Woodstock M1104 - Manual (Page 14)

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M1104, M1105, M1106 Heavy-Duty Bench Grinder
OPERATIONS
Wheel Selection
Aluminum oxide and silicon carbide wheels are
marked in a somewhat uniform manner by all the
major manufacturers. Understanding these markings
will help you understand the capabilities of various
wheels. Always refer to the manufacturer’s grinding
recommendations when selecting a wheel for your
project.
The basic format for wheel numbering is:
The most common abrasive types used are A for
Aluminum Oxide and C for Silicon Carbide, and
occasionally SG for seeded gel. The prefix is the
manufacturer’s designation for a particular type.
The grit size is a number referring to the size of the
abrasive grain in the wheel. The lower the number
the coarser the wheel—10 is a very coarse wheel for
roughing and 220 is usually the upper range for fine
finish work.
Grade is an indication of the hardness of the wheel, with
A being softest to Z the hardest.
Bond type refers to the type of bonding material used to
hold the abrasive material. Most general purpose wheels
will have a V indicating vitrified clay is used, providing a
high strength and good porosity. The other most common
is B for resin where synthetic resins are used. These are
used to grind cemented carbide and ceramic materials.
There may be other numbers inserted that have
meaning for a particular type of wheel. Refer to
the manufacturer’s technical data for a complete
explanation.
DO NOT use this grinder with a liquid
cooling system required for wet grind-
ing wheel operations. Ignoring this
warning can lead to electrocution.
Prefix�Type Abrasive�Type Grit�Type Grade Bond�Type
36 A 60 L V