Chicago Pneumatic 46388 User manual

4” AIR ANGLE GRINDER4” AIR ANGLE GRINDER

4” AIR ANGLE GRINDER

ASSEMBLY AND OPERATING INSTRUCTIONS

3491 Mission Oaks Blvd., Camarillo, CA 93011

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

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 and replacement parts, please call 1-800-444-3353

46388

SKU 46388 Page 2

Specifications

Save This Manual

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

instructions, operating and maintenance procedures, parts list and diagram. Keep

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

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

Safety Warnings and Precautions

WARNING: When using tool, basic safety precautions should always be fol-

lowed to reduce the risk of personal injury and damage to equipment.

Read all instructions before using this tool!

1. Keep work area clean. Cluttered areas invite injuries.

2. Observe work area conditions. Do not use machines or power tools in

damp or wet locations. Don’t expose to rain. Keep work area well lighted. Do

not use electrically powered tools in the presence of flammable gases or

liquids.

3. Keep children away. Children must never be allowed in the work area. Do

not let them handle machines, tools, or extension cords.

4. Store idle equipment. When not in use, tools must be stored in a dry

location to inhibit rust. Always lock up tools and keep out of reach of

children.

5. Do not force tool. It will do the job better and more safely at the rate for

which it was intended. Do not use inappropriate attachments in an attempt

to exceed the tool capacity.

ITEM

Overall Dimensions

Handle Dimensions

Inlet Size

Max. Rated Air Pressure

Air Consumption

Revolutions per Minute

Wheel Material

Wheel Dimensions

Arbor Diameter

Arbor Tolerance

Spindle Thread

Net Weight

DESCRIPTION

6-3/4”W x 7-1/2”L x 3-5/8”H

1”Dia. x 3-1/8”L (left side only)

1/4” - 18 NPT

90 PSI

4 CFM

11,000

Resin bonded aluminum oxide grit

4”Diameter x 1/4”Thickness

5/8”

+.005”/- Nothing

3/8” - 20 TPI

3.35 Lbs.

SKU 46388 Page 3

6. Use the right tool for the job. Do not attempt to force a small tool or

attachment to do the work of a larger industrial tool. There are certain

applications for which this tool was designed. Do not modify this tool and do

not use this tool for a purpose for which it was not intended.

7. Dress properly. Do not wear loose clothing or jewelry as they can be caught

in moving parts. Protective, electrically non-conductive clothes and non-skid

footwear are recommended when working. Wear restrictive hair covering to

contain long hair.

8. Use eye and ear protection. Always wear ANSI approved impact safety

goggles. Wear a full face shield if you are producing metal filings or wood

chips. Wear an ANSI approved dust mask or respirator when working around

metal, wood, and chemical dusts and mists.

9. Do not overreach. Keep proper footing and balance at all times. Do not

reach over or across running machines.

10. Maintain tools with care. Keep tools sharp and clean for better and safer

performance. Follow instructions for changing accessories. Inspect tool

cords periodically and, if damaged, have them repaired by an authorized

technician. The handles must be kept clean, dry, and free from oil and

grease at all times.

11. Disconnect when not in use. Disconnect tool from air compressor hose

when not in use.

12. Remove adjusting keys and wrenches. Check that keys and adjusting

wrenches are removed from the tool or machine work surface before plugging

it in.

13. Avoid unintentional starting. Be sure the switch is in the Off position when

not in use and before plugging in.

14. Stay alert. Watch what you are doing, use common sense. Do not operate

any tool when you are tired.

15. Take caution as some woods contain preservatives such as copper

chromium arsenate (CCA) which can be toxic. When working with these

materials extra care should be taken to avoid inhalation and minimize skin

contact.

16. Check for damaged parts. Before using any tool, any part that appears

damaged should be carefully checked to determine that it will operate

properly and perform its intended function. Check for alignment and binding

SKU 46388 Page 4

of moving parts, and any other condition that may affect proper operation.

Any part that is damaged should be properly repaired or replaced by a

qualified technician. Do not use the tool if any switch does not turn On and

Off properly.

17. Guard against electric shock. Prevent body contact with grounded

surfaces such as pipes, radiators, ranges, and refrigerator enclosures.

18. Replacement parts and accessories. When servicing, use only identical

replacement parts. Use of any other parts will void the warranty. Only use

accessories intended for use with this tool. Approved accessories are

available from Harbor Freight Tools.

19. Do not operate tool if under the influence of alcohol or drugs. Read

warning labels on prescriptions to determine if your judgment or reflexes are

impaired while taking drugs. If there is any doubt, do not operate the tool.

20. Use proper size and type extension cord. If an extension cord is required,

it must be of the proper size and type to supply the correct current to the tool

without heating up. Otherwise, the extension cord could melt and catch fire, or

cause electrical damage to the tool. This tool requires use of an extension

cord of 0 to 10 amps capability (up to 50 feet), with wire size rated at 18

AWG. Longer extension cords require larger size wire. If you are using the

tool outdoors, use an extension cord rated for outdoor use. (signified by “WA”

on the jacket).

21. Maintenance. For your safety, service and maintenance should be

performed regularly by a qualified technician.

Note: Performance of this tool (if powered by line voltage) may vary depending on

variations in local line voltage. Extension cord usage may also affect tool perfor-

mance.

Warning: People with pacemakers should consult with their physician(s)

before using this product; operation of equipment in close proximity to a heart

pacemaker could cause interference or failure of the pacemaker.

Warning: The warnings, cautions, and instructions discussed in this instruc-

tion manual cannot cover all possible conditions and situations that may oc-

cur. 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.

Special Warnings for This Tool

1. There are certain applications for which this tool was designed. Harbor

Freight Tools strongly recommends that this tool not be modified and/or used

for any application other than which it was designed.

SKU 46388 Page 5

2. All accessories must be rated for at least the RPM speed recommended on

the tool's warning label. Wheels and other accessories running over rated

speed can fly apart and cause injury.

3. For safest operation, it is recommended that only these accessories be used

with this product: Abrasive Cut-Off Discs and Wheels, Flap Wheels, Wire

Brushes, Wire Wheel Brushes.

4. Always use an approved and proper guard when using the above mentioned

accessories. Each accessory must have the correct arbor size and must fit

properly on the Gear Shaft. Make sure accessories are tightened down

securely.

5. Always disconnect from power source before adding or removing

accessories. Use a cloth or glove to protect hands from abrasion.

6. The Handle must be used at all times to maintain complete control of the

tool.

Caution: Never install a carbide tipped or steel circular saw blade for use

with this Angle Grinder. Never install a wood carving blade, carving disc with

saw chain cutters, or a cutting carving disc on this Angle Grinder.

Unpacking

When unpacking, check to make all parts listed on Page 8 are included. If any

parts are missing or broken, please call Harbor Freight Tools at the number on

the cover of this manual.

Air Connection

Note: Air Compressor is not supplied. You will need an Air Compressor with a

minimum rating of One Horsepower, 4 CFM delivery at 90 PSI, and a 12 Gallon

Air Tank.

You may use Couplings (not supplied) as shown in the Diagram above. Do not

connect Couplers directly to the Air Inlet. Doing so will increase the overall bulk of

the tool and strain the Inlet Threads.

SKU 46388 Page 6

1. Be sure to follow all safety precautions as listed on Pages 2-5 of this manual.

2. Acquire a Union fitting (not supplied) and screw into the Air Inlet fitting.

Tighten with a wrench.

3. Attach a quick-coupler (not supplied) to the Union fitting if desired. This

allows quick exchange of the Air Hose to other air tools.

4. Connect the Air Hose to the Air Inlet Coupling.

This air tool requires lubrication during operation. For best results, it is recom-

mended to have an oiler and water filter in line with the air supply as shown. This

will extend the life of the tool.

Attaching/Changing the

Wheel Accessory

1. Fit the U-shaped end of the

Stop Spanner [33] around

the Gear Shaft [6] and hold

in place to prevent the

Shaft from spinning. Insert

the two prongs on the end

of the Disc Spanner [34]

into the corresponding

holes in the Disc Nut [1] and turn your wrist to unscrew the Disc Nut. See Fig.

A, right.

2. Slide the Disc Wheel [2] onto the Shaft.

3. Replace the Disc Nut and tighten using the Stop Spanner and Disc Spanner.

DANGER Grinding wheel used must be rated at 11,000 RPM or

higher.

Operation

1. Always wear ANSI approved impact safety goggles when using this tool.

2. Tighten all work pieces to your work surface with a clamp or vise so that both

of your hands are free to operate the Grinder.

3. Screw the Handle [35] into the threaded inlet on the side of the Angle

Housing [13] as shown in the Assembly Diagram on Page 8.

4. Set the Air Compressor’s pressure regulator to 90 PSI. Connect the Grinder

to the Air Compressor’s hose.

Fig. A

SKU 46388 Page 7

PLEASE READ THE FOLLOWING CAREFULLY

THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS DIAGRAM

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

NOR 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 QUALIFIED TO REPLACE ANY PARTS OF THE

PRODUCT. IN FACT, THE MANUFACTURER AND/OR 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.

5. Check to be sure all attachments are secure before turning on the tool. Adjust

the Wheel Guard so that it provides a shield between you (the user) and the

material you are working on. The Wheel Guard must be in place at all

times when using the Angle Grinder.

6. Grip the Handle with your left hand and the Housing [25] with your right.

Depress the Trigger [31] with your right hand to turn the tool on. Allow the

motor to reach its full speed before grinding. Make sure the Wheel is

rotating evenly and all parts appear to be working properly. Always maintain

a firm grip with both hands when operating this tool.

7. To begin cutting or grinding, approach the material at an angle between 15

and 30 degrees to the Wheel. Maintain that angle until you are finished

cutting/grinding. Do not force the Wheel or apply too much pressure. If the

Wheel slows down as you work with your material, you are applying too

much pressure.

8. Once you have turned the Grinder off, continue to hold onto the tool with

both hands until the motor stops completely before you set it down.

SKU 46388 Page 8

Assembly Drawing

Parts List

DESCRIPTION

Disc Nut

Disc Wheel

Screw

Spring Washer

Disc Cover

Gear Shaft

Key

Ball Bearing

Bevel Gear

Retaining Ring

Ball Bearing

Spacer

Angle Housing

Screw

Packing

Pinion Gear

Front Plate

ITEM

QTY

DESCRIPTION

Bearing Spacer

Rotor

Rotor Blade

Cylinder

Steel Ball

Bear Plate

Housing

Air Inlet

Screw

Spring

Valve Stem Bushing

Valve Stem

Lever

Spring Pin

Stop Spanner

Disc Spanner

Handle

ITEM

QTY

NOTE: Some parts are listed and

shown for illustration purposes only

and are not available individually as

replacement parts.

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