The Measurement of a Grinding Wheel
Diameter of grinding wheel x Thickness of grinding wheel x size of arbor hole -
We will reference the AA Abrasives #60397 - 12x2x1-1/4 Pedestal Grinding Wheel T-1 Vitrified A36 - from our Vitrified Bonded Grinding Wheel Series.
12=Diameter x 2=Thickness x
1-1/4=Arbor Hole
*Note that
the arbor hole can be bushed down meaning a bushing may be inserted in the
arbor hole to reduce the size of the arbor hole.
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| Pedestal Grinding Wheel |
What does the rest of the description
mean after the size?
T-1 means the grinding wheel is flat. This is also
referred to as a Type 1 Grinding Wheel or a straight toolroom wheel;
Vitrified is the bonding of grinding wheel;
A36 - A means
it is an aluminum oxide grinding wheel and the 36 means the grinding wheel is composed of a medium grain size also
known as grit. See the grain size chart
below.
A/O also means aluminum oxide;
RPM is the
Revolutions Per Minute or Maximum Operating Speed - not all specifications will show this. The
tool, the grinding wheel and application must be in agreement to ensure safe
operation.
Grinding Wheel Specification Sheet
Grain Size/Grit:
Coarse: 8, 10, 12, 14, 18, 20, 24
Medium: 30, 36, 46, 54, 60
Fine: 80, 100, 120, 150, 180
Grade:
Soft: B, D, E, F, G, H
Med:
I, J, K, L, M, N
Hard: O, P, Q, R, S, T
Bond:
V- Vitrified
B- Resin
B2: Resin Bonded
BF: Reinforced Resin
Grain Types:
A- Dark Aluminum Oxide – Most common
grain. Used for Heavy Duty General Purpose
AS3- 20% Ceramic Aluminum Oxide, 30%
Pink Grain, 50% White Grain. Excellent for form and corner holding.
AZ- Blue Aluminum Oxide- Grinds fast
with excellent cool cutting action and requires minimal dressing.
RA- Red Aluminum Oxide (Ruby)- Harder
grain and sharper than PA & AZ wheels good for steels with high level
chromium
PA- Pink Aluminum Oxide- General
Purpose Grain that is tough but friable. Tool Room sharpening applications.
WA- White Aluminum Oxide- Highly
friable grain for fast cool cutting. Good for light grinding on all steels
particularly on tool and die steels.
GC- Green Silicon Carbide- very
friable use for carbide grinding applications.
AA Abrasives carries its own line of Grinding Wheels. We are also an authorized distributor of Norton Grinding Wheels.
Visit our webstore to view our full line of abrasives and industrial power tools.
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| aaabrasives.com |
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