Workpiece Inspection; Grinding Tips - Grizzly T32459 Owner's Manual

Workpiece
Inspection
Some workpieces are not suitable for grind-
ing on a grinder. Before grinding, inspect all
workpieces for the following:
• Flammable Workpiece: Workpieces with
unstable chemical elements (like magne-
sium) may catch fire or create explosion
hazards when introduced to the heat and
friction of grinding. Be aware of the material
composition of workpieces you intend to use
and avoid grinding different metals and alloys
on the same belt in case two different materi-
als create a dangerous chemical reaction.
Soft Workpiece: Workpieces that are made
•
of aluminum, brass, lead, and other nonfer-
rous metals will load up in the belt. Grinding
plastics, rubber, fiberglass, or other soft
materials can also cause the same problem.
Always use the recommended belt for the
material.
Flexible/Unstable Workpiece: Grinding on
•
the side or the ends of cable, chain, or round
workpieces creates the hazard of workpiece
twist or grab, leading to contact with the belt.
This hazard must be avoided.
Wood Workpiece: Never grind wood on
•
this machine. Wood dust and shavings are
extremely flammable and hot metal sparks
will ignite them. A belt that has been used
to sand wood creates a flame and explosion
hazard when the hot sparks created by grind-
ing metal are introduced.
-20-

Grinding Tips

• Extend the life of the abrasive belt by regular-
ly using an abrasive surface cleaner. Change
a belt when cleaning is no longer effective.
• As a rule-of-thumb, grind with progressively
higher grit numbers. A higher grit will achieve
a finer finish.
• Hold workpiece securely with both hands and
do not wear gloves. Use tool rest and jigs
whenever possible to support workpiece. Do
not force workpiece against belt.
• Never grind magnesium. Once shaved or
powdered, it is highly flammable, and a
magnesium fire is difficult to put out.
• Remember that grinding metal often produc-
es sparks. DO NOT grind metal near flam-
mable materials, and be aware of the area
around the machine the sparks will reach.
• Use full width of belt by moving the workpiece
back-and-forth across the belt.
• Make sure belt guards/covers are secured
during operation.
• The workpiece will get hot as you continue
to grind. Cool the workpiece frequently by
quenching in water or another approved
solution.
• Wear the proper protective clothing. Prepare
for particles to be expelled from the grinder
at high speeds. Wear safety glasses, face
shield, dust mask, earplugs, leather apron,
and heavy leather boots.
Moving belt can cause serious personal
injury if it comes in contact with fingers,
hands, or other body parts. Always support
workpiece against tool rest when grinding if
possible. Use extreme care to provide a safe
distance between belt and any body part.
Model T32459 (Mfd. Since 03/23)