Bosch 1810PS Brochure page 17

Industry Color-Coded System
ANSI Standard Marking System
The following chart is an example of the ANSI standard marking system for identifying Bosch grinding wheels and other bonded abrasives:
A
Primary Grain Used
to Make the Wheel
A = Aluminum oxide
AS = Aluminum oxide
special
C = Silicon carbide
CS = Silicon carbide
special
Z = Aluminum zirconium
Wheel Configurations and Uses
Bonded abrasive wheels have different configurations depending upon the tool on which the wheel is used and the
desired end results. Below are the configurations that a wheel can have.
Type 1A Type 1
(ISO 41)
GRINDING
CUTTING
C
C
B
A A
Straight Straight
Wheel Wheel
Type 1A Bench or
(ISO 41) Type 1
Used at a 90°
Used for edge
angle for grinding at a
cutting only. 50°-90° angle.
No grinding. Not for cutting
applications.
A = Wheel diameter B = Wheel width or thickness C = Wheel bore
Metal /
General Purpose
Concrete /
Masonry
Sample of typical marking: A 30 T-BF
30
Size of the Abrasive Grain
Very coarse 8-12
Coarse 14-24
Medium 30-60
Fine 70-180
Dust fine 200-800
Type 27A Type 27
CUTTING BLENDING
GRINDING
C
B
B
A
Depressed Depressed
Center Center
Wheel Wheel
Type 27A Type 27
To be used at For use on flat
a 90° angle surfaces for
for light weld prep,
cut-off work. usually on bar
stock or angle
iron. Tool best
used at a
30° angle. No
cutting.
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Gr ind in g
Stainless
Pipeline
T
Hardness of Bond
Soft Medium Hard
N P R S
Type 28
GRINDING
C
C
B B
A
A
Saucer-
shaped
Wheel
Type 28
To be used For blending and
stock removal on
for weld
preparation uneven surfaces,
and de-burring best used at a
surfaces. Tool 10° angle. This
usually used at allows user to
a 15° angle, to use one wheel
cover greater
surface area and finishing.
and allow
better visibility.
Wh eel s
Asphalt
Aluminum
BF
Type of Bond Used
B ____ Resinoid
BF __ Resinoid Reinforced
T
Type 29 Type 11
BLENDING GRINDING
GRINDING
C
C
B
A
A
Flexible Flared Cup
Wheel Wheel
Flap Disc
Type 29 Type 11 Steel-
Concrete
Used for removing
excess material
and build-up on
large flat surfaces,
allowing for
maximum surface
for grinding area coverage
– tool used
perpendicular
to work.
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167