2
MN903
Always use guard and eyeshield.
Operating the grinder without the guard and eyeshield or with damaged guard
and eyeshield must not be attempted because of the hazard this introduces.
Do not overtighten wheel nut
. A damaged grinding wheel can disintegrate in all directions. An overtightened wheel
nut can stress the grinding wheel and cause it to disintegrate during operation. Wheel nut should be tightened
just enough to prevent grinding wheel from slipping on shaft when grinding. Use only flanges furnished with this
grinder. The flanges furnished with the grinder are designed to grip the grinding wheel without introducing excessive
stresses in the wheel.
Replace a cracked or chipped wheel immediately
. A cracked wheel will disintegrate when operated, causing a
hazard to operator and nearby personnel. If a wheel has a chip or crack on any surface, do not use it.
Maintain 1/8 or less clearance between tool rest and wheel
. This clearance is necessary to prevent the work
piece from becoming wedged between the wheel and tool rest and restricting nip areas in the machine.
Grind on grinding face (periphery) of wheels only
. Grinding on side of wheel weakens the wheel and may cause
wheel breakage. Also, grinding on the side of wheel introduces an additional hazard due to absence of a tool rest.
Use wheels rated at or over rated grinder RPM shown in the following table.
Wheel Size
No Load RPM
(on Nameplate)
D Diameter (inches)
W Width (inches)
H Arbor Diameter (inches)
6”
3/4”
1/2”
1800
6”
3/4”
1/2”
3600
7”
1”
5/8”
1800
7”
1”
5/8”
3600
8”
1”
3/4”
1800
8”
1”
3/4”
3600
10”
1”
7/8”
1800
12”
2”
1- 1/4”
1800
14”
3”
1- 1/4”
1800
On-Of f Switch
Grinding Face
Guard Cover
Tool Rest Support
Tool Rest
Spark Arrestor
Exhaust Port
Eyeshield
Spark Arrestor
Eyeshield
Exhaust Port
Grinding Face
Tool Rest
Wheel Flange
Installation
When you receive your unit, there are several things you should do immediately.
1. Observe the condition of the shipping container and report any damage immediately to the commercial carrier
that delivered the product.
2. Verify that the part number you received is the same as the part number listed on your purchase order.
WARNING:
When starting a grinder for the first time, or after installing a replacement grinding wheel, it is most important
that the operator stand aside for at least one minute of rotation at full speed. This is the correct practice
since grinding wheels can disintegrate if they have received damage during shipping or handling.
3. Mount grinder on solid bench. The grinder must be securely bolted to a rigid mounting surface. If a pedestal is
used, first bolt pedestal securely to floor and then bolt grinder to pedestal.
4. Check grinder nameplate to make certain the rating is correct for the power source, voltage and frequency. See
electrical and grounding instructions for electrical service connection.
5. Adjust spark arrestor for approximately 1/16” clearance between it and grinding wheel. Maintain 1/8” or less
clearance between spark arrestor and wheel as wheel wears.
6. Adjust angle of tool rest on support to desired position and tighten nut securely. Adjust tool rest support on
guard to attain approximately 1/16” clearance between tool rest and grinding wheel and tighten nut securely.
Maintain 1/8” or less clearance between tool rest and wheel.
7. Adjust eyeshield to position aligning center of eyeshield in line of sight to tool rest.
Grinding
Face
Grinder
Wheel
D
W
H
