Instruction Manual
Section Four
GENERAL OPERATION INSTRUCTIONS
I. SAFETY PRECAUTIONS
A. ALWAYS WEAR SAFETY CLASSES or an eye shield when operating a grind-
ing machine.
B ALWAYS USE A WHEEL GUARD AND BELT GUARD. Machines are pro-
vided with wheel guards of the correct size and necessary mounting brackets.
Consult Part III of this section and general set-up photos in this manual on
how to attach these to the machines.
C. Mounting Wheels
1. Check wheel R.P.M. charts on the machine or Part III, pages 14, 15 of this
section for the correct or maximum safe speed for the size and type of
wheel being used. Do not exceed this speed or the speed marked on the
wheel or its blotter. The R.P.M. listed is the maximum safe speed for a
given new wheel diameter.
2. Inspect all grinding wheels prior to mounting. Use the following check for
cracks of vitrified bond wheels: Hold the wheel by a small shaft through
its hole, and then tap the edge with a non-metallic object. An undamaged
wheel will sound a clear metallic ring. Check resinoid bond wheels and
other types of wheel bonds by visual inspection.
3. Never alter the hole in the wheel or force the wheel on the spindle.
4. Use one clean, smooth blotter on each side of the wheel under each flange.
5. Tighten the arbor nut only enough to hold the wheel firmly.
6. Stand back and out of plane of the wheel when first starting the grinding
spindle (WHEELHEAD MOTOR). Allow the motor to operate for about
a minute prior to grinding.
7. Special caution is needed when grinding on the side of the wheel. Wheels
with flat sides may have sufficient side "run-out" to necessitate truing the
side with a dressing stick. A slightly hollow recess to within 1/16 inch of the
periphery of the wheel is recommended to limit the amount of side thrust
on the wheel. Use saucer wheels whenever possible for side grinding.
8. Store wheels in a safe place (FREE FROM EXTREMES OF HUMIDITY
AND TEMPERATURE) near the grinding machine.
9. See Part II in this section for procedures on mounting, truing, and dress-
ing wheels. NOTE: Wheel arbor clamping flanges must be the same diam-
eter inside and outside. The wheel collet or arbor O.D. should vary with
the wheel diameter. Safety codes recommend a diameter equal to not less
than ⅜ of the diameter of the wheel.
D. We recommend a dust collect system for use with dry grinding.
E. Rings, wrist watches, or loose long-sleeved shirts are hazardous items to wear
during grinding operations,
II. ELECTRICAL CONTROLS
Before starting machine, learn the location and function of each electrical switch.
(REFER TO NUMBERED POSITIONS IN PHOTO 4.)
A. Wheelhead and Spindle Motor: Machines with standard toggle switches have
the switch located at point (1). This switch, located on the top of the motor
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