Chicago Electric 66876 Set Up And Operating Instructions Manual

Brand: Chicago Electric

Model: 66876

Category: Power tools

Type: Set Up And Operating Instructions Manual

18V CORDLESS

ANGLE GRINDER

66876

SET UP AND OPERATING INSTRUCTIONS

Distributed exclusively by Harbor Freight Tools

3491 Mission Oaks Blvd., Camarillo, CA 93011

Visit our website at: http://www.harborfreight.com

Read this material before using this product.

Failure to do so can result in serious injury.

SAVE THIS MANUAL.

2009 by Harbor Freight Tools

contained herein may be reproduced in any shape or form without the express written consent of Harbor

Freight Tools. Diagrams within this manual may not be drawn proportionally. Due to continuing improvements,

actual product may differ slightly from the product described herein.

For technical questions or replacement parts, please call 1-800-444-3353.

SKU 66876 For technical questions, please call 1-800-444-3353. Page 2

CONTENTS

IMPORTANT SAFETY

INFORMATION ............................3

GENERAL POWER TOOL

SAFETY WARNINGS.......................3

SAFETY WARNINGS COMMON

FOR GRINDING OPERATIONS ......5

KICKBACK AND RELATED

WARNINGS ......................................8

SAFETY WARNINGS SPECIFIC

FOR GRINDING OPERATIONS ......9

VIBRATION SAFETY .........................9

GROUNDING ............................... 10

GROUNDED TOOLS: TOOLS

WITH THREE PRONG PLUGS .....10

DOUBLE INSULATED TOOLS:

TOOLS WITH TWO PRONG

PLUGS ...........................................10

EXTENSION CORDS .......................11

SYMBOLOGY ...................................11

SPECIFICATIONS ........................12

UNPACKING ................................12

COMPONENTS ................................12

INSTRUCTIONS FOR PUTTING

INTO USE .................................. 12

ASSEMBLY.......................................13

OPERATING INSTRUCTIONS .... 14

THE BATTERY .................................14

TOOL SET UP ..................................14

WORK PIECE AND WORK AREA

SET UP ..........................................16

GENERAL OPERATING

INSTRUCTIONS ............................16

MAINTENANCE AND

SERVICING ...............................17

CLEANING, MAINTENANCE, AND

LUBRICATION ...............................17

ACCESSORY STORAGE AND

HANDLING ....................................17

TROUBLESHOOTING ......................18

PARTS LIST ................................. 19

ASSEMBLY DIAGRAM ................20

LIMITED 90 DAY WARRANTY .... 21

SKU 66876 For technical questions, please call 1-800-444-3353. Page 3

SAVE THIS MANUAL

Keep this manual for the safety warn-

ings and precautions, assembly, operat-

ing, inspection, maintenance and cleaning

procedures. Write the product’s serial

number in the back of the manual near the

assembly diagram (or month and year of

purchase if product has no number). Keep

this manual and the receipt in a safe and

dry place for future reference.

IMPORTANT SAFETY

INFORMATION

In this manual, on the labeling,

and all other information provid-

ed with this product:

This is the safety alert

symbol. It is used to alert

you to potential personal

injury hazards. Obey all

safety messages that

follow this symbol to avoid

possible injury or death.

DANGER indicates

a hazardous

situation which, if not

avoided, will result in death or

serious injury.

WARNING

indicates a

hazardous situation which, if

not avoided, could result in

death or serious injury.

CAUTION, used

with the safety

alert symbol, indicates a

hazardous situation which, if

not avoided, could result in

minor or moderate injury.

NOTICE is used to

address practices

not related to personal injury.

CAUTION, without

the safety alert

symbol, is used to address

practices not related to

personal injury.

General Power Tool Safety

Warnings

WARNING Read all safety

warnings and instructions.

Failure to follow the warnings and

instructions may result in electric

shock, re and/or serious injury.

Save all warnings and

instructions for future reference.

The term ″power tool″ in the

warnings refers to your battery-

operated (cordless) power tool.

Work area safety1.

Keep work area clean and well lit. a.

Cluttered or dark areas invite acci-

dents.

Do not operate power tools in b.

explosive atmospheres, such as in

the presence of ammable liquids,

gases or dust. Power tools create

sparks which may ignite the dust or

fumes.

Keep children and bystanders c.

away while operating a power tool.

Distractions can cause you to lose

control.

Electrical safety2.

Power tool plugs must match the a.

outlet. Never modify the plug in

any way. Do not use any adapter

plugs with grounded power tools.

SKU 66876 For technical questions, please call 1-800-444-3353. Page 4

Unmodied plugs and matching out-

lets will reduce risk of electric shock.

Avoid body contact with grounded b.

surfaces such as pipes, radiators,

ranges and refrigerators. There is

an increased risk of electric shock if

your body is grounded.

Do not expose power tools to rain c.

or wet conditions. Water entering

a power tool will increase the risk of

electric shock.

Do not abuse the cord. Never use d.

the cord for carrying, pulling or

unplugging the power tool or bat-

tery pack. Keep cord away from

heat, oil, sharp edges or moving

parts. Damaged or entangled cords

increase the risk of electric shock.

Personal safety3.

Stay alert, watch what you are do-a.

ing and use common sense when

operating a power tool. Do not use

a power tool while you are tired

or under the inuence of drugs,

alcohol or medication. A moment

of inattention while operating power

tools may result in serious personal

injury.

Use safety equipment. Always b.

wear eye protection. Safety equip-

ment such as a dust mask, non-skid

safety shoes, hard hat, or hearing

protection used for appropriate condi-

tions will reduce personal injuries.

Prevent unintentional starting. c.

Ensure the switch is in the off-po-

sition before connecting to power

source and/or battery pack, pick-

ing up or carrying the tool. Carry-

ing power tools with your nger on

the switch or energizing power tools

that have the switch on invites acci-

dents.

Remove any adjusting key or d.

wrench before turning the power

tool on. A wrench or a key left at-

tached to a rotating part of the power

tool may result in personal injury.

Do not overreach. Keep proper e.

footing and balance at all times.

This enables better control of the

power tool in unexpected situations.

Dress properly. Do not wear loose f.

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.

If devices are provided for the con-g.

nection of dust extraction and col-

lection facilities, ensure these are

connected and properly used. Use

of these devices can reduce dust-

related hazards.

Only use safety equipment that h.

has been approved by an appropri-

ate standards agency. Unapproved

safety equipment may not provide

adequate protection. Eye protection

must be ANSI-approved and breath-

ing protection must be NIOSH-ap-

proved for the specic hazards in the

work area.

Power tool use and care4.

Do not force the power tool. Use a.

the correct power tool for your ap-

plication. The correct power tool will

do the job better and safer at the rate

for which it was designed.

Do not use the power tool if the b.

switch does not turn it on and off.

Any power tool that cannot be con-

SKU 66876 For technical questions, please call 1-800-444-3353. Page 5

trolled with the switch is dangerous

and must be repaired.

Disconnect the plug from the c.

power source and/or the battery

pack from the power tool before

making any adjustments, chang-

ing accessories, or storing power

tools. Such preventive safety mea-

sures reduce the risk of starting the

power tool accidentally.

Store idle power tools out of the d.

reach of children and do not allow

persons unfamiliar with the power

tool or these instructions to oper-

ate the power tool. Power tools are

dangerous in the hands of untrained

users.

Maintain power tools. Check for e.

misalignment or binding of moving

parts, breakage of parts and any

other condition that may affect the

power tool’s operation. If dam-

aged, have the power tool repaired

before use. Many accidents are

caused by poorly maintained power

tools.

Use the power tool and acces-f.

sories 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.

Battery tool use and care5.

Recharge only with the charger a.

specied by the manufacturer. A

charger that is suitable for one type of

battery pack may create a risk of re

when used with another battery pack.

Use power tools only with speci-b.

cally designated battery packs.

Use of any other battery packs may

create a risk of injury and re.

When battery pack is not in use, c.

keep it away from other metal ob-

jects, like paper clips, coins, keys,

nails, screws or other small metal

objects, that can make a connec-

tion from one terminal to another.

Shorting the battery terminals togeth-



Under abusive conditions, liquid d.

may be ejected from the battery;

avoid contact. If contact acciden-

tally occurs, ush with water. If

liquid contacts eyes, additionally

seek medical help. Liquid ejected

from the battery may cause irritation

or burns.

Service6.

Have your power tool serviced by a.

a qualied repair person using

only identical replacement parts.

This will ensure that the safety of the

power tool is maintained.

Safety Warnings Common for

Grinding Operations

This power tool is intended to 1.

function as a grinder. Read all

safety warnings, instructions, illus-

trations and specications pro-

vided with this power tool. Failure

to follow all instructions listed below



or serious injury.

Operations such as abrasive cut-2.

ting, sanding, wire brushing or

polishing are not recommended to

be performed with this power tool.

Operations for which the power tool

was not designed may create a haz-

ard and cause personal injury.

SKU 66876 For technical questions, please call 1-800-444-3353. Page 6

Do not use accessories which 3.

are not specically designed and

recommended by the tool manu-

facturer. Just because the accessory

can be attached to your power tool, it

does not assure safe operation.

The rated speed of the accessory 4.

must be at least equal to the maxi-

mum speed marked on the power

tool. Accessories running faster than

their RATED SPEED can break and



The outside diameter and the 5.

thickness of your accessory must

be within the capacity rating of

your power tool. Incorrectly sized

accessories cannot be adequately

guarded or controlled.

The arbor size of wheels, anges, 6.

backing pads or any other acces-

sory must properly t the spindle

of the power tool. Accessories with

arbor holes that do not match the

mounting hardware of the power tool

will run out of balance, vibrate exces-

sively and may cause loss of control.

Do not use a damaged accessory. 7.

Before each use inspect the acces-

sory such as abrasive wheels for

chips and cracks, or backing pad

for cracks, tear or excess wear.

If the power tool or accessory is

dropped, inspect for damage or

install an undamaged accessory.

After inspecting and installing an

accessory, position yourself and

bystanders away from the plane of

the rotating accessory and run the

power tool at maximum no-load

speed for one minute. Damaged

accessories will normally break apart

during this test time.

Wear personal protective equip-8.

ment. Depending on application,

use face shield, safety goggles

or safety glasses. As appropriate,

wear dust mask, hearing protec-

tors, gloves and workshop apron

capable of stopping small abra-

sive or work piece fragments. The

eye protection must be capable of



various operations. The dust mask or



particles generated by your opera-

tion. Prolonged exposure to high in-

tensity noise may cause hearing loss.

Keep bystanders a safe distance 9.

away from work area. Anyone

entering the work area must wear

personal protective equipment.

Fragments of work piece or of a



cause injury beyond immediate area

of operation.

Hold power tool by insulated grip-10.

ping surfaces only, when perform-

ing an operation where the grind-

ing accessory may contact hidden

wiring. Grinding accessory contact-





and shock the operator.

Never lay the power tool down 11.

until the accessory has come to a

complete stop. The spinning acces-

sory may grab the surface and pull

the power tool out of your control.

Do not run the power tool while 12.

carrying it at your side. Accidental

contact with the spinning accessory

could snag your clothing, pulling the

accessory into your body.

SKU 66876 For technical questions, please call 1-800-444-3353. Page 7

Regularly clean the power tool’s 13.

air vents. The motor’s fan will draw

the dust inside the housing and ex-

cessive accumulation of powdered

metal may cause electrical hazards.

Do not operate the power tool near 14.

ammable materials. Sparks could

ignite these materials.

Do not use accessories that re-15.

quire liquid coolants. Using water

or other liquid coolants may result in

electrocution or shock.

Maintain labels and nameplates on 16.

the tool. These carry important safety

information. If unreadable or miss-

ing, contact Harbor Freight Tools for a

replacement.

Avoid unintentional starting. Prepare 17.

to begin work before turning on the

tool.

Do not leave the tool unattended with 18.

the Battery Pack installed. Turn off

the tool, and remove the Battery Pack

before leaving.

Use clamps (not included) or other 19.

practical ways 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.

20. The battery charger gets

hot during use. The

charger’s heat can build

up to unsafe levels and



receive adequate ventilation, due to

an electrical fault, or if it is used in a

hot environment.

-

mable surface. Do not obstruct any

vents on the charger. Especially

avoid placing the charger on car-

pets and rugs; they are not only

ammable, but they also obstruct

vents under the charger.

This product is not a toy. Keep it out 21.

of reach of children.

People with pacemakers should 22.

consult their physician(s) before use.

-

imity to heart pacemaker could cause

pacemaker interference or pacemak-

er failure. In addition, people with

pacemakers should:





on.



avoid electrical shock.



grounded. Ground Fault Circuit Inter-

rupter (GFCI) should also be imple-

mented – it prevents sustained elec-

trical shock.

WARNING: Some dust created by 23.

power grinding, and other construc-

tion activities, contains chemicals

known [to the State of California] to

cause cancer, birth defects or other

reproductive harm. Some examples

of these chemicals are:



-

ment or other masonry products

-

cally treated lumber

Your risk from these exposures var-

ies, 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

SKU 66876 For technical questions, please call 1-800-444-3353. Page 8

approved safety equipment, such as

those dust masks that are specially



particles. (California Health & Safety

Code § 25249.5, et seq.)

WARNING: Handling the cord on 24.

this product will expose you to lead,

a chemical known to the State of

California to cause cancer, and birth

defects or other reproductive harm.

Wash hands after handling. (Califor-

nia Health & Safety Code § 25249.5,

et seq.)

The warnings, precautions, and in-25.

structions discussed in this instruction

manual cannot cover all possible con-

ditions and situations that may occur.

It must be understood by the operator

that common sense and caution are

factors which cannot be built into this

product, but must be supplied by the

operator.

Kickback and Related Warnings

Kickback is a sudden reaction to a

pinched or snagged rotating wheel, back-

ing pad, brush or any other accessory.

Pinching or snagging causes rapid stall-

ing of the rotating accessory which in turn

causes the uncontrolled power tool to be

forced in the direction opposite of the ac-

cessory’s rotation at the point of the bind-

ing.

For example, if an abrasive wheel is

snagged or pinched by the workpiece, the

edge of the wheel that is entering into the

pinch point can dig into the surface of the

material causing the wheel to climb out

or kick out. The wheel may either jump

toward or away from the operator, depend-

ing on the direction of the wheel’s move-

ment at the point of pinching. Abrasive

wheels may also break under these condi-

tions.

Kickback is the result of power tool

-

dures or conditions and can be avoided by

taking proper precautions as given below.

Maintain a rm grip on the power 1.

tool and position your body and

arm to allow you to resist kick-

back forces. Always use auxiliary

handle, if provided, for maximum

control over kickback or torque

reaction during start-up. The opera-

tor can control torque reactions or

kickback forces, if proper precautions

are taken.

Never place your hand near the 2.

rotating accessory. Accessory may

kickback over your hand.

Do not position your body in the 3.

area where power tool will move

if kickback occurs. Kickback will

propel the tool in direction opposite to

the wheel’s movement at the point of

snagging.

Use special care when working 4.

corners, sharp edges etc. Avoid

bouncing and snagging the ac-

cessory. Corners, sharp edges or

bouncing have a tendency to snag

the rotating accessory and cause loss

of control or kickback.

Do not attach a saw chain wood-5.

carving blade or toothed saw

blade. Such blades create frequent

kickback and loss of control.

SKU 66876 For technical questions, please call 1-800-444-3353. Page 9

Safety Warnings Specic for

Grinding Operations

Use only wheel types that are 1.

recommended for your power tool

and the specic guard designed

for the selected wheel. Wheels for

which the power tool was not de-

signed cannot be adequately guarded

and are unsafe.

The guard must be securely at-2.

tached to the power tool and posi-

tioned for maximum safety, so the

least amount of wheel is exposed

towards the operator. The guard

helps to protect operator from broken

wheel fragments and accidental con-

tact with wheel.

Wheels must be used only for rec-3.

ommended applications.

Always use undamaged wheel 4.

anges that are of correct size and

shape for your selected wheel.

Proper wheel anges support the

wheel thus reducing the possibility of

wheel breakage. Flanges for cut-off

wheels may be different from grinding

wheel anges.

Do not use worn down wheels 5.

from larger power tools. A wheel

intended for a larger power tool is

not suitable for the higher speed of a

smaller tool and may burst.

Vibration Safety

This tool vibrates during use. Re-

peated or long-term exposure to vibra-

tion may cause temporary or permanent

physical injury, particularly to the hands,

arms and shoulders. To reduce the risk of

vibration-related injury:

Anyone using vibrating tools regu-1.

larly or for an extended period should



then have regular medical check-

ups to ensure medical problems are

not being caused or worsened from

use. Pregnant women or people

who have impaired blood circulation

to the hand, past hand injuries, ner-

vous system disorders, diabetes, or

Raynaud’s Disease should not use

this tool. If you feel any medical or

physical symptoms related to vibra-

tion (such as tingling, numbness, and



advice as soon as possible.

Do not smoke during use. Nico-2.

tine reduces the blood supply to the



of vibration-related injury.

Wear suitable gloves to reduce the 3.

vibration effects on the user.

Use tools with the lowest vibration 4.

when there is a choice between dif-

ferent processes.

Include vibration-free periods each 5.

day of work.

Grip tool as lightly as possible (while 6.



the tool do the work.

To reduce vibration, maintain the tool 7.

as explained in this manual. If any

abnormal vibration occurs, stop use

immediately.

SAVE THESE

INSTRUCTIONS.

SKU 66876 For technical questions, please call 1-800-444-3353. Page 10

GROUNDING

TO PREVENT

ELECTRIC SHOCK

AND DEATH FROM

INCORRECT GROUNDING

WIRE CONNECTION:

Check with a qualied

electrician if you are in doubt

as to whether the outlet is

properly grounded. Do not

modify the power cord plug

provided with the tool. Never

remove the grounding prong

from the plug. Do not use the

tool if the power cord or plug

is damaged. If damaged, have

it repaired by a service facility

before use. If the plug will not

t the outlet, have a proper

outlet installed by a qualied

electrician.

Grounded Tools: Tools with Three

Prong Plugs

3-Prong Plug and Outlet

Tools marked with “Grounding Re-1.

quired” have a three wire cord and

three prong grounding plug. The

plug must be connected to a properly

grounded outlet. If the tool should

electrically malfunction or break

down, grounding provides a low

resistance path to carry electricity

away from the user, reducing the risk

of electric shock. (See 3-Prong Plug

and Outlet.)

The grounding prong in the plug is 2.

connected through the green wire in-

side the cord to the grounding system

in the tool. The green wire in the cord

must be the only wire connected to

the tool’s grounding system and must

never be attached to an electrically

“live” terminal. (See 3-Prong Plug

and Outlet.)

The tool must be plugged into an 3.

appropriate outlet, properly installed

and grounded in accordance with all

codes and ordinances. The plug and

outlet should look like those in the

preceding illustration. (See 3-Prong

Plug and Outlet.)

Double Insulated Tools: Tools

with Two Prong Plugs

Outlets for 2-Prong Plug

Tools marked “Double Insulated” do 1.

not require grounding. They have

a special double insulation system



and complies with the applicable

-

tories, Inc., the Canadian Standard

Association, and the National Electri-

cal Code. (See Outlets for 2-Prong

Plug.)

SKU 66876 For technical questions, please call 1-800-444-3353. Page 11

Double insulated tools may be used 2.

in either of the 120 volt outlets shown

in the preceding illustration. (See

Outlets for 2-Prong Plug.)

Extension Cords

Note: Extension cords must not be used

with this item’s charger.

Symbology

Double Insulated

Volts Alternating Current

Amperes





(RPM)

SKU 66876 For technical questions, please call 1-800-444-3353. Page 12

SPECIFICATIONS

Electrical Input 

Battery 18 VDC NiCd

Battery Pack

Charging Time

5-7 hours

 6500 RPM

Max. Accessory

Diameter



Arbor Diameter 

Spindle Diameter 

Accessories

Grinding Wheel, Battery

Pack, Adapter, Charger

Base, Hex Wrench,

Spanner

UNPACKING

When unpacking, make sure that the

item is intact and undamaged. If any parts

are missing or broken, please call Harbor

Freight Tools at 1-800-444-3353 as soon

as possible.

Components

Side

Handle (31)

Spanner Hex

Wrench

Battery

Pack (1)

Grinding

Wheel (18)

Adapter

Charger

Base

Angle

Grinder

Figure 1

INSTRUCTIONS FOR

PUTTING INTO USE

Read the ENTIRE IMPORTANT

SAFETY INFORMATION

section at the beginning of this

manual including all text under

subheadings therein before set

up or use of this product.

TO PREVENT

SERIOUS INJURY

FROM ACCIDENTAL

OPERATION:

Slide the ON/OFF Button (42)

of the Grinder to its “OFF”

position and remove the

Battery Pack (1) before

assembling or making any

adjustments to the tool.

Note: For additional information regarding

the parts listed in the following pages,

refer to the Assembly Diagram near

the end of this manual.

Side Handle (31)

Battery Pack (1)

Wheel Guard (16)



Gear Box (27)

Grinding

Wheel (18)





Figure 2

SKU 66876 For technical questions, please call 1-800-444-3353. Page 13

Assembly

Installing the Side Handle

TO PREVENT

SERIOUS INJURY:

Do not operate this tool with

one hand only or without the

Side Handle properly

installed.

Side Handle (31)

Gear Box (27)

Figure 3

1. The Side Handle (31) may be in-

stalled on either side of the Gear Box

(27).

Thread the Side Handle clockwise 2.

into the selected position.

Tighten securely before beginning 3.

work.

Adjusting the Wheel Guard

TO PREVENT

SERIOUS INJURY:

Do not operate this tool

without the Wheel Guard

properly installed and

positioned.

Wheel Guard (16)

Wheel Guard

Bolt (20)

Figure 4

1. The Wheel Guard comes installed on

the Grinder. To adjust the placement

of the Wheel Guard:

Using the included Hex Wrench, a.

loosen the Wheel Guard Bolt (20).

Rotate the Wheel Guard as needed b.

for the planned work.

Tighten the Wheel Guard Bolt se-c.

curely.

Check the Wheel Guard to ensure it 2.

-

essary before proceeding.

SKU 66876 For technical questions, please call 1-800-444-3353. Page 14

OPERATING INSTRUCTIONS

Read the ENTIRE IMPORTANT

SAFETY INFORMATION

section at the beginning of this

manual including all text under

subheadings therein before set

up or use of this product.

The Battery

Charge the Battery Pack (1) before 1.

each use so that you will have a fully

powered tool. To charge the Battery

Pack:

Plug the Adapter cord into the Char-a.

ger Base, then plug the Adapter into

a 120V electrical outlet.

Align the positive (+) and negative b.

(-) markings on the Battery Pack (1)

and the Charger Base, then slide the

Battery Pack into the Charger Base,

and push it until it snaps into place.



will light up.

Place the Battery Pack and Base on c.



d.

charging is complete, (approx. 5-7

hours). Unplug the Adapter and dis-

connect the Charger Base from the

Adapter and the Battery Pack.

To attach the Battery Pack to the 2.

Grinder, slide the Battery Pack into

the bottom of the Grinder until it

snaps securely into place.

To remove the Battery Pack from 3.

the Grinder, depress the two but-

tons on the sides of the Battery Pack

and slide the Battery Pack out of the

Grinder.

Tool Set Up

TO PREVENT

SERIOUS INJURY

FROM ACCIDENTAL

OPERATION:

Slide the ON/OFF Button (42)

of the Grinder to its “OFF”

position and remove the

Battery Pack (1) before

installing accessories.

Installing a Non-Threaded Accessory

The Accessory MUST be:1.

rated to more than 6,500 RPM.







dry and clean.

proven undamaged by inspec-

tion and by the ring-test explained

below.



Spindle (36)

Outer

Flange (17)

Gear Box (27)

Inner

Flange (23)

Figure 5

2. 

Button (30) to prevent the Spindle

(36) from turning.

Remove the Outer Flange (17), by 3.

unthreading it counterclockwise.

SKU 66876 For technical questions, please call 1-800-444-3353. Page 15

Keep the Inner Flange (23) in position

on the Spindle.

Note: The Inner Flange is always seated

so that the slotted side locks in place

on the Spindle, and the raised ridge

side is facing the Wheel.

Closely inspect the Grinding Wheel 4.

(18) before mounting. Perform a

ring-test on the wheel (unless wheel

is smaller than 4” or is an unusual

shape) as follows:

Tap

Wheel

Here

45° 45°

Hang

Wheel

from

Figure 6

a. 

through the arbor hole.

b.

light non-metallic object, such as a

screwdriver handle, at a point 45°

from the vertical center line on each

side of the wheel and 1 – 2 inches

from the edge of the wheel - See

Figure 6.

Rotate the wheel 45 degrees and c.

repeat the test until the entire wheel

has been checked.

An undamaged wheel will give a d.

clear tone. If cracked, there will be a

dead sound and not a clear ring.

Slip the Wheel onto the Spindle. For 5.

wheels with paper gaskets (blotters)

or metal gaskets: Slip the grind-

ing wheel onto the Spindle with the



centered on the grinding wheel and



against the Inner Flange.

WARNING: To prevent serious

injury, gaskets must be used for all

grinding wheels they are provided

with. Gaskets help prevent grind-

ing wheel damage and wheel slip-

page, causes of wheel failure.

Position the Outer Flange (17) back 6.

onto the Spindle.

Note:

put the Outer Flange on, raised



-

ner Wheels, put the Outer Flange on

so that the indented side faces the

Wheel.

Tighten with the Spanner only 7.

enough so that the wheel is securely

held on the spindle.

WARNING: To prevent serious

injury, do not overtighten ange.

Overtightening can damage the

wheel, causing wheel failure.

Installing a Threaded Accessory

TO PREVENT

INJURY:

Wear heavy-duty work gloves

when handling saw blades.

These accessories are sharp

and can cause injury.

The accessory MUST be:1.

rated to more than 6,500 RPM.



SKU 66876 For technical questions, please call 1-800-444-3353. Page 16





undamaged.

2.

Button (30) to prevent the Spindle

from turning.

Remove the Outer Flange (17) by 3.

unthreading counterclockwise, then

slide the Inner Flange (23) off the

spindle. Store in a safe place.

Thread disc accessory onto the 4.

Spindle clockwise. Wrench tighten

onto the spindle.

Work Piece and Work Area Set Up

Designate a work area that is clean 1.

and well-lit. The work area must not

allow access by children or pets to

prevent injury and distraction.

Secure loose work pieces using a 2.

vise or clamps (not included) to pre-

vent movement while working.

There must not be hazardous ob-3.

jects, such as utility lines or foreign

objects, nearby that will present a

hazard while working.

You must use personal safety equip-4.

ment including, but not limited to,

ANSI-approved eye and hearing pro-

tection, as well as heavy work gloves.

Before beginning work, provide for 5.



work surface.

General Operating Instructions

TO PREVENT

SERIOUS INJURY:

Grip the tool rmly in both

hands.

1.

the Gear Box (27) to start the tool.

Allow the tool to come up to full 2.

speed before touching the work ma-

terial.

Apply the wheel to the work mate-3.

rial, allowing the tool to operate at

full speed. If the tool bogs down, use

lighter pressure.

To create a smoother surface, keep 4.

the tool moving over the work sur-

face.

5.

from the Gear Box (27) to stop the

tool.

Allow the tool to come to a complete 6.

stop before setting it down.

To prevent accidents, turn off the tool 7.

and remove the Battery Pack (1) after

use. Clean, then store the tool in-

doors out of children’s reach.

SKU 66876 For technical questions, please call 1-800-444-3353. Page 17

MAINTENANCE AND

SERVICING

Procedures not specically

explained in this manual

must be performed only by a

qualied technician.

TO PREVENT

SERIOUS INJURY

FROM ACCIDENTAL

OPERATION:

Slide the ON/OFF Button (42)

of the Grinder to its “OFF”

position and remove the

Battery Pack (1) before

performing any inspection,

maintenance, or cleaning

procedures.

TO PREVENT SERIOUS

INJURY FROM TOOL

FAILURE:

Do not use damaged

equipment. If abnormal noise

or vibration occurs, have the

problem corrected before

further use.

Cleaning, Maintenance, and

Lubrication

BEFORE EACH USE,1. inspect the

general condition of the tool. Check

for loose screws, misalignment or

binding of moving parts, cracked or

broken parts, damaged electrical

wiring of the adapter, and any other

condition that may affect safe opera-

tion of the Grinder.

AFTER USE,2. clean external surfaces

of the Grinder with a clean, moist

cloth.

Periodically blow dust and grit out 3.

of the motor vents using dry com-

pressed air.

Ni-Cd 4. BATTERY MUST BE



. Do not short, incinerate

or open battery.

Accessory Storage and Handling

Handle accessories carefully to pre-1.

vent dropping or bumping. Do not

use wheels that have been dropped

or bumped.

Store accessories in shelves, racks, 2.

boxes, or drawers. Storage area

must be kept dry, and above freezing.

Any grinding wheels exposed to hu-

midity or freezing temperatures must

not be used.

SKU 66876 For technical questions, please call 1-800-444-3353. Page 18

Troubleshooting

Problem Possible Causes Likely Solutions

Tool will not start. Battery Pack (1) not charged.1.

Internal damage or wear. 2.

(Carbon brushes or switch, for

example.)

Charge Battery Pack (1).1.

Have technician service tool.2.

Tool operates slowly. Excess pressure applied to 1.

workpiece.

Discharged battery.2.

Decrease pressure, allow tool to do the 1.

work.

Recharge Battery.2.

Performance

decreases over time.

Carbon brushes worn or damaged. 

Excessive noise or

rattling.

Internal damage or wear. (Carbon

brushes or bearings, for example.)

Have technician service tool.

Overheating. Forcing tool to work too fast.1.

Blocked motor housing vents. 2.

Allow tool to work at its own rate.1.

Blow dust out of motor using compressed 2.

air.

Tool does not grind

effectively.

Disc accessory may be loose on 1.

Spindle. Check tightness of Outer

Flange (17) or threaded disc

accessory on Spindle.

Disc accessory may be damaged, 2.

worn or wrong type for the

material.

Be sure disc accessory is of correct 1.

dimension and Outer Flange (17) is tight.

Check condition and type of disc 2.

accessory. Use only proper type of disc

accessory in good condition.

Follow all safety precautions whenever diagnosing or servicing the

tool. Disconnect power supply before service.

SKU 66876 For technical questions, please call 1-800-444-3353. Page 19

Part Description Qty

1 Battery Pack, 18V 1

2 Screw M3.5x14 4

3 Right Housing 1

4 Pin, M3x9.5 4

5 Screw M3.5x22 2

6 Transmission Flange 1

7 Screw M3x10 2

8 Gear Shaft 1

9 Key 1

12 Pinion Gear 1

13 Screw M4x14 4

14 Washer 4

15 Spring Washer 4

16 Wheel Guard 1

17 Outer Flange 1

18 Grinding Wheel 1

19 Square Nut M5 1

20 Wheel Guard Bolt M5x20 1

21 Washer 1

22 Spring Washer 1

23 Inner Flange 1

24 Gear Housing 1

25 Screw M4x10 3

26 Screw M4x20 4

27 Gear Box 1

28 Ring 1

29  1

Part Description Qty

30  1

31 Side Handle 1

32 Needle Bearing HK0608 1

33 Ball Bearing 609zz 1

34 Bearing Fixing Plate 1

35 Screw M4x8 2

36 Spindle 1

37 Ball Bearing 6000zz 1

38  1

39 Slide Bearing M10x7x8 1

40 Snap Ring 1

41  1

42  1

43 Bearing Support 1

44 Key 1

45 Spring 1

46  1

47 Pull Rod 1

48 Switch 1

49  1

50 Battery Terminal 1

51 Fan 1

52 O-Ring 2

53  1

54 Fan Flange 1

55 Motor 1

56  1

PLEASE READ THE FOLLOWING CAREFULLY





DISTRIBUTOR MAKES ANY REPRESENTATION OR WARRANTY OF ANY KIND TO THE BUYER THAT















PARTS LIST

SKU 66876 For technical questions, please call 1-800-444-3353. Page 20

ASSEMBLY DIAGRAM

Record Product’s Serial Number Here:

Note: If product has no serial number, record month and year of purchase instead.

Note: Some parts are listed and shown for illustration purposes only, and are not avail-

able individually as replacement parts.

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Chicago Electric 66876 Set Up And Operating Instructions Manual

Brand: Chicago Electric

Model: 66876

Category: Power tools

Type: Set Up And Operating Instructions Manual

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Chicago Electric 66876 Set Up And Operating Instructions Manual

Chicago Electric 66876 Set Up And Operating Instructions Manual

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