4
MN905
Installation Continued
Figure 1 Wheel Mounting Hole Locations
4 holes for
5/16 - 18
4 holes for
1/4 - 20
1.25” Diameter Hub
Flat Head
Machine Screws
Mushroom Head
Machine Screws
3.25” B.C.
7.
Carefully inspect each wheel for damage. If damaged, remove and discard the wheel
and install a new wheel. Never use a defective wheel.
8.
Install the Arbor/Wheel Mounting Screw Covers:
Tool grinders are supplied with covers for the arbor nut and wheel mounting screws (see
Figure 2). There are two sizes. Smaller diameter covers are for plate mounted wheels
with 4–inch diameter center. Larger diameter covers are for diamond wheels with 4
1/2–inch diameter center. Carbide and diamond wheel tool grinders are supplied less
grinding wheels. After installing the desired grinding wheels, tighten wheel mounting
screws and install arbor/wheel mounting screw covers.
a.
Select the arbor/wheel mounting screw cover that is correct for the wheel center
diameter.
b.
Center the inner hub of the cover over the shaft arbor nut.
c.
Using a light mallet (rawhide or plastic head type), lightly tap the cover over the
arbor nut. The cover should seat firmly on the arbor nut with no cocking or
wobbling around the outside diameter of the cover.
d.
To remove the arbor/wheel mounting screw covers, use a flat blade tool such as a
straight blade screwdriver to lift the edge of the cover. Go around the complete
circumference of the cover, lifting gently around the edge until it comes loose from
the arbor nut.
e.
Remove the wheel mounting screws to replace the wheel.
Never loosen or remove the shaft arbor nut.
f.
Replace the wheel and wheel mounting screws. Follow the instructions supplied
with the new grinding wheel. Install the arbor/wheel mounting screw cover removed
in steps “a” through “c”.
Figure 2 Covers for Arbor Nut and Wheel Mounting Screws
B
1.200
A
Part Number
“A” Dimension “B” Dimension
G9AP1008A01
3.875
0.850
G9AP1008A02
4.425
0.625
