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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 in-
creased 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 accord-
ing to the following table is recommended:
240 volt lines 120 volt lines
No. 14
No. 14
No. 12
No. 14
No. 12
No. 8
AWG (American wire gauge) number
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 sanding operations.
7. Abrasive discs must be stored in a controlled
environment 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.
8. Examine the face of the sanding disc carefully.
Excessive sanding 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.
9. 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.
10. 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.
11. Safety shoes which comply with ANSI Z41.1 shall
be worn. See Figure C.
12. 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
Abrasive sanding can be hazardous to operators and
bystanders. Sanding sparks, chips and dust particles
thrown off by the sanding disc can cause serious
injury by contact or inhalation. To avoid injuries you
must comply with the following safety requirements:
1. 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 protec-
tion. See Figure A, below.
2. Wear leather safety gloves, arm guards, leather
aprons and safety shoes.
3. A dust collection system is recommended,
Operator shall also wear a dust mask at all times.
See Figure B, below.
4. Additional precautions may be necessary for
sanding materials which are flammable or have other
hazardous properties. You should always consult the
manufacturer of such materials for instructions on
sanding and handling.
5. Do not force or jamb the workpiece into the
sanding disc.
6. Before sanding, always allow the motor to come
up to operating speed, then check the sanding disc
Conductor length
0-50 feet
50-100 feet
Over 100 feet
Safety Requirements for Abrasive Sanding Machines