Chicago Electric 91757 User manual

7-1/4” CIRCULAR SAW

WITH LASER GUIDE

Model 91757

ASSEMBLY AND OPERATING INSTRUCTIONS

3491 Mission Oaks Blvd., Camarillo, CA 93011

Visit our Web site at: http://www.harborfreight.com

TO PREVENT SERIOUS INJURY,

READ AND UNDERSTAND ALL WARNINGS

AND INSTRUCTIONS BEFORE USE.

manual or any artwork contained herein may be reproduced in any shape or form

without the express written consent of Harbor Freight Tools.

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

PRODUCT SPECIFICATIONS

SAVE THIS MANUAL

You will need this manual for the safety warnings and precautions, assembly, operating,

inspection, maintenance and cleaning procedures, parts list and assembly diagram.

Keep your invoice with this manual. Write the invoice number on the inside of the front

cover. Keep this manual and invoice in a safe and dry place for future reference.

GENERAL SAFETY RULES

WARNING!

READ AND UNDERSTAND ALL INSTRUCTIONS

Failure to follow all instructions listed in the following

pages may result in electric shock, fire, and/or serious injury.

SAVE THESE INSTRUCTIONS

SKU 91757 For technical questions please call 1-800-444-3353 PAGE 2

UNPACKING

When unpacking, check to make sure all the parts shown on the Parts List on page 17

are included. 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.

Item Description

Electrical Requirements 120 V / 60 Hz / 13 AMP (Peak)

5,200 RPM (No Load)

Two Prong Polarized Plug

Arbor Size 5/8” Diameter

Saw Blade (Included) 7-1/4”, 24 Tooth, Carbon Tipped Tooth Design

Maximum Cutting Depth 2-7/16” @ 90° / 1-13/16” @ 45°

Additional Features Laser Guide

Soft Handle Grip / Dust Chute / Depth Of Cut

Scale

Adjustable Base Plate / Push Button Spindle Lock

Accessories Saw Blade Wrench (Qty 1) Parallel Guide (Qty 1),

Saw Blade (Qty 1)

Weight 12.9 Pounds

3. Keep bystanders, children, and visitors away while operating a power tool.

Distractions can cause you to lose control. Protect others in the work area from

debris such as chips and sparks. Provide barriers or shields as needed.

PERSONAL SAFETY

1. Stay alert. Watch what you are doing, and use common sense when oper-

ating a power tool. Do not use a power tool while tired or under the influ-

ence of drugs, alcohol, or medication. A moment of inattention while operat-

ing power tools may result in serious personal injury.

2. Dress properly. Do not wear loose clothing or jewelry. Contain long hair.

Keep your hair, clothing, and gloves away from moving parts. Loose

clothes, jewelry, or long hair can be caught in moving parts.

3. Avoid accidental starting. Be sure the Power Switch is off before plugging

in. Carrying power tools with your finger on the Power Switch, or plugging in

power tools with the Power Switch on, invites accidents.

4. Remove adjusting keys or wrenches before turning the power tool on. A

wrench or a key that is 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. Proper

footing and balance enables better control of the power tool in unexpected

situations.

6. Use safety equipment. Always wear ANSI approved safety goggles under-

neath a full face shield, a dust mask or respirator, and hearing protection.

TOOL USE AND CARE

1. Use clamps or other practical ways to secure and support the workpiece to

a stable platform. Never hold the workpiece by hand. Holding the work by hand

is unstable and may lead to loss of control. Only work on a workpiece that is

properly secured.

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 flammables.

1. Keep your work area clean and well lit. Cluttered benches and dark areas

invite accidents.

WORK AREA

SKU 91757 For technical questions please call 1-800-444-3353 PAGE 3

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

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

3. Do not use the power tool if the Power Switch does not turn it on or off.

Any tool that cannot be controlled with the Power Switch is dangerous and must

be replaced.

4. Disconnect the Power Cord Plug from the power source before making any

adjustments, changing accessories, or storing the tool. Such preventive

safety measures reduce the risk of starting the tool accidentally.

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

are dangerous in the hands of untrained users.

6. Maintain tools with care. Do not use a damaged tool. Tag damaged tools “Do

not use” until repaired.

7. Check for misalignment or binding of moving parts, breakage of parts,

cracking or breakage of the Cut-Off Wheel, and any other condition that

may affect the tool’s operation. If damaged, have the tool serviced before

using. Many accidents are caused by poorly maintained tools.

8. Use only accessories that are recommended by the manufacturer for your

model. Accessories that may be suitable for one tool may become hazardous

when used on another tool.

SERVICE

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

or maintenance performed by unqualified personnel could result in a risk of injury.

2. When servicing a tool, use only identical replacement parts. Follow

instructions in the

“Inspection, Maintenance, And Cleaning”

section of this

manual. Use of unauthorized parts or failure to follow maintenance instructions

may create a risk of electric shock or injury.

1. Grounded tools must be plugged into an outlet properly installed and

grounded in accordance with all codes and ordinances. Never remove the

grounding prong or modify the plug in any way. Do not use any adapter

plugs. Check with a qualified electrician if you are in doubt as to whether

the outlet is properly grounded. If the tools should electrically malfunction or

ELECTRICAL SAFETY

SKU 91757 For technical questions please call 1-800-444-3353 PAGE 4

3. Hold tool by insulated gripping surface when performing an operation where the

cutting tool may contact hidden wiring or it’s own cord. Contact with a live “wire”

may expose metal parts of the tool “live” and shock the operator.

break down, grounding provides a low resistance path to carry electricity away

from the user.

2. Double insulated tools are equipped with a polarized plug (one blade is

wider than the other). This plug will fit in a polarized outlet only one way. If

the plug does not fit fully in the outlet, reverse the plug. If it still does not

fit, contact a qualified electrician to install a polarized outlet. Do not

change the plug in any way. Double insulation eliminates the need for the

three wire grounded power cord and grounded power supply system.

3. Avoid body contact with grounded surfaces such as pipes, radiators,

ranges, and refrigerators. There is an increased risk of electric shock if your

body is grounded.

4. Do not expose power tools to rain or wet conditions. Water entering a power

tool will increase the risk of electric shock.

5. Do not abuse the Power Cord. Never use the Power Cord to carry the tools

or pull the Plug from an outlet. Keep the Power Cord away from heat, oil,

sharp edges, or moving parts. Replace damaged Power Cords immedi-

ately. Damaged Power Cords increase the risk of electric shock.

6. When operating a power tool outside, use an outdoor extension cord

marked “W-A” or “W”. These extension cords are rated for outdoor use, and

reduce the risk of electric shock.

GROUNDING

WARNING!

Improperly connecting the grounding wire can result in the risk of electric

shock. Check with a qualified 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 fit the outlet, have a proper

outlet installed by a qualified electrician.

DOUBLE INSULATED TOOLS: TOOLS WITH TWO PRONG PLUGS

1. Tools marked “Double Insulated” do not require grounding. They have a special

double insulation system which satisfies OSHA requirements and complies with

SKU 91757 For technical questions please call 1-800-444-3353 PAGE 5

the applicable standards of Underwriters Laboratories, Inc., the Canadian

Standard Association, and the National Electrical Code. (See Figure A.)

2. Double insulated tools may be used in either of the 120 volt outlets shown in the

following illustration. (See Figure A.)

EXTENSION CORDS

Double Insulated

tools can use either a two or three wire extension cord.

2. As the distance from the supply outlet increases, you must use a heavier gauge

extension cord. Using extension cords with inadequately sized wire causes a

serious drop in voltage, resulting in loss of power and possible tool damage.

(See Figure B, next page.)

3. The smaller the gauge number of the 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 Figure B.)

4. When using more than one extension cord to make up the total length, make

sure each cord contains at least the minimum wire size required.

(See Figure B.)

FIGURE A

5. If you are using one extension cord for more than one tool, add the nameplate

amperes and use the sum to determine the required minimum cord size.

(See Figure B.)

6. If you are using an extension cord outdoors, make sure it is marked with the

suffix “W-A” (“W” in Canada) to indicate it is acceptable for outdoor use.

SKU 91757 For technical questions please call 1-800-444-3353 PAGE 6

7. Make sure your extension cord is properly wired and in good electrical condition.

Always replace a damaged extension cord or have it repaired by a qualified

electrician before using it.

8. Protect your extension cords from sharp objects, excessive heat, and damp or

wet areas.

SYMBOLOGY

V ~

xxxx/min.

FIGURE C

Double Insulated

Canadian Standards

Association

Underwriters

Laboratories, Inc.

Volts Alternating

Current

Amperes

No Load Revolutions

Per Minute (RPM)

RECOMMENDED MINIMUM WIRE GAUGE FOR EXTENSION CORDS*

(120 VOLT)

NAMEPLATE

AMPERES

(At Full Load)

EXTENSION CORD LENGTH

FEET 50

FEET 75

FEET 100

FEET 150

FEET

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 - - -

*Based on limiting the line voltage drop

to five volts at 150% of the rated amperes.

FIGURE B

SKU 91757 For technical questions please call 1-800-444-3353 PAGE 7

SPECIFIC SAFETY RULES

1. Maintain labels and nameplates on the Circular Saw. These carry important

information. If unreadable or missing, contact Harbor Freight Tools for a replace-

ment.

2. DANGER! Keep hands and fingers away from cutting area and Saw

Blade. Keep one hand on the Left/Right Handle (3, 14) and your second

hand on the Second Handle (33, 38) . If both hands are holding the Saw, your

hands and fingers cannot be cut by the Saw Blade.

3. Do not reach under the material being cut. The Lower Guard (78) cannot

protect you from the exposed Saw Blade below the workpiece.

4. Check Lower Guard for proper closing before each use. Do not operate the

Saw if the Lower Guard does not move freely and close instantly. Never

clamp or tie the Lower Guard into the open position. If the Saw is acciden-

tally dropped, the Lower Guard may be bent. Raise the Lower Guard and make

sure it moves freely and does not touch the Saw Blade or any other part, in

all angles and depths of cut.

5. The Lower Guard should be retracted manually only for special cuts such

as “Pocket Cuts” and “Compound Cuts.” Raise the Lower Guard. As soon

as the Saw Blade enters the material, the Lower Guard must be released.

For all other sawing, the Lower Guard should be allowed to operateautomati-

cally.

6. Always use Circular Saw Blades with a 7-1/4” diameter, 5/8” round arbor

hole, and rated at a minimum 5,200 RPM (such as the Harbor FreightTools

model 38542: 7-1/4”, 40T, ATB). Saw Blades that do not match the mounting

hardware of the Saw or that are rated at less than the required minimum RPM

will run eccentrically causing loss of control or may fly off the Saw.

7. Never use a damaged or incorrect Saw Blade Inner/Outer Flange (82, 84) or

Blade Bolt (85). The Circular Saw’s Flanges and Screw were specially designed

fof your Saw, for optimum performance and safety of operation.

8. Use this Circular Saw only to cut wood materials. The included Saw Blade is

designed to cut only wood materials. If using other Saw Blades, only use them

on materials that the Saw Blade manufacturer recommends.

9. To avoid accidental injury, always wear heavy duty work gloves when

changing a Saw Blade.

SKU 91757 For technical questions please call 1-800-444-3353 PAGE 8

10. Make sure the workpiece is free from nails and any other foreign objects

which can damage the Saw Blade (83).

SKU 91757 For technical questions please call 1-800-444-3353 PAGE 9

11. Keep your body positioned to either side of the Saw Blade (83), but not in

line with the Saw Blade. “Kickback”can cause the Saw to jump backwards.

12. Causes and operator prevention of“kickback”: Kickback is a sudden reaction

to a pinched, bound, or misaligned Saw Blade (83), causing an uncontrolled

Saw to lift up and out of the workpiece toward the operator. When the Saw Blade

is pinched or bound tightly by the kerf closing down, the Saw Blade stalls and the

Motor reaction drives the tool rapidly toward the operator. If the Saw Blade

becomes twisted or misaligned in the cut, the teeth at the back edge of the Saw

Blade can dig into the top surface of the workpiece, causing the Saw Blade to

climb out of the kerf and jump back toward the operator. Kickback is a result of

tool misuse and/or incorrect operating procedures or conditions and can

be minimized by taking proper precautions as given below:

A. Maintain a firm grip with both hands on the Saw, and position your body

and arm to allow you to resist kickback forces.

B. When the Saw Blade (83) is binding, or when interrupting a cut for any

reason, release the Power Switch (9) and hold the Saw motionless in

the workpiece until the Saw Blade comes to a complete stop. Never

attempt to remove the Saw from the workpiece or pull the Saw backward

while the Saw Blade is in motion or kickback can occur.

C. When restarting the Saw in the workpiece, center the Saw Blade (83) in

the kerf and check that the saw teeth are not engaged into the

workpiece. If the Saw Blade is binding, it may walk up or kickback from the

workpiece as the Saw is restarted.

D. Support large panels to minimize the risk of Saw Blade pinching and

kickback. Large panels tend to sag under their own weight. Supports must

be placed under the panel on both sides, near the line of cut and near the

edge of the panel.

E. Do not use a dull or damaged Saw Blade (83). Unsharpened or improperly

set Saw Blades produce a narrow kerf causing excessive friction, Saw Blade

binding and kickback.

F. Make sure all Saw adjustments are tight and secure before making a cut.

If Saw adjustments shift while cutting, it may cause binding and kickback.

G. Use caution when making a pocket cut into existing walls or other blind

areas. The Saw Blade (83) may cut objects that can cause kickback. Also,

check to make sure there are no electrical wires or cables in the cutting path.

13. Before using the Circular Saw, make sure the Saw Blade is properly

mounted on the Saw Spindle. Make sure the Saw Blade is balanced, and is

not cracked or bent. Make sure the rotational arrow on the blade is oriented the

same as the rotational arrow on the lower guard.

14. The Saw Blade will become hot while cutting. Allow the Saw Blade to

completely cool before touching.

15. Allow the Saw Blade to spin up to full speed before feeding it into the

workpiece. Do not force the Saw Blade into the workpiece when cutting. Apply

moderate pressure, allowing the Saw Blade to cut without being forced. When

turning off the Saw, allow the Saw Blade to spin down and stop on its own. Do

not press against the Saw Blade to stop it.

16. Turn off the Saw and allow the Saw Blade to stop on its own if the Saw

Blade is to be backed out of an uncompleted cut.

17. Industrial applications must follow OSHA requirements.

18. The Laser (51) on the Circular Saw is a

Class 2

with a maximum radiation of

1mW and 650 wavelength. Do not stare directly at the Laser beam. A hazard

may exist if you deliberately stare into the beam. Never aim the Laser beam at

any person, animal, or an object other than the workpiece.

19. Make sure the Laser (51) beam is aimed at a sturdy workpiece without

reflective surfaces. Reflective surfaces are not suitable for Laser applications,

as the reflective surface may direct the Laser beam back at the operator, causing

potential eye damage.

20. Do not attempt to alter the Laser (51) or replace it with a different type.

Doing so may result in hazardous radiation exposure.

SKU 91757 For technical questions please call 1-800-444-3353 PAGE 10

21. Use the right tool or attachment for the right job. Do not attempt to force a

small tool or attachment to do the work of a larger industrial tool or attachment.

There are certain applications for which this product was designed. It will do the

job better and more safely at the rate for which it was intended. Do not modify

this product, and do not use this product for a purpose for which it was not in-

tended.

22. Always turn off the Circular Saw and unplug the Power Cord (13) from its

electrical outlet before changing accessories, making adjustments, or

performing inspection,maintenance, or cleaning procedures.

23. WARNING! People with pacemakers should consult their physician(s)

before using this product. Operation of electrical equipment in close proximity to

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