchantability and fitness

for a particular purpose. Seller shall not be liable for any special, incidental, or

consequential damages. The sole exclusive remedy against the seller will be for the

replacement of any defects as provided herein, as long as the seller is willing or

able to replace this product or is willing to refund the purchase price as provided

above. For insurance purposes, seller is not allowed to demonstrate any of these

power tools for you.

For questions / comments, technical assistance or repair parts – Please Call Toll

Free at: 1-866-917-4374. (M-F 8:30am-5:00pm Est.)

Page 15

08/2014

MasterForce 241-0805 User manual

Brand: MasterForce

Model: 241-0805

Category: Power tools

Type: User manual

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MasterForce 241-0805 User manual

MasterForce 241-0805 User manual

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