2
MN903
Caution:
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.
Electrical Instructions
Single phase grinders are rated dual voltage. Some single phase grinders are equipped with cord and grounding type
plug for 115 volts. To use with a different voltage, see instructions provided to make wiring changes. All attachment
plugs and any receptacles must be replaced with devices rated for the voltage for which the grinder is reconnected.
Table 1 indicates the minimum wire size. Be sure to comply with NEC and local wiring codes.
Three phase grinders are normally dual voltage and must be wired for the proper voltage and rotation direction
(connections are inside conduit box). Connect phase sequence so that the wheel moves down toward top surface of tool
rest as viewed from front of grinder. Wheel must rotate toward tool rest. Be sure all electrical connections are secured
and properly insulated. For your safety, be certain grinder is properly grounded.
Grinding
Face
Grinder
Wheel
D
W
H
