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Item 56903
Installing a Non-threaded Grinding
Wheel or Cut-Off Wheel
1. For a Grinding Wheel, it MUST be:
• rated to at least 8500 RPM
• no larger than 5" in diameter
• fitted with a 5/8" round arbor hole
•
from 0.035″ to 0.3″ thick
• a type of grinding wheel suitable for
surface grinding, not edge grinding
• dry and clean
• proven undamaged by inspection and
by the ring-test explained below
For a Cut-Off Wheel, it MUST be:
• rated to at least 8500 RPM
• no larger than 5" in diameter
•
fitted with a 5/8″ round arbor hole
•
from 0.035″ to 0.3″ thick
• suitable for edge grinding, not surface grinding
• dry and clean
• proven undamaged by visual inspection
and by the ring-test explained below
WARNING! TO PREVENT SERIOUS
INJURY: When using a Cut-Off Wheel, a
wheel guard designed specifically for Cut-Off
Wheels (not included) must be installed for
adequate protection if the wheel fails.
WARNING!
TO PREVENT SERIOUS INJURY:
Use only 4.5″ grinding wheels with 4.5″ guards.
Use only 5″ grinding wheels with 5″ guards.
Replacement guards sold separately.
Wrench
Flange Nut
Grinding
Wheel
Outer Flange
Wheel
Guard
Spindle
Spindle Lock
2. Press in and hold the Spindle Lock to
prevent the Spindle from turning.
3. Remove the Flange Nut. Keep the Outer
Flange in position on the Spindle.
4. Closely inspect the Grinding or Cut-Off
Wheel before mounting. Perform a ring-test
on the wheel (unless wheel is smaller than
4" or is an unusual shape) as follows:
a. Suspend wheel using a dowel or
finger through the arbor hole.
Tap
Wheel
Here
45°
45°
45°
45°
45°
45°
45°
45°
Hang
Wheel
from
Dowel
V
V
E
E
R
R
T
T
I
I
C
C
A
A
L
L
C
C
E
E
N
N
T
T
E
E
R
R
b. Tap the flat side of the wheel with a light non-
metallic object, such as a screwdriver handle,
at a point 45° from the vertical center line on
each side of the wheel and 1 – 2 inches from
the edge of the wheel (see Illustration).
c. Rotate the wheel 90° and repeat the test
until the entire wheel has been checked.
d. An undamaged wheel will give a clear
tone. If cracked, there will be a dead
sound and not a clear ring.
5. For wheels with paper gaskets (blotters) or
metal gaskets: Slip the wheel onto the Spindle
with the gasket first. The gasket should be
centered on the wheel and the wheel and
gasket should rest flat against the Flange.
WARNING: To prevent serious injury,
gaskets must be used for all grinding
wheels they are provided with. Gaskets
help prevent grinding wheel damage and
wheel slippage, causes of wheel failure.
Note:
The Outer Flange has a step for improved
stability with thick accessories. Keep this step
on the inside for thick accessories. To allow
proper clamping for thin accessories, flip Outer
Flange so this step is on the outside.
6. Thread the Flange Nut onto the Spindle.
Wrench tighten only enough so that the
wheel is securely held on the spindle.
WARNING: To prevent serious injury, do
not overtighten Flange Nut. Overtightening
can damage the wheel, causing wheel failure.