Central Pneumatic 47077 User manual

3” HIGH SPEED AIR CUTTER
47077
ASSEMBLY AND OPERATING INSTRUCTIONS
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.
Copyright©2002 by Harbor Freight Tools®. All rights reserved. No portion of this manual or any artwork
contained herein may be reproduced in any shape or form without the express written consent of Harbor
FreightTools. 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.
REV 09i
(Cutting Disc not included)

SKU 47077 For technical questions, please call 1-800-444-3353. Page 2
SPECIFICATIONS
REV 04i, 09i
SAVE THIS MANUAL
You will need this manual for the safety warnings and precautions, assembly, operat-
ing, 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 WARNINGS AND PRECAUTIONS
1. KEEP WORK AREA CLEAN AND DRY. Cluttered, damp, or wet work areas
invite injuries.
2. KEEP CHILDREN AWAY FROM WORK AREA. Do not allow children to handle
this product.
3. STORE IDLE EQUIPMENT. When not in use, tools and equipment should be
stored in a dry location to inhibit rust. Always lock up tools and equipment, and
keep out of reach of children.
4. DO NOT USE THIS PRODUCT IF UNDER THE INFLUENCE OF ALCOHOL OR
DRUGS. Read warning labels on prescriptions to determine if your judgement or
reflexes are impaired while taking drugs. If there is any doubt, do not attempt to
use this product.
5. USE EYE AND HAND PROTECTION. Wear ANSI-approved safety impact eye-
glasses and heavy-duty work gloves when using this product. ANSI-approved
safety impact eyeglasses and heavy-duty work gloves are available from Harbor
Freight Tools.
6. DRESS SAFELY. Do not wear loose clothing or jewelry, as they can become
caught in moving parts. Wear a protective hair covering to prevent long hair from
becoming caught in moving parts. If wearing a long-sleeve shirt, roll sleeves up
above elbows.
Cutting Disc. Size 3” Diameter (not included)
Required Disc. Rating 18,000 RPM Minimum
Arbor Size 3/8”
Hose Size 3/8”
Maximum Pressure 90 PSI
Air Inlet Fitting Size 1/4” - 18 NPT Female
Maximum Rated Speed 18,000 RPM at 90 PSI
Air Consumption 5.5 SCFM
Weight 1.6 Lb.
Tool Accessories Hex Key Wrench, Spanner

SKU 47077 For technical questions, please call 1-800-444-3353. Page 3
7. DO NOT OVERREACH. Keep proper footing and balance at all times to prevent
tripping, falling, back injury, etcetera.
8. INDUSTRIAL APPLICATIONS MUST FOLLOW OSHA REQUIREMENTS.
9. STAY ALERT. Watch what you are doing at all times. Use common sense. Do
not use this product when you are tired of distracted from the job at hand.
10. CHECK FOR DAMAGED PARTS. Before using this product, carefully check that
it will operate properly and perform its intended function. Check for damaged
parts and any other conditions that may affect the operation of this product. Re-
place or repair damaged or worn parts immediately.
11. REPLACEMENT PARTS AND ACCESSORIES: When servicing, use only identi-
cal replacement parts. Only use accessories intended for use with this product.
Approved accessories are available from Harbor Freight Tools.
12. MAINTAIN THIS PRODUCT WITH CARE. Keep this product clean and dry for
better and safer performance.
13. MAINTENANCE: For your safety, service and maintenance should be performed
regularly by a qualified technician.
14. USE THE RIGHT PRODUCT FOR THE RIGHT JOB. There are certain applica-
tions for which this product was designed. Do not use small equipment, tools, or
attachments to do the work of larger industrial equipment, tools, or attachments.
Do not use this product for a purpose for which it was not intended.
15. WARNING: The warnings, precautions, and instructions discussed in this manu-
al cannot cover all possible conditions and situations that may occur. The opera-
tor must understand that common sense and caution are factors, which cannot
be built into this product, but must be supplied by the operator.
SPECIFIC PRODUCT WARNINGS AND PRECAUTIONS
1. USE CLEAN, DRY, REGULATED COMPRESSED AIR AT NO MORE THAN 90
PSI. Never use oxygen, carbon dioxide, combustible gases, or any other bottled
gas as a power source for this tool.
2. NOTE: An air compressor is not provided. You will need an air compressor with a
minimum rating of one horsepower, 5.5 SCFM delivery at 90 PSI, and a 12 gallon
air tank.
3. WHEN CONNECTING TO THE AIR SUPPLY: Prior to each use, if an automatic
oiler is not used, add two drops of air tool oil (not provided) into the Inlet Bush-
ing (1) of the Air Cutter. Turn on the air compressor, and set the regulator to the
recommended 90 PSI for this tool. (See Figures A, B, and Assy. Diagram.)

SKU 47077 For technical questions, please call 1-800-444-3353. Page 4
4. DO NOT MODIFY THE SAFETY SHUT-OFF MECHANISM. The Throttle Lever
(3) on the Air Cutter features a Safety Lock (7), which is a safety shut-off mecha-
nism. When pressure is released from the Throttle Lever, the Safety Lock will
automatically shut off the tool. For your safety, and the safety of others, do not
modify the Safety Lock in any way. (See Figure B, and Assy. Diagram.)
5. MAINTAIN A SAFE WORKING ENVIRONMENT. Keep the work area well lit.
Make sure there is adequate surrounding workspace. Always keep the work area
free of obstructions, grease, oil, trash, and other debris. Do not use the Air Cutter
in areas near flammable chemicals, dusts, and vapors.
6. TO AVOID PERSONAL INJURY, ALWAYS KEEP HANDS, FINGERS, AND
FEET AWAY FROM THE SPINNING CUTTING DISC.
(See Figure B, and Assy. Diagram.)
7. ALWAYS DISCONNECT THE AIR CUTTER FROM ITS COMPRESSED AIR
SUPPLY SOURCE BEFORE PERFORMING ANY SERVICES OR MAINTE-
NANCE. Make sure to disconnect the Air Cutter from its compressed air supply
source when leaving the work area, moving the tool from one location to another,
handing the tool to another person, etcetera.
8. MAKE SURE TO REMOVE ALL ADJUSTING WRENCHES FROM THE AIR
CUTTER PRIOR TO USING.
9. WARNING: Only use 3” Cutting Discs rated at more than 18,000 RPM and great-
er.
10. DO NOT USE UNAPPROVED ACCESSORIES. Do not use circular saw blades
or wire brushes on this tool. Do not use any accessory except a 3” diameter Cut-
ting Disc.
FIGURE A
TO TOOL
QUICK
CONNECTOR
QUICK
COUPLER
QUICK
CONNECTOR
OILER
AIR
COMPRESSOR
QUICK
COUPLER
REGULATOR
AIR HOSE
FILTER

SKU 47077 For technical questions, please call 1-800-444-3353. Page 5
UNPACKING
When unpacking, check to make sure all the parts shown on the Parts List (page 8) 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.
ASSEMBLY INSTRUCTIONS
NOTE: For additional references to the parts listed below, refer to the Assembly
Diagram on page 8.
To Connect An Air Hose To The Air Cutter:
The Air Cutter requires the attachment of a 1/4”-18 NPT Male Quick Connector
(not provided). To attach a Quick Connector to the Air Cutter, wrap the threaded
portion of the Quick Connector with about 3” of pipe thread seal tape (not
provided). Next, wrench tighten the Quick Connector into the Inlet Bushing (1) of
the Air Cutter. Then, connect the Quick Coupler of an air hose (not
provided) onto the Quick Connector. (See Figures A, B, and Assy. Diagram.)
To Attach The 3” Cutting Disc:
1. Use the Spanner (36) to hold the Spindle (32) in place while, at the same time,
loosening and removing the Hex Bolt (35) and Flange (34) with the Hex Key
Wrench (37). (See Figure B, and Assy. Diagram.)
11. DO NOT REMOVE THE PROTECTION GUARD (30). Always leave the Protec-
tion Guard in place. Never use the Air Cutter without the Protection Guard in
place and in proper working condition.
12. WARNING: Some dust created by power sanding, sawing, grinding, drilling, and
other construction activities, contain chemicals known (to the State of California)
to cause cancer, birth defects or other reproductive harm. Some examples of
these chemicals are: lead from lead-based paints, crystalline silica from bricks
and cement or other masonry products, arsenic and chromium from chemically
treated lumber. Your risk from these exposures varies, 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 designed to filter out microscopic particles.
The brass components of this product contain lead, a chemical known to the
State of California to cause birth defects (or other reproductive harm).
(California Health & Safety Code § 25249.5, et seq.)
REV 04i; 07a