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6
General Electrical Cautions
This machine should be grounded in accordance with the
National Electrical Code and local codes and ordinances.
This work should be done by a qualified electrician. The
machine should be grounded to protect the user from
electrical shock.
Wire sizes
Caution: for circuits which are far away from the electrical
service box, the wire size must be increased in order to
deliver ample voltage to the motor. To minimize power
losses and to prevent motor overheating and burnout, the
use of wire sizes for branch circuits or electrical extension
cords according to the following table is recommended:
Conductor length
240 volt lines 120 volt lines
No. 14
No. 14
No. 12
No. 14
No. 12
No. 8
0-50 feet
50-100 feet
Over 100 feet
AWG (American wire gauge) number
7. Before grinding, always allow the motor to come up to
operating speed, then check the grinding disc for wobble,
runout, or any unbalanced condition. If the disc is not
operating accurately and smoothly, immediately stop the
motor and make repairs before attempting any grinding
operations.
8. Abrasive discs must be stored in a controlled environ-
ment area. Relative humidity should be 35% to 50% and
the temperature should be between 60 and 80 degrees
Farenheit. Failure to do so could cause premature disc
failure.
9. Examine the face of the grinding disc carefully.
Excessive grinding which wears down to the backing
material can tearing of the disc. Never use a disc which
shows backing, nicks or cuts on the surface or edge or
damage due to creasing or poor handling.
10. When installing a new disc, be certain the disc is
accurately centered on the drive wheel. Failure to do so
could cause a serious unbalanced condition.
11. Always present the workpiece to the wheel while
resting the workpiece firmly on the table. Failure to do so
could result in damage to the workpiece or throwing of
the workpiece off the wheel.
12. Safety shoes which comply with ANSI Z41.1 shall be
worn. See Figure C.
13. Personal hearing protection such as ear plugs or ear
muffs shall be used to protect against the effect of noise
exposure. See Figure D.
Figure A Figure B
Figure D
Figure C
Safety requirements for
abrasive grinding machines
Abrasive grinding can be hazardous to operators and
bystanders. Grinding sparks, chips and dust particles
thrown off by the grinding disc can cause serious injury
by contact or inhalation. To avoid such injuries you must
comply with the following safety requirements:
1. CAUTION: The gap between the abrasive surface and
table edge must not exceed 3/16". If it does, loosen the
four motor mount bolts and move the motor forward to
minimize gap.
2. Always wear protective eyewear when operating
machinery. Eye wear shall be impact resistant, protective
safety glasses with side shields which comply with ANSI
Z87.1. Use of eye wear which does not comply with ANSI
Z87.1 specifications could result in severe injury from
breakage of eye protection. See Figure A, below.
3. Wear leather safety gloves, arm guards, leather
aprons and safety shoes.
4. A dust collection system is recommended, Operator
shall also wear a dust mask at all times. See Figure B,
below.
5. Additional precautions may be necessary for grinding
materials which are flammable or have other hazardous
properties. You should always consult the manufacturer
of such materials for instructions on grinding and
handling.
6. Do not force or jamb the workpiece into the grinding
disc.
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