Ingersoll Rand Electric Pencil Sharpener 7978

SECTION  
MANUAL  
Released:  
Revised:  
Form:  
M10  
15  
)
OPERATOR’S MANUAL  
INCLUDING:ĂOPERATION,ĂINSTALLATIONĂ&ĂMAINTENANCE  
10/81  
1-20-00  
1956-2  
60,000 R.P.M. PENCIL GRINDER  
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:  
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.  
American National Standards Institute, Inc.  
1430 Broadway  
WARNING  
New York, New York 10018  
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 dam-  
age as well as tissue necrosis. Repetitive users of hand–held  
tools who experience vibrations should closely monitor duration  
of use and their physical condition.  
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.  
NOTICE  
The use of other than genuine ARO replacement parts may  
result in safety hazards, decreased tool performance and in-  
creased 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.  
 
M10  
15  
ROUTINE LUBRICATION REQUIREMENTS  
Be sure the tool is receiving adequate lubrication, as failure to lu-  
bricate can create hazardous operating conditions resulting from  
excessive wear.  
Lack of or an excessive amount of lubrication will affect the perfor-  
mance and life of this tool. Use only recommended lubricants at  
below time intervals:  
Be sure that the air supply lines and connectors are of proper size  
to provide a sufficient quantity of air to the tool.  
EVERY 8 HOURS OF TOOL 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.  
Tool maintenance and repair shall be performed by authorized,  
trained, competent personnel. Tools, hose and fittings shall be re-  
placed if unsuitable for safe operation and responsibility should  
be assigned to be sure that all tools requiring guards or other safe-  
ty devices shall be kept in legible condition. Maintenance and re-  
pair 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.  
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 specifi-  
cations should be maintained to this air tool:  
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 sol-  
vent, 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 relubricating the  
bearing is available. Open bearings may be washed but should  
not be allowed to spin while being blown dry.  
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 128121800 air line FILTER/REGULATOR/LU-  
BRICATOR (F.R.L.) is recommended to maintain the above air  
supply specifications.  
Upon reassembling, lubricate parts where required. Use 33153  
grease, or equivalent, in bearings. Use 36460 lubricant for ‘‘O”  
ring assembly. When assembling ‘‘Orings 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.  
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:  
When replacement parts are necessary, consult drawing contain-  
ing 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 pres-  
sure (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.  
Where Used  
Air Motor  
‘‘ORings  
Bearings  
ARO Part #  
29665  
Description  
1 qt Spindle Oil  
4 oz. Stringy Lubricant  
5 lb. ``EP" - NLGI #1 Grease  
36460  
33153  
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 onehalf of shaft length shall be inserted into  
collet jaws.  
MAIN LINES 3 TIMES  
AIR TOOL INLET SIZE  
Be sure mounted stone or carbide bur is compatible with the  
speed of the grinder.  
TO  
AIR  
SYSTEM  
CAPACITIES (MAXIMUM)  
TO  
AIR  
TOOL  
Carbide Bur 1/4”  
Mounted Stone 1/4”  
INSPECTION, MAINTENANCE AND INSTALLATION  
LUBRICATOR  
REGULATOR  
FILTER  
Disconnect air supply from the tool or shut off air supply and ex-  
haust (drain) line of compressed air before performing mainte-  
nance or service to the tool.  
BRANCH LINE 2 TIMES  
AIR TOOL INLET SIZE  
It is important that the tools be serviced and inspected at regular  
intervals for maintaining safe, troublefree operation of the tool.  
COMPRESSOR  
DRAIN REGULARLY  
(TPD9051)  
3
 
MODEL IDENTIFICATION  
MODEL HOUSING  
NUMBER  
MOTOR  
COLLET  
COLLET  
ASSEMBLY ASSEMBLY CAPACITY  
7978  
46114  
46114  
46114  
49914  
46112  
461192  
461193  
461191  
461193  
1/8”  
79781  
79782  
7978EU  
461121  
461122  
461121  
3 mm  
3/32”  
3 mm  
MODELS WITH EU SUFFIX ARE ‘‘ECCOMPLIANT MODELS.  
DISASSEMBLY/ASSEMBLY INSTRUCTIONS  
Disconnect air supply from tool or shut off air supply and drain line  
tool are as follows:  
of compressed air before performing maintenance or service to  
tool.  
THROTTLE SECTION  
Before starting to disassemble or assemble this tool (any part or  
completely), be sure to read ‘‘Inspection, Maintenance and Instal-  
lationsection.  
Remove hose assembly from tool. Using 11/16diameter blocks,  
clamp housing (46114 or 49914) in a vise (see grip area below)  
and unthread throttle section from housing. NOTE: Thread adhe-  
sive has been applied to these threads.  
To minimize the possibility of parts damage and for convenience,  
the steps for disassembly or assembly listed on the following  
pages are recommended.  
MOTOR SECTION  
After removal of throttle section, motor assembly can be removed  
from the housing.  
The basic sections and instructions for removing them from the  
(ATP59)  
THROTTLE SECTION  
to clean screen. Whenever a part containing ‘‘Orings has  
been removed from the tool, it is recommended the ‘‘Orings  
be replaced with new ones before assembling the part to the  
tool. Lubricate all ‘‘Orings with ARO 36460 lubricant at as-  
sembly.  
DISASSEMBLY  
_
_
_
_
Remove throttle as outlined above.  
Remove pipe fitting (Y4341C) from throttle.  
Remove snap ring (Y1105).  
Remove sleeve (46106) for access to two ‘‘Orings  
(Y32510) and ‘‘Oring (Y32512).  
_
Assemble two ‘‘Orings (Y32510) and ‘‘Oring (Y32512) to  
throttle.  
_
_
Assemble ‘‘Oring (Y32513) to throttle.  
Slide sleeve (46106) onto throttle and secure with snap ring  
(Y1105).  
ASSEMBLY  
_
NOTE: Throttle contains an internal filter screen. Wash throttle  
thoroughly in clean solvent and blow air backward thru throttle  
_
Assemble pipe fitting (Y4341C) to end of throttle.  
4
 
M10  
15  
MOTOR SECTION  
_
Assemble end plate (46108), with spacer (46103), to rotor. Us-  
ing brass blocks in a vise, as for disassembly, clamp on rotor  
and assemble collet body to rotor (apply thread adhesive to  
threads) and tighten to 20 25 in. lbs torque.  
Coat i.d. of cylinder with spindle oil and assemble to rotor. As-  
semble blades to rotor.  
DISASSEMBLY  
_
_
Remove motor assembly as outlined on page 4.  
Grasp cylinder in one hand and, with the same hand, hold a  
punch against the rear of the rotor. Tap punch to remove bear-  
ing (46110) and end plate (46107) from rotor. Remove cylinder  
and blades from rotor.  
Using brass blocks (1/4diameter) in a vise; clamp on rotor  
and remove collet body, bearing, end plate and spacer from  
rotor.  
_
_
_
_
_
Pack bearing (46110) with ARO 33153 grease and assemble  
to end plate (46107).  
Assemble end plate to rotor. Push rotor to rear and press inner  
race of bearing (46110) to remove axial play.  
Be sure rotor does not bind. If rotor binds, tap rear of rotor light-  
ly with punch as for motor disassembly.  
Assemble motor assembly to housing and assemble throttle  
to housing using thread adhesive on threads and tighten se-  
curely.  
_
_
ASSEMBLY  
Pack bearing (46109) with ARO 33153 grease and assemble  
to end plate (46108), with shielded side out.  
MOTOR ASSEMBLY 46112( )  
(ATP60)  
37738 WRENCH (FURNISHED WITH TOOL)  
OPTIONAL FILTER ASSEMBLY (1/4)  
(ATP56)  
5
 
TYPICAL CROSS SECTION OF TOOL  
(ATP57)  
DIMENSIONAL DATA  
(ATP58)  
6
 
M10  
15  
7
 
PN 49999247  
04607560  
 

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