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The grinder models listed in the model identification table above arefurnished with collet assembly 41753-3 (1/4”capacity) as standard equipment and are intended for
use with mounted wheels and shall not be used with othertype grinding wheels unless a proper wheel guard, recommended by the grinder manufacturer, is attached to
thegrinder. See ”Grinding Wheel Mounting Instructions”, page 5. Other size collet inserts
(1/8” or 3/16”) or other collet assemblies listed on page 9 can
be
furnished
the above listed models.
The above listed grinder models that are furnished with optional arbor assembly 36934, must also be equipped with wheel guard 44451 (2” maximum wheel diameter).
Arbor assembly 36934 is for
USe
with type 1 non-threaded grinding wheels only. See “Grinding Wheel Mounting Instructions”, page 5 and “Accessories”, page 9.
The above listed grinder models that are furnished with optional cone wheel adapter 37292-( ) are for use with types 16, 17, 18, 18R and 19 cone and plug wheels and
shall not be used with other type grinding wheels unless a proper wheel guard, recommended by the grinder manufacturer, is attached to the grinder. See “Grinding
Wheel Mounting Instructions”, page 5 and “Accessories” section, page 9.
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 venti-
lated areas. Adjacent personnel shall be protected from grinding sparks and
wheel fragments by protective barriers.
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 compe-
tent authorized personnel, using a good reliable tachometer, to assure that the
Starting and Stopping. Before starting a grinder, the operator shall make sure that
maximum tool speed is lower than manufacturers rated speed for the wheel to be
no one is in the unguarded plane of wheel rotation. Upon mounting a new wheel,
used. A speed check shall never be made with grinding wheel on the grinder.
grinder shall be run at operating speed with the safety guard in place or in a pro-
tected enclosure for at least one minute before applying the wheel to the work.
Grinders shall not be operated at a speed exceeding its rated speed.
Check speed and balance of wheel.
If a wire brush should ever be used with this tool; insure the speed rating of the
Before a grinder is put down, the throttle shall be released and the wheel shall
brush is greater than the speed of the tool the brush is to be used with and insure
come to a stop. Tool rests, hangers or balancers are recommended.
the brush conforms to applicable safety standards. Be certain the brush is com-
patible with mounting of the tool. Always use a wheel guard.
Use only wheels with adequate speed ratings. The maximum operating speed Use recommended guard.
SAFETY GUIDE FOR PORTABLE GRINDER USE
Some
of the more
common causes
of wheel
breakage are: Improper
mounting of the wheels, improper speeds, abusive operation and careless handling.
DO
and
DON’T
Do always handle and store wheels in a careful manner (handle with due
regard, grinding wheels are fragile).
Grinding wheels shall be stored in protective racks or containers and pro-
tected from moisture and temperature extremes.
Do visually inspect all wheels before mounting for possible damage In
transit.
Do check maximum operating speed established for the wheel against
grinders speed.
Do check mounting flanges for correct size and design (see “Accessorles”
page 11.
Do use mounting blotters supplied with wheels where applicable.
Do be sure tool is kept in first class operating condition.
Do always use a guard covering at least 1/2 of the grinding wheel.
Do allow newly mounted wheels, with guard in place, to run at operating
speed for at least one minute before grinding.
Do always wear safety glasses or goggles when grinding.
Do always observe all safety rules when operating or handling portable
grinders.
Don’t use a wheel that has been dropped.
Don’t force a wheel onto the spindle or alter the size of the mounting. If the
wheel won’t fit the spindle, get one that will.
Don’t use mounting flanges on which the bearing surfaces are not clean
and flat,
Don’t tighten the mounting nut excessively. lighten only sufficiently to
drive the wheel and prevent slippage.
Don’t grind on the side of the wheel unless wheel is specifically designed
for that purpose.
Don’t start the grinder until the wheel guard is in place.
Don’t jam the wheel Into the work.
Don’t stand directly in front of a grinding wheel whenever a grinder Is
started.
Don’t grind material for which the wheel is not designed.
Grinding In grooves may be hazardous.
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