Ingersoll-Rand 7978 User Manual
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OPERATOR’S MANUAL
INCLUDING:ĂOPERATION,ĂINSTALLATIONĂ&ĂMAINTENANCE
SECTION M10
MANUAL 15
Released: 10/81
Revised: 1-20-00
60,000 R.P.M. PENCIL GRINDER
Form: 1956-2
Models: 7978–( )
WARNING
READ THIS MANUAL CAREFULLY BEFORE INSTALLING,
OPERATING OR SERVICING THIS EQUIPMENT.
FAILURE TO OBSERVE THE FOLLOWING WARNINGS COULD RESULT IN INJURY.
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. B7.1, and ‘‘Safety Code for Portable Air Tools”,
A.N.S.I. B186.1, can be purchased from:
American National Standards Institute, Inc.
1430 Broadway
New York, New York 10018
WARNING
• Operate this tool at 90 p.s.i.g. (6.2 bar) maximum air pressure
at the air inlet of the tool.
• Disconnect air supply from tool before removing/installing
mounted wheel 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 or volatile liquids such as
kerosene, diesel or jet fuel.
• Use tool only for purposes for which it was intended.
• Never use mounted stone or carbide burr with speed rating
lower than r.p.m. rating of tool.
• Do not use excessive work pressure.
• Allow only people who have received training in ‘‘proper grind-
er operation” to operate grinder.
• Do not remove any labels. Replace any damaged label.
• Use only accessories recommended by ARO.
WARNING
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.
NOTICE
• 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 autho-
rized, 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: (615) 672–0321, FAX: (615) 672–0801.
ARO Tool Products
Ingersoll–Rand Company
1725 U.S. No. 1 North D P.O. Box 8000 D Southern Pines, NC 28388–8000
E2000 INGERSOLL–RAND COMPANY D PRINTED IN U.S.A.
FAILURE TO OBSERVE THE FOLLOWING WARNINGS COULD RESULT IN INJURY.
WARNING
Wear eye protection when
operating or performing
maintenance on this tool.
WARNING
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.
WARNING
Do not carry the tool by the hose.
WARNING
Wear hearing protection when
operating this tool.
WARNING
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.
WARNING
Do not use damaged, frayed or
deteriorated air hoses and
fittings.
WARNING
Do not overreach when operating
this tool. Keep body stance
balanced and firm.
WARNING
Operate at 90 p.s.i.g.
(6.2 bar/620 kPa)
maximum air pressure.
NOTICE
WARNING
Read the manual before
operating this tool.
Operate at 90 psig/6.2 bar max.
PN 48176–1 LABEL
(NON–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.
PN 49883 LABEL
(–EU MODELS)
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
Lack of or a n e x c e ssive amount of lubrication will af fect the performance and life of this tool. Use only recommended lubricants at
below time intervals:
EVERY 8 HOURS OF T OOL OPERATION – Fill lubricator reser-
voir of 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.
AIR SUPPLY REQUIREMENTS
For maximum operating efficiency, the following air supply specifications should be maintained to this air tool:
• AIR PRESSURE – 90 p.s.i.g. (6.2 bar)
• AIR FILTRATION – 50 micron
• LUBRICATED AIR SUPPLY
• HOSE SIZE – 3/16” (5 mm) I.D.
An AROR model 128121–800 air line 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:
M10
15
Be sure the tool is receiving adequate lubrication, as failure to lubricate 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
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 t h e n a t u r e o f t h e r e p a i r s c a n r e v e a l u n s a f e a p plication.
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 re–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.
When replacement parts are necessary, consult drawing containing the part for identification.
Where Used ARO Part # Description
Air Motor 29665 1 qt Spindle Oil
‘‘O” Rings 36460 4 oz. Stringy Lubricant
Bearings 33153 5 lb. ``EP" - NLGI #1 Grease
MOUNTING INSTRUCTIONS
• Be sure collet is in good condition and properly secured to
grinder spindle.
• Insert shaft of mounted wheel to the full depth of gripping jaws
of collet. At least one–half of shaft length shall be inserted into
collet jaws.
• Be sure mounted stone or carbide bur is compatible with the
speed of the grinder.
CAPACITIES (MAXIMUM)
• Carbide Bur – 1/4”
• Mounted Stone – 1/4”
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.
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.
MAIN LINES 3 TIMES
AIR TOOL INLET SIZE
TO
AIR
SYSTEM
TO
AIR
TOOL
LUBRICATOR
REGULATOR FILTER
BRANCH LINE 2 TIMES
AIR TOOL INLET SIZE
COMPRESSOR
DRAIN REGULARLY
(TPD905–1)
3
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