800
.
923
.
6255
•
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.
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70
Conventional
Grinding
Wheels
32A
46
I
8
V
BE
Aluminum
Oxide
23A
25A
32A
32AC
(BLEND)
38a
48A
53A
55A
57A
U57A
64A
86A
90A
Fabcut
Gemini
Ceramic
Aluminum
Oxide
3SGP
3SGR
5SG
SG
SXG
NORZON
Plus
(Blend)
Silicon
Carbide
37C
39C
Zirconia
Alumina
4NZ
4ZF
5ZF
AZ
(Blend)
Charger
(Blend)
NZ
NZC
(BLEND)
NZIII
NZIV
NORZON
Coarse
12
14
16
20
24
Medium
30
36
46
54
60
70
Fine
80
90
100
120
150
220
Soft
D
E
F
G
H
Medium
I
J
K
L
M
O
P
Hard
Q
R
S
T
U
V
Y
Z
Relative
Grain
Spacing
Dense
2
4
5
6
8
12
16
19
25
Open
28
Resin
=
B
Shellac
=
E
Plastic
=
P
Rubber
=
R
Vitrified
=
V
Designates
a
Variation
or
Modification
to
bond
.
Abrasive
Grit
Size
Grade
Structure
Bond
Type
Norton
Symbol
Coated
Abrasives
R
9
8
1
A
=
Light
Paper
(A
-
D
wts
.
)
excluding
waterproof
1
=
Aluminum
Oxide
1
=
Openkote
Designates
different
F
=
Fibre
2
=
Aluminum
Oxide,
Other
2
=
Closekote
products
within
the
H
=
Heavy
Paper
/
Resin
Bond
(E
and
F
wts
.
)
4
=
Silicon
Carbide
3
=
Openkote
same
product
group
.
K
=
Cloth
/
Glue
Bond
(J
and
X
wts
.
)
5
=
Garnet
4
=
Closekote
Q
=
Various
(e
.
g
.
Screen
-
Bak
and
Polyester
film)
6
=
Crocus
&
Emery
5
=
Openkote
R
=
Cloth
/
Resin
Bond
(H,
J,
X
and
Y
wts
.
)
8
=
Zirconia
Alumina
6
=
Closekote
T
=
Waterproof
Paper
(A,C
wts
.
)
9
=
Norton
SG
-
7
=
Openkote
Ceramic
Aluminum
Oxide
8
=
Closekote
9
=
Openkote
0
=
Closekote
Backing
/
Bond
Principal
Abrasive
Coating
Random
Safe
operating
practices
must
be
part
of
every
grinding
wheel
user’s
operation
.
The
greatest
efficiency
and
lowest
over
-
all
abrasive
cost
can
be
realized
only
if
proven
care
and
use
techniques
become
standard
practice
.
•
Be
sure
to
read
any
safety
material/
guidelines
provided
with
the
abrasive
product
.
•
Always
check
the
wheel
for
cracks
or
damage
before
use
.
•
Before
mounting
the
wheel,
use
a
tachometer
to
measure
the
spindle
speed
.
•
Ensure
the
mounting
flanges,
backplate
or
adapter
supplied
by
the
machine
manufacturer
are
used
and
kept
in
good
condition
.
ANSI
Safety
Requirement
B7
.
1
provides
wheel
mounting
require
-
ments
.
Check
mounting
flanges
for
equal
and
correct
diameter
and
use
blotters
when
supplied
.
•
When
not
using
the
wheel,
store
the
wheel
in
its
original
packing
materials
.
This
protects
the
wheel
from
chips
and
cracking,
as
well
as
provides
easy
identi
-
fication
of
the
wheel
.
For
more
information
on
product
safety,
ask
your
DGI
Supply
for
these
publications:
•
“Primer
on
Grinding
Wheel
Safety”
(form
474)
•
Portable
Grinding
Safety
(form
1406)
•
ANSI
B7
.
1
“Safety
Requirements
for
the
Use,
Care
and
Protection
of
Abrasive
Wheels”
•
Federal
Hazard
Communication
Standard
29
CFR
1910
.
95,
1910
.
132,
1910
.
133,
1910
.
134,
1910
.
138
and
1910
.
1200
.
•
Material
Safety
Data
Sheets
•
Norton
Safety
Videos
•
Other
applicable
regulations
•
Always
mount,
true
and
dress
the
wheel
in
conformance
with
the
guidelines
published
in
the
ANSI
Safety
Requirements
B7
.
1
.
•
Ensure
the
correct
wheel
guard
is
in
place
before
starting
the
wheel
.
Allow
the
wheel
to
come
up
to
full
operating
speed
before
starting
to
grind
for
a
minimum
of
one
minute,
and
stand
out
of
the
plane
of
rotation
.
•
NEVER
use
a
high
speed
air
sander
as
a
portable
grinder
.
•
NEVER
exceed
the
maximum
operating
speed
marked
on
the
wheel
being
used
.
The
following
formula
may
be
