Ingersoll-Rand 8478-A1, 8477-A, 8476-A, 8476-A1, 8475-A User Manual
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SECTION
OPERATORS MANUAL
INCLUDING: OPERATION, INSTALLATION & MAINTENANCE
Tool Products
“0004” SERIES GRINDERS
Models: 8475-A-( ), 8475-A1, 8476-A, 8476-A1,
8477-A, 8477-A1, 8478-A and 8478-A1.
MANUAL
Released: 10/72
Revised:
Form: 006-2
READ THIS MANUAL CAREFULLY BEFORE INSTALLING,
OPERATING OR SERVICING THIS EQUIPMENT.
FAILURE TO OBSERVE THE FOLLOWING WARNINGS COULD RESULT IN INJURY.
Do not use excessive work pressure.
To aid the operator’s understanding of proper and safe use of
grinders, the publications, “Use, Care and Protection of Abrasive
Wheels”, A.N.S.I. 87.1, and “Safety Code for Portable Air Tools”,
A.N.S.I. 8188.1, can be purchased from:
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Do not remove any labels. Replace any damaged label.
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Use only accessories recommended by ARO.
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a-
3-l0-95
American National Standards Institute, Inc.
1430 Broadway
New York, New York 16018
Operate this tool at 90 p.s.i.g. (8.2 bar) maximum air pressure
at the air inlet of the tool.
Disconnect air supply from tool before removing/installing
grinding wheel, wire brush or performing other maintenance
procedures.
Keep hands, clothing and long hair away from rotating end of
tool.
Anticipate and be alert for sudden changes in motion during
start up and operation of any power tool.
Never exceed rated r.p.m. of tool.
Wear suitable eye and hearing protection while operating tool.
Tool shaft can continue to rotate briefly after throttle is re-
leased.
Do not lubricate tools with flammable orvolatile liquids such as
kerosene, diesel or jet fuel.
Use tool only for purposes for which it was intended.
Repeated prolonged operator exposure to vibrations which may
be generated in the use of certain hand-held tools may produce
Raynaud’s phenomenon, commonly referred to as Whitefinger
disease. The phenomenon produces numbness and burning
sensations in the hand and may cause circulation and nerve damage as well as tissue necrosis. Repetitive users of hand-held
tools who experience vibrations should closely monitor duration
of use and their physical condition.
The use of other than genuine ARO replacement parts may
result in safety hazards, decreased tool performance and increased maintenance and may invalidate all warranties.
ARO is not responsible for customer modification of tools for
applications on which ARO was not consulted.
Tool maintenance and repair should be performed by authorized, trained, competent personnel. Consult your nearest
ARO authorized servicenter.
It is the responsibility of the employer to place the information
in this manual into the hands of the operator.
For parts and service information, contact your local ARO distributor, or the Customer Service Dept. of the Ingersoll-Rand Distribution
Center, White House, TN at PH: (815) 672-0321, FAX: (615) 672-0601.
ARO Tool Products
Ingersoll-Rand Company
1725 U.S. No. 1 North l PO. Box 8000 l Southern Pines, NC 283888666
Part of world wide Ingersoll-Rand
FAILURE TO OBSERVE THE FOLLOWING WARNINGS COULD RESULT IN INJURY.
I
Wear eye protection when
operating or performing
maintenance on this tool.
Wear hearing protection when
operating this tool.
Turn off air supply and disconnect
,
air supply hose before installing,
removing or adjusting any
accessory on this tool, or before
performing any maintenance on
this tool.
Do not carry the tool by the hose.
Do not overreach when operating
this tool. Keep body stance
balanced and firm.
Air powered tools can vibrate in
use. Vibration, repetitive motions
or uncomfortable positions may
be harmful to your hands and
arms. Stop using any tool if
discomfort, tingling feeling or
pain occurs. Seek medical advice
before resuming use.
Do not use damaged, frayed or
deteriorated air hoses and
fittings.
Operate at 90 p.s.i.g.
(6.2 bar/620 kPa)
maximum air pressure.
NOTICE
PN 48178-1 LABEL PN 49883 LABEL
(NON-EU MODELS) (-EU MODELS)
This label must appear on the tool at all times. If it is
lost or damaged, a replacement label is available at
no cost.
WARNING = Hazards or unsafe practices which could result in severe personal injury, death or substantial
property damage.
CAUTION = Hazards or unsafe practices which could result in minor personal injury or product or property
damage.
NOTICE = important installation, operation or maintenance information.
2
ROUTINE LUBRICATION REQUIREMENTS
Ml0
32
Lack of or an excessive amount of lubrication will affect the performance and life of this tool. Use only recommended lubricants at
below time intervals:
EVERY 8 HOURS OF TOOL OPERATION
- Fill lubricator reservoirof recommended F.R.L. with spindle oil (29665). If an in line or
air line lubricator is not used, apply several drops of spindle oil
(29665) in air inlet.
EVERY 40 HOURS OF TOOL OPERATION
- Flush tool with a
solution of three (3) parts cleaning solvent to one (1) part spindle
oil. After flushing, apply a small amount of spindle oil in air inlet and
run tool for one minute to insure proper lubrication.
AIR SUPPLY REQUIREMENTS
For maximum operating efficiency, the following air supply specifications should be maintained to this air tool:
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AIR PRESSURE - 90 p.s.i.g. (6.2 bar)
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AIR FILTRATION - 50 micron
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LUBRICATED AIR SUPPLY
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HOSE SIZE - 3/8" (10 mm) I.D.
An ARO® model C28231-810 airline FILTER/REGULATOR/LUBRICATOR (F.R.L.) is recommended to maintain the above air
supply specifications.
RECOMMENDED LUBRICANTS
After disassembly is complete, all parts, except sealed or shielded
bearings, should be washed with solvent. To relubricate parts, or
for routine lubrication, use the following recommended lubricants:
Where ARO Description
Air Motor
“O” Rings & Lip Seals
Gears and Bearings 33153 5 lb. “EP” - NLGI #1 Grease
29665
36460 4
1 qt Spindle Oil
oz. Stringy Lubricant
be assigned to be sure that all tools requiring guards or other safety devices shall be kept in legible condition. Maintenance and repair records should be maintained on all tools. Frequency of
repair and the nature of the repairs can reveal unsafe application.
Scheduled maintenance by competent authorized personnel
should detect any mistreatment or abuse of the tool and worn
parts. Corrective action should be taken before returning the tool
for use.
Disassembly should be done on a clean work bench with a clean
cloth spread to prevent the loss of small parts. After disassembly
is completed, all parts should be thoroughly washed in a clean solvent, blown dry with air and inspected for wear levels, abuse and
contamination. Double sealed or shielded bearings should never
be placed in solvent unless a good method of m-lubricating the
bearing is available. Open bearings may be washed but should
not be allowed to spin while being blown dry.
Upon reassembling, lubricate parts where required. Use 33153
grease, or equivalent, in bearings. Use 36460 lubricant for “O”
ring assembly. When assembling “O” rings or parts adjacent “O”
rings, care must be exercised to prevent damage to the rubber
sealing surfaces. A small amount of grease will usually hold steel
balls and other small parts in place while assembling.
Before mounting a wheel, after all tool repairs and whenever a
grinder is issued for use, the speed of the grinder shall be checked
with a tachometer to make certain that its actual speed does not
exceed its rated speed.
When replacement parts are necessary, consult drawing containing the part for identification.
Always use clean, dry air. Dust, corrosive fumes and/or excessive
moisture can damage the motor of an air tool. An air line filter can
greatly increase the life of an air tool. The filter removes rust,
scale, moisture and other debris from the air lines. Low air pressure (less than 90 p.s.i.g.) reduces the speed of the air tool. High
air pressure (more than 90 p.s.i.g.) raises performance beyond
the rated capacity of the tool and could cause injury. Shown below
is a typical piping arrangement.
INSPECTION, MAINTENANCE AND INSTALLATION
Disconnect air supply from the tool or shut off air supply and exhaust (drain) line of compressed air before performing maintenance or service to the tool.
It is important that the tools be serviced and inspected at regular
intervals for maintaining safe, trouble free operation of the tool.
Be sure the tool is receiving adequate lubrication, as failure to Iubricate can create hazardous operating conditions resulting from
excessive wear.
Be sure that the air supply lines and connectors are of proper size
to provide a sufficient quantity of air to the tool.
Tool maintenance and repair shall be performed by authorized,
trained, competent personnel. Tools, hose and fittings shall be replaced if unsuitable for safe operation and responsibility should
MAIN LINES 3 TIMES
AIR TOOL INLET SIZE
TO
AIR SYSTEM
E TOOL
LUBRICATOR
REGULATOR
BRANCH UNE 2 TIME
AIR TOOL INLET SIZE
DRAIN REGULARLY
\ -
COMPRESSOR
3
MODEL IDENTIFICATION
The grinder models listed in the model identification table above are furnished with a collet as standard equipment and are intended for
use with mounted wheels and shall not be used with other type grinding wheels. Other size collet inserts or other collet assemblies listed
on page 10 can be furnished with the above listed models.
OPERATION
Safe and efficient operation of your ARO grinder can best be attained by observing proper operating, inspection and maintenance procedures. Allow only competent and qualified people to operate grinder and subject each grinder to a regular inspection and maintenance
procedure. The qualified grinder operator must be carefully instructed in the safe operation and use of the grinder, including a study of the
manufacturer’s literature. The grinder operator should have a good attitude regarding safety.
Operator Safety Equipment. The grinder operator shall wear safety goggles or face shield at all times the grinder is turned on. Other
protective clothing shall be worn if necessary for spark deflection.
Respirators shall be used in poorly ventilated areas. Adjacent personnel shall be protected from grinding sparks and wheel fragments by protective barriers.
Starting and Stopping. Before starting a grinder, the operator shall
make sure that no one is in the unguarded plane of wheel rotation.
Upon mounting a new wheel, grinder shall be run at operating
speed with the safety guard in place or in a protected enclosure for
at least one minute before applying the wheel to the work. Check
speed and balance of wheel.
Before a grinder is put down, the throttle shall be released and the
wheel shall come to a stop. Tool rests, hangers or balancers are
recommended.
MOUNTING INSTRUCTIONS FOR MOUNTED WHEELS
The collet shall be checked to assure it to be in good condition and
properly affixed to the grinder spindle.
The mandrel shall be inserted to the full depth of the gripping jaws
of the Collet. At least 1/2 the mandrel length shall be inserted into
the Collet.
The maximum safe operating speed for mounted wheels shall be
determined by the following: 1.) Shape and size of the mounted
wheel, 2.) Size of mandrel and 3.) Overhang of mandrel. In no
case shall the maximum safe operating speed recommended by
the wheel manufacturer be exceeded.
Use only wheels with adequate speed ratings. The maximum operating speed marked on the wheel, blotters or packaging, shall
equal or exceed the rated speed stamped on the grinder.
At each wheel change, Aro recommends the free speed be
checked by competent authorized personnel, using a good reliable tachometer, to assure that the maximum tool speed is lower
than manufacturers rated speed for the wheel to be used. A speed
check shall never be made with grinding wheel on the grinder.
Grinders shall not be operated at a speed exceeding its rated
speed.
If a wire brush should ever be used with this tool; insure the speed
rating of the brush is greater than the speed of the tool the brush is
to be used with and insure the brush conforms to applicable safety
standards. Be certain the brush is compatible with mounting of the
tool. Always use a wheel guard.
WARNING: Work pressure, if excessive, can be the cause of
trouble and a source of danger, thru bending or fracture of
the mandrel. Pressure between the wheel and the work
should never be so heavy that springing of the mandrel will
result.
IMPORTANT NOTICE: Increasing the overhang of the mandrel will reduce the maximum wheel size that can be safely used with
the speed of the tool (dimension “O”, figure 1). Also, the length and diameter of mandrel combined with the size and shape of the
wheel are determining factors which must beconsidered when selecting a mounted wheel that will be compatible with the rated
free speed of the tool. It is recommended the “Tables of Maximum Operating Speeds for Mounted Wheels” of the American
National Standard publication B7.1-1978 previously mentioned or other reliable source, be consulted to determine the safe
operating speed of a particular size and shape of wheel combined with the size and overhang of mandrel.
MANDREL OVERHANG - DIMENSION “O”
FIGURE 1
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