Chicago Electric 66660 Set Up And Operating Instructions Manual

Brand: Chicago Electric

Model: 66660

Category: Power tools

Type: Set Up And Operating Instructions Manual

Chicago Electric 66660

The Chicago Electric 66660 is a 7-1/4" Worm Gear Circular Saw designed for a variety of cutting applications. Its powerful motor and durable construction make it ideal for both professional and DIY projects.

Capabilities:

Accurate Cuts: The saw features a precision-ground blade that ensures clean, accurate cuts in a variety of materials, including wood, metal, and plastic.
Versatile Cutting Angles: The adjustable base allows for bevel cuts up to 45 degrees, providing versatility for angled cuts and miters.
Depth Control: The adjustable cutting depth allows for precise control of the depth of cut, ensuring consistent results.

Chicago Electric 66660

Capabilities:

Accurate Cuts: The saw features a precision-ground blade that ensures clean, accurate cuts in a variety of materials, including wood, metal, and plastic.
Versatile Cutting Angles: The adjustable base allows for bevel cuts up to 45 degrees, providing versatility for angled cuts and miters.
Depth Control: The adjustable cutting depth allows for precise control of the depth of cut, ensuring consistent results.

7-¼” WORM GEAR CIRCULAR SAW

66660

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. Tools required for

assembly and service may not be included.

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

SKU 66660 For technical questions, please call 1-800-444-3353. Page 2

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

warranty (or month and year of purchase if

product has no number). Keep this man-

ual 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.

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.

Unmodied plugs and matching out-

lets will reduce risk of electric shock.

SKU 66660 For technical questions, please call 1-800-444-3353. Page 3

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. Keep

cord away from heat, oil, sharp

edges or moving parts. Damaged

or entangled cords increase the risk

of electric shock.

If you are using an extension cord 1.

outdoors, make sure it is marked

with the sufx “W-A” (“W” in Can-

ada) to indicate it is acceptable for

outdoor use. Use of a cord suitable

for outdoor use reduces the risk of

electric shock.

If operating a power tool in a damp a.

location is unavoidable, use a

Ground Fault Circuit Interrupter

(GFCI) protected supply. Use of

a GFCI reduces 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 personal protective equip-b.

ment. Always wear eye protection.

Safety equipment such as dust mask,

non-skid safety shoes, hard hat, or

hearing protection used for appropri-

ate conditions 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.

Only use safety equipment that g.

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

SKU 66660 For technical questions, please call 1-800-444-3353. Page 4

do the job better and safer at the rate

for which it was designed.

Use clamps or other practical ways b.

to secure and support the work

piece on a stable platform. Holding

the work piece by hand or against

your body is unstable and may lead

to loss of control or injury.

Do not use the power tool if the c.

switch does not turn it on and off.

Any power tool that cannot be con-

trolled with the switch is dangerous

and must be repaired.

Disconnect the plug from the d.

power source before making any

adjustments, changing accesso-

ries, or storing power tools. Such

preventive safety measures reduce

the risk of starting the power tool ac-

cidentally.

Store idle power tools out of the e.

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 f.

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.

Keep cutting tools sharp and g.

clean. Properly maintained cutting

tools with sharp cutting edges are

less likely to bind and are easier to

control.

Use only saw blades and acces-h.

sories that have been approved

for use with this tool. Accessories

that may be suitable for one tool may

be hazardous when used on another

tool.

Use the power tool, accessories i.

and saw blades 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 differ-

ent from those intended could result

in a hazardous situation.

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.

Worm Gear Circular Saw

Safety Warnings

This saw is intended to function as 1.

a Circular Saw only. Read all safety

warnings, instructions, illustra-

tions and specications provided

with this saw. Failure to follow all

instructions listed below may result

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

injury.

Keep hands away from the cutting 2.

area and blade. Keep your second

hand on auxiliary handle or motor

housing. Do not reach underneath

the work piece. The saw blade is ex-

posed on the underside of the work.

Do not attempt to move work pieces

while the blade is turning. CAUTION:

The blade takes time to stop spinning

after you release the Trigger. Wait for

the blade to stop turning before mov-

ing the saw or removing the cut off

material.

SKU 66660 For technical questions, please call 1-800-444-3353. Page 5

Check the Lower Blade Guard (37) 3.

for proper closing before each use.

Do not operate saw if guard does not

close properly or has been disabled.

NOTE: If saw is dropped, the guard

may be damaged or bent. Check op-

eration of guard by moving the Lower

Blade Guard Lever (38). Be sure that

Guard opens and closes freely with-

out contacting blade. If blade Guard

is damaged, unplug the tool and

repair the Guard before further use.

Lower Blade Guard (37) should be 4.

retracted manually only when mak-

ing special cuts where the guard

interferes. The guard must be low-

ered to cover the blade as soon as it

clears the material.

Always check to be sure the Lower 5.

Blade Guard (37) is covering the

Saw Blade (43) before setting the

tool down.

Never hold the work piece by hand 6.

or against your body during work.

Unsupported work can slip caus-

ing injury.

When making a rip cut, always use 7.

a rip fence or straight edge guide.

This will improve the accuracy of the

cut and help prevent kickback.

Do not use saw blades which are 8.

not specically designed and

recommended by the tool manu-

facturer. Just because the blade can

be attached to your saw, does not

assure safe operation.

The outside diameter and the 9.

thickness of your blade must be

within the capacity rating of your

saw. Incorrectly sized accessories

cannot be adequately guarded or

controlled.

The arbor size of the blade must 10.

properly t the spindle of the saw.

Accessories with arbor holes that do

not match the mounting hardware

of the saw will run out of balance,

vibrate excessively and may cause

loss of control.

Do not use a damaged blade. 11. Be-

fore each use inspect the blade for

chips, cracks, tooth damage or warp-

ing. If the saw or blade is dropped,

inspect for damage before use. After

inspecting and installing a blade, po-

sition yourself and bystanders away

from the plane of the rotating blade

and run the saw at maximum no-

load speed for one minute. Watch for

vibration or abnormal noise or opera-

tion.

Never use damaged or incorrect 12.

Arbor Bolt (46) or Washers (44-

45). Be sure the Blade is properly

installed with the correct Arbor Bolt

and Washers before use. Be sure the

Arbor Bolt is tight before use.

Wear personal protective equip-13.

ment. Depending on application, use

face shield, safety goggles or safety

glasses. As appropriate, wear dust

mask, hearing protectors, gloves and

workshop apron capable of stop-

ping small abrasive or work piece

fragments. The eye protection must



generated by various operations.

The dust mask or respirator must be

-

ated by your operation. Prolonged

exposure to high intensity noise may

cause hearing loss.

SKU 66660 For technical questions, please call 1-800-444-3353. Page 6

Keep bystanders a safe distance 14.

away from work area. Anyone enter-

ing the work area must wear personal

protective equipment.

Hold saw by insulated gripping 15.

surfaces only, when performing an

operation where the cutting blade

may contact hidden wiring or its

own cord. Cutting blade contacting a





operator.

Position the cord clear of the spin-16.

ning blade. If you lose control, the

cord may be cut or snagged and your

hand or arm may be pulled into the

spinning blade.

Never lay the saw down until the 17.

blade has come to a complete

stop. The spinning blade may grab

the surface and pull the saw out of

your control.

Do not operate the saw while car-18.

rying it at your side. Accidental

contact with the spinning blade could

snag your clothing, pulling the blade

into your body.

Maintain labels and nameplates 19.

on the tool. These carry important

safety information. If unreadable or

missing, contact Harbor Freight Tools

for a replacement.

Avoid unintentional starting.20. Pre-

pare to begin work before turning on

the tool.

When using a handheld saw, 21.

maintain a rm grip on the tool

with both hands to resist starting

torque.

When cutting, rest the larger por-22.

tion of the Base Plate (103) on

the supported portion of the work

piece, not the cut off.

NEVER hold the work piece or 23.

waste piece with your hand during

operation. Always hold the work

piece with clamps or another suit-

able method.

Never mount this tool upside down 24.

in a clamp or vise. The blade is un-

covered in this position, and the work

piece can easily twist or bind causing

kick back.

Do not leave the tool unattended 25.

when it is plugged into an electri-

cal outlet. Turn off the tool, and un-

plug it from its electrical outlet before

leaving.

This product is not a toy. Keep it 26.

out of reach of children.

People with pacemakers should 27.

consult their physician(s) before

use. 

proximity to heart pacemaker could

cause pacemaker interference or

pacemaker failure. In addition, peo-

ple 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.

Some dust created by power sand-28.

ing, sawing, grinding, drilling,

and other construction activities,

SKU 66660 For technical questions, please call 1-800-444-3353. Page 7

contains chemicals known [to the

State of California] to cause can-

cer, birth defects or other repro-

ductive 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

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 29.

this product will expose you to

lead, a chemical known to the

State of California to cause cancer,

and birth defects or other repro-

ductive harm. Wash hands after

handling. (California Health & Safety

Code § 25249.5, et seq.)

The warnings, precautions, and 30.

instructions discussed in this in-

struction manual cannot cover all

possible conditions and situations

that may occur. It must be under-

stood by the operator that common

sense and caution are factors which

cannot be built into this product, but

must be supplied by the operator.

Preventing Kick Back

Kick back is an extremely

dangerous action which can

cause serious injury.

Kick back occurs when the Blade 1.

binds in the work material during

operation. The Blade stops instantly,

causing the tool to recoil back toward

the operator. The work material may

also recoil at an unpredictable angle.

Kick back can cause serious personal

injury or damage to property.

Never place your hand or ngers 2.

behind the saw during use. If the

saw kicks back, your hands can be

seriously injured. During use, always



on the two handles.

It is important to be aware of the 3.

possibility of kick back at all times

when using the tool. Use safe prac-

tices at all times to prevent kick back,

and to protect yourself and others

from injury, should it occur.

Kick back can be caused by the 4.

blade being misaligned with the

work material. Prevent misalignment

by always clamping the work mate-

rial to a stable work surface. Always

make a cut in a straight line, never

try to cut a curve with this tool. When

making cuts over 1 foot long, always

use a rip fence or straight edge to

ensure a straight cut.

Kick back can be caused by at-5.

tempting to cut too much material

at once. Do not force the tool, allow it

to work at a slow and steady pace. If

you are forcing the tool, you will hear

SKU 66660 For technical questions, please call 1-800-444-3353. Page 8

the motor slow down, and you will

feel resistance from the work mate-

rial.

Kick back can occur when making 6.

a plunge cut. When making a plunge

cut, be extremely cautious to enter

the work piece gradually, keeping the

blade aligned with the line of the cut.

Kick back can be caused by hav-7.

ing a loose hold on the tool during

operation.

with both hands during operation.

Kick back can occur when cutting 8.

long pieces or large panels. As

the cut progresses, the cut-off side

can sag, causing it to bind the blade.

When making long cuts, always

support the cut-off piece to prevent

it binding the blade. Using a clamp

on the beginning of the kerf will help

prevent the cut off from sagging.

Kick back can occur as internal 9.

stresses in a board are released

during the cut. Green, wet, warped

or improperly cured boards may twist

and warp as they are cut. This warp-

ing can easily bind the blade causing

kick back. Watch the cut-off piece as

you work. If necessary, clamp the cut-

off piece or put a wedge in the kerf to

prevent binding.

Kick back can be caused by using 10.

a dull, dirty or damaged blade. Al-

ways inspect your blade before use.

Replace any blade that is dull, dirty

or damaged. Good quality dull blades

can be sharpened. Dirty blades can

be cleaned with a blade cleaner to re-

move glue or pitch. Damaged blades

should be discarded.

Kick back can be caused by using 11.

the wrong blade type for the work

material. Always read the recom-

mendation of the blade manufacturer

for the type of material and cut be-

ing made. Special blades are made

for cross cutting, rip cutting, hard

wood, plywood, soft wood, tile, ce-

ment board, demolition, various panel



use the wrong blade type for the job

you are doing.

Kick back can occur at the end of a 12.

cut. Before completing the cut, sup-

port the waste piece to prevent it from

falling or binding the blade as it is cut

off. At the end of a cut release the

Trigger (79) and allow the blade to

stop turning before removing the saw

from the cut.

Kick back can occur if the Base 13.

Plate (103) is not properly adjusted

or comes loose during the cut. Use

the Base Plate to set the depth and

bevel angle of the cut. After adjusting

the Base Plate, secure the Cam Le-

vers (88) to prevent it from loosening.

Kick back can occur if you hit 14.

hidden obstacles. When making a

plunge cut, into a wall for example,

check to be sure you will not hit

wires, pipes, conduit nails or other

obstructions. Do not cut through nails

or screws, these can damage the

blade and may cause kick back.

If kick back occurs, immediately 15.

release the Trigger (79) and main-

tain a rm grip on the tool as the

blade stops turning. Do not restart

the tool if the blade is binding.

Unplug the tool to prevent acciden-16.

tal starting. Use a clamp or wedge to

SKU 66660 For technical questions, please call 1-800-444-3353. Page 9

open the kerf to release the saw, and

set it aside. Resolve the problem that

caused the kick back before resum-

ing work.

When restarting a cut, put the 17.

base plate (103) at on the work

material, with the Saw Blade (43)

in the kerf. Pull the Blade back from

the end of the cut, leaving a space

ahead of the blade. Be sure the blade

is not binding, and can turn freely in

the kerf. Firmly grip the tool with both

hands and squeeze the Trigger (79)

to restart the tool. Continue with the

cut.

Vibration Safety

This tool vibrates during use. Re-

peated or long-term exposure to

vibration 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.

still keeping safe control of it). Let

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 66660 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

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

Tools marked “Double Insulated” do 1.

not require grounding. They have

a special double insulation system



and complies with the applicable

standards of Underwriters Labora-

tories, Inc., the Canadian Standard

Association, and the National Electri-

cal Code. (See Outlets for 2-Prong

Plug.)

SKU 66660 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

Grounded1. tools require a three wire

extension cord. Double Insulated

tools can use either a two or three

wire extension cord.

As the distance from the supply outlet 2.

increases, you must use a heavier

gauge extension cord. Using exten-

sion cords with inadequately sized

wire causes a serious drop in voltage,

resulting in loss of power and pos-

sible tool damage.

(See Table A.)

The smaller the gauge number of the 3.

wire, the greater the capacity of the

cord. For example, a 14 gauge cord

can carry a higher current than a 16

gauge cord. (See Table A.)

When using more than one exten-4.

sion cord to make up the total length,

make sure each cord contains at

least the minimum wire size required.

(See Table A.)

If you are using one extension cord 5.

for more than one tool, add the

nameplate amperes and use the sum

to determine the required minimum

cord size. (See Table A.)

If you are using an extension cord 6.

outdoors, make sure it is marked with



indicate it is acceptable for outdoor

use.

Make sure the extension cord is prop-7.

erly wired and in good electrical con-

dition. Always replace a damaged

extension cord or have it repaired by



Protect the extension cords from 8.

sharp objects, excessive heat, and

damp or wet areas.

RECOMMENDED MINIMUM WIRE

GAUGE FOR EXTENSION CORDS*

(120/240 VOLT)

NAMEPLATE

AMPERES

(at full load)

EXTENSION CORD

LENGTH

25’

50’

75’

100’

150’

0 – 2.0 18 18 18 18 16

2.1 – 3.4 18 18 18 16 14

3.5 – 5.0 18 18 16 14 12

5.1 – 7.0 18 16 14 12 12

7.1 – 12.0 16 14 12 10 -

12.1 – 16.0 14 12 10 - -

16.1 – 20.0 12 10 - - -

TABLE A

* Based on limiting the line

voltage drop to ve volts at

150% of the rated amperes.

Symbology

Double Insulated

Canadian Standards Association

Underwriters Laboratories, Inc.

Volts Alternating Current

Amperes



No Load Revolutions per Minute

(RPM)

SKU 66660 For technical questions, please call 1-800-444-3353. Page 12

SPECIFICATIONS

Electrical Requirements 

Power Cord Type

Double Insulated

Polarized

Motor No Load Speed 4500 RPM

Blade Diameter 7-¼” Diameter

Arbor Size and Type



Left Hand Thread

13mm Bolt Head

Maximum Cutting Depth





Lubricating Oil

Mobil SHC 636

(15ml) 0.51 Oz.

UNPACKING

When unpacking, check to make sure

that the item is intact and undamaged. If

any parts are missing or broken, please

call Harbor Freight Tools at the number

shown on the cover of this manual as soon

as possible.

List of contents

Description Q’ty

Worm Drive Saw 1

Carbide Tipped Blade 1

13mm Arbor Wrench 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:

Turn the Power Switch of the

tool to its “OFF” position and

unplug the tool from its

electrical outlet 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.

Assembly

Before use, you must install the Saw 1.

Blade (43).

Be sure the tool is unplugged.2.

Press in and hold the Spindle Lock 3.

Pin (14).

Using the a 6mm Hex Key, remove 4.

the Arbor Bolt (46) and Arbor Wash-

ers (44 and 45). NOTE: The Arbor

Bolt (46) has left hand threads.

Place the Saw Blade (43) on the 5.

Arbor (25). Be sure to match the rota-

tion direction marked on the Blade

with the arrow embossed on the

Lower Blade Guard (37).

Replace the Arbor Washers (44 and 6.

45) as shown in the Assembly Dia-

gram.

Replace the Arbor Bolt (46). Tighten 7.

securely.

Before operation make sure that the 8.

Spindle Lock (14) is released. Turn

the blade by hand to check the Spin-

SKU 66660 For technical questions, please call 1-800-444-3353. Page 13

IMPORTANT COMPONENTS OF THIS TOOL

Cam Lever (88b)

Fixed Blade

Guard (31)

Forward

Handle (48)

Rotation Marking

on Blade

Trigger (79)

Handle (77, 81)

Carbon Brush

Cover (72)

Cam Lever (88a)

Lower Blade

Guard (37)

Rotation

Direction

Marking

Arbor Bolt

and Wash-

ers (44-46)

Base Plate

(103)

Depth Gauge

Scissor Hinge

(105)

Lower Blade

Guard Lever (38)

Oil Fill Plug (50)

Suspension

Hook (56)

Handle (77, 81)

Trigger (79)

Base Plate

(103)

Lower Blade

Guard (37)

Forward

Handle (48)

Carbon Brush

Cover (72)

Bevel Angle

Gauge (101)

Spindle Lock

Pin (14)

SKU 66660 For technical questions, please call 1-800-444-3353. Page 14

dle Lock. If it has not released, the

saw must be serviced before use.

Mounting

This tool is designed to be used by

hand only. Do not mount or clamp the tool.

Functions

Please refer to the pictures on the 1.

previous page when setting up and

adjusting this tool.

Grip the Handle (77,81) and Forward 2.

Handle (48) to control the tool during

operation.

Squeeze the Trigger (79) to turn the 3.

tool ON, release the Trigger to turn

the tool OFF.

The Fixed Blade Guard (31) and 4.

Lower Blade Guard (37) help protect

you from contacting the Saw Blade

(43) during operation. The Lower

Blade Guard retracts as the cut is

made. The Lower Blade Guard can

also be manually retracted, using the

Lower Blade Guard Lever (38).

The Base Plate (103) supports the 5.

tool on the work piece during opera-

tion. The Base Plate can be adjusted

to control depth and bevel angle of

the cut.

The Suspension Hook (56) can be used 6.

to temporarily hang the tool on framing

material for convenient storage.

The Carbon Brushes (70) occasion-7.

ally require maintenance, and can be

accessed through the Carbon Brush

Covers (72).

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.

Tool Set Up

TO PREVENT

SERIOUS INJURY

FROM ACCIDENTAL

OPERATION:

Turn the Power Switch of the

tool to its “OFF” position and

unplug the tool from its

electrical outlet before

performing any inspection,

maintenance, or cleaning

procedures.

The Base Plate (103) can be ad-1.

justed to control the depth and bevel

angle of the cut.

To adjust the depth of the cut, loosen 2.

the Rear Cam Lever (88A). Place

the Base Plate (103) on a table or

-

ing against the table. While holding

the Base Plate with one hand, lift up

the end of the Worm Gear Saw (from

cord end). Align the markings along

the outer face of the Depth Guide

Scissors Hinge (105) with the index

mark on the left hand side Carbon

Brush Cover (72), noting that this

scaling is for reference only.

To adjust the bevel angle of the cut, 3.

up to 45 degrees, loosen the Forward

Cam Lever (88B), hold the Base

Plate (103) and swing the saw side

ways (to the left) until the desired

angle is achieved. For convenience,

SKU 66660 For technical questions, please call 1-800-444-3353. Page 15

scale graduations are stamped on the

face of Bevel Angle Bracket (101). An

indexing pointer is stamped on the

adjacent tab. For greater accuracy,





angle. To adjust the bevel angle

passed 45 degrees and up to 51.5

degrees, pushing in the Bevel Angle

Release Push button (90) will allow

the Bevel Angle Bracket to be further

tilted. Rotate the Cam Lever (88B)

clockwise to lock-in the setting.

Prior to the initial use, make a 90º de-4.

gree cut on a solid piece of wood (do

not use particle board or plywood).

With a protractor verify whether the



“Zero” degree setting of the Bevel

Angle Bracket (101), use the Set

Screw (94).

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.

Route the power cord along a safe 2.

route to reach the work area without

creating a tripping hazard or exposing

the power cord to possible damage.

The power cord must reach the work

area with enough extra length to al-

low free movement while working.

Secure loose work pieces using a 3.

vise or clamps (not included) to pre-

vent movement while working.

There must not be hazardous ob-4.

jects, such as utility lines or foreign

objects, nearby that will present a

hazard while working.

Be sure to select and install an ap-5.

propriate saw blade in good condition

before starting work.

General Operating Instructions

Clean the work surface and under-1.

side of the Base Plate (103).

Check lubricating oil level before 2.

initial use and after every 25 hours

of operation. Locate the Base Plate

(103) at the corner of work bench

with the rear end accessible and

the Lower Guard resting against the

bench. Use a “C” Clamp to secure

the end of the Base Plate to the

bench.

With a 6mm hex key remove the Oil 3.

Fill Plug (50).

Oil level should just reach bottom of 4.

the threads in the Worm Gear Hous-

ing (18).

5.



of this manual.

Prior to reattaching the Oil Fill Plug, 6.

inspect the condition of the O-ring

gasket. Replace if torn, damaged or

elongated.

Replace the plug and tighten snug. 7.

Do not over tighten.

To operate tool, place it at the end 8.

of the work piece, with the blade not

touching the work piece.

Squeeze the Trigger (79) to start the 9.

tool operating.

Guide the saw along the line to be cut.10.

When the cut is complete, release the 11.

Trigger to allow the Blade to come to

a complete stop.

SKU 66660 For technical questions, please call 1-800-444-3353. Page 16

For convenient sighting along the cut 12.

line, there are notches in the leading

edge of the Base Plate (103). Align the

left hand notch with your pencil line for



notch with the pencil mark for making



are approximate only. For accurate

cuts, always use a straight edge guide

clamped to the work piece.

If desired, you can use the Cutting 13.

Guide (108, 109).

Slide the Cutting Guide (108) through 14.

the Base Plate (103) and secure in

position using the Thumb Screw (93).

Align the Cutting Guide Fence (109) 15.

with the edge of the work piece, and

use it to guide the saw during the cut.

This tool will help you make straight

cuts, and can also be used to cut

several pieces of the same width.

CAUTION: Do not hold the Cutting

Guide with one hand and the saw

with the other. Always use two hands

when operating this saw.

To prevent accidents, turn off the tool 16.

and disconnect its power supply after

use. Clean the work surface and

underside of base plate (103), then

store the tool indoors out of children’s

reach.

SKU 66660 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:

Turn the Power Switch of the

tool to its “OFF” position and

unplug the tool from its

electrical outlet 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 wir-

ing, and any other condition that may

affect its safe operation.

Periodically clean out accumulated 2.

saw dust from the tool to prevent any

part jamming or overheating.

Keep the Lower Blade Guard Spring 3.

(36) clean and lubricated. Check the

operation of the Lower Blade Guard

and adjust or repair if needed.

AFTER USE,4. clean external surfaces

of the tool with clean cloth.

CARBON BRUSH MAINTENANCE.5.

The carbon brushes may require

maintenance when the motor perfor-

mance of the tool decreases or stops

working completely. To maintain the

brushes:

Remove the Carbon Brush Cover a.

(72, 110) on each side of the motor

housing.

Remove the carbon brushes from b.

the housing. Keep track of which

orientation the old carbon brush-

es were in to prevent needless

wear if they will be reinstalled.

If either carbon brush is worn down c.



To clean old carbon brushes before d.

reusing them, rub the contact areas

with a pencil eraser.

Reinsert the old carbon brushes in e.

the same orientation to reduce wear.

When installing, make sure the car-f.

bon portions of the brushes contact

the motor armature, and that the

springs face away from the motor.

Also, make sure the springs operate

freely.

Replace the Carbon Brush Covers. g.

Do not overtighten.

Note: New carbon brushes tend to spark



conform to the motor’s armature

WARNING! If the supply cord of

this power tool is damaged, it must

be replaced only by a qualied

service technician.

SKU 66660 For technical questions, please call 1-800-444-3353. Page 18

Troubleshooting

Problem Possible Causes Likely Solutions

Tool will not start No power at outlet.1.

Cord not connected.2.

Cord Damaged3.

Carbon Brushes worn or 4.

damaged

Check power at outlet.1.

Check that cord is plugged in.2.

Check condition of cord3.

Check condition of Carbon Brushes, replace 4.

if necessary.

Tool operates

slowly or

intermittently

Worn or damaged Carbon 1.

Brushes

Damaged Power Cord2.

Check condition of Carbon Brushes, replace 1.

if necessary.

Check condition of cord and repair if 2.

necessary.

Saw Blade will not

turn

Spindle Lock (14) may be 1.

engaged.

Press it to release. If it won’t release, repair 1.

tool before use.

Saw does not cut

effectively

Arbor Bolt is loose or Arbor 1.

Washers are not seated.

Blade is dull or incorrect for 2.

application.

Blade direction is wrong.3.

Seat Arbor Washers and tighten Arbor Bolt1.

Check condition of Blade and replace if 2.

necessary.

Match rotary direction markings on blade 3.

with arrow on Lower Blade Guard (37).

Follow all safety precautions whenever diagnosing or servicing the

tool. Disconnect power supply before service.

SKU 66660 For technical questions, please call 1-800-444-3353. Page 19

PARTS LIST

Part Description Qty.

1 Screws mm 3 x 9 6

2 Spring Washers m3 6

3 Cover Gasket 1

4 Cover Rubber Ring for Expansion 1

5 Front Bearing Large Circlip m40 1

6 Front Worm Gear Bearing 6203 1

7 Front Bearing Small Circlip m17 1

8 Worm Gear 1

9 Guide Pins m 3 x 8 2

10 Cap Screw m 3 x 6 2

11 Spindle Lock Button 1

12 Spindle Lock Nut 1

13 Spindle Lock Washer 1

14 Spindle Lock Pin 1

15 Spindle Lock Spring 1

16 Spindle Lock Spring Retainer 1

17 Spindle Lock Rubber Seal 1

18 Worm Gear Housing 1

19 Arbor Bearing Retainer 1

20 Inner Arbor Bearing 6201 1

21 Arbor Lock Block 1

22 Arbor Lock Key m 3 x 10 1

23 Arbor Gear 1

24 Arbor Gear Key m 5 x16 1

25 Arbor 1

26 Arbor Gear Seal 1

27 Outer Arbor Bearing Seal 1

28 Outer Arbor Bearing 6303-2Z 1

29 Arbor Assembly Cover 1

30 Arbor Cover Screws m5 x 14 7

31 Fixed Blade Guard 1

32 Fixed Blade Guard Bumper 1

33 Blade Guard Bumper Suopprt 1

34 Fixed Blade Guard Ferrule 1

35 Fixed Blade Guard Bolt m8 x 40 1

36 Lower Blade Guard Spring 1

37 Lower Blade Guard 1

38 Lower Blade Guard Lever 1

39 Rivets m4 4

PARTS LIST

Part Description Qty.

40 Lower Blade Guard Bearing 1

41 Lower Blade Guard Retainer 1

42 Saw Blade Arbor Adapter 1

43 Saw Blade 1

44 Saw Blade Arbor Washer 1

45 Arbor Lock Washer 1

46 Arbor Bolt 1

47 Forward Handle Mounting Plate 1

48 Forward Handle 1

49 O-Ring 1

50 Oil Fill Plug 1

51 Pan Head Screws m5 x 10 5

52 Suspension Hook Bracket 1

53 Suspension Hook Spring 1

54 Suspension Hook Bushing 1

55 Suspension Hook Pin m3 x 16 1

56 Suspension Hook 1

57 Front Rotor Seal 1

58 Front Rotor Bearing 6201-2Z 1

59 Front Rotor Circlip m32 1

60 Armature Assembly 1

61 Armature Bearing 608-2Z 1

62 Armature Bearing Washer 1

63 Armature Bolts ST5 x 53 2

64 Stator 1

65 Stator Housing Screws m4 x 14 4

66 Stator Housing 1

67 Spring m6 x 8 2

68 Motor Housing 1

69 Carbon Brush Holder 2

70 Carbon Brush 2

71 Carbon Brush Sleeve 2

72 Carbon Brush Cover LHS 1

73 Brush Cover Screws m3 x 5 4

74 Lock Washers m5 4

75 Motor Housing Bolts m5 x 90 4

76 Handle Assembly Screws m5 x 15 4

77 Handle Left Side 1

78 Handle Assembly Screws m5 x 12 2

SKU 66660 For technical questions, please call 1-800-444-3353. Page 20

PARTS LIST

Part Description Qty.

79 Trigger Type Power Switch 1

80 Self Tapping Screws m 4 x 16 6

81 Handle Right Side 1

82 Guide Pin 1

83 Power Cord Lock 1

84 Power Cord 1

85 Power Cord Strain Relief 1

86 Cap Nut 2

87 Circlip m10 2

88a Cam Lever for Depth Adjustment 1

88b Cam Lever for Bevel Angle

Adjustment

89 Flat Washer 3

90 Bevel Angle Release Pushbutton

Cover

91 Bevel Angle Release Pushbutton

Spring

92 Bevel Angle Release Pushbutton

PARTS LIST

Part Description Qty.

93 Cutting Guide Thumb Screw 1

94 Set Screw m5 x 10 1

95 Depth Adjust Bracket 1

96 Cap Nut m6 1

97 Carriage Bolt 1

98 Bevel Angle Guide Pin 1

99 Depth Guide Mounting Bracket 1

100 Rivet m8 3

101 Bevel Angle Bracket (Gauge) 1

102 Depth Guide Axle 1

103 Base Plate 1

104 Flat Head Screws m5 x 9 4

105 Depth Guide Scissor Hinge 1

106 Depth Guide Hinge Bracket 1

107 Depth Hinge Guide Pin 1

108 Cutting Guide 1

109 Cutting Guide Fence 1

110 Carbon Brush Cover RHS 1

PLEASE READ THE FOLLOWING CAREFULLY

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

DIAGRAM IN THIS MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER OR

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

HE OR SHE IS QUALIFIED TO MAKE ANY REPAIRS TO THE PRODUCT, OR THAT HE OR SHE IS

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

DISTRIBUTOR EXPRESSLY STATES THAT ALL REPAIRS AND PARTS REPLACEMENTS SHOULD

BE UNDERTAKEN BY CERTIFIED AND LICENSED TECHNICIANS, AND NOT BY THE BUYER. THE

BUYER ASSUMES ALL RISK AND LIABILITY ARISING OUT OF HIS OR HER REPAIRS TO THE

ORIGINAL PRODUCT OR REPLACEMENT PARTS THERETO, OR ARISING OUT OF HIS OR HER

INSTALLATION OF REPLACEMENT PARTS THERETO.

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Chicago Electric 66660 Set Up And Operating Instructions Manual

Brand: Chicago Electric

Model: 66660

Category: Power tools

Type: Set Up And Operating Instructions Manual

Chicago Electric 66660

Capabilities:

Accurate Cuts: The saw features a precision-ground blade that ensures clean, accurate cuts in a variety of materials, including wood, metal, and plastic.
Versatile Cutting Angles: The adjustable base allows for bevel cuts up to 45 degrees, providing versatility for angled cuts and miters.
Depth Control: The adjustable cutting depth allows for precise control of the depth of cut, ensuring consistent results.

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Chicago Electric 66660 Set Up And Operating Instructions Manual

Chicago Electric 66660 Set Up And Operating Instructions Manual

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