Superabrasive Wheel Shapes
This system is designed to describe the shape of abrasive wheels using a series of numbers and letters.
6
Core
Shape
A
Shape of
Abrasive Section
2
Location of
Abrasive Section
C
Modification (Drilled
and CSK) Hole
Typical Example of Superabrasive
Wheel Cross Section and Designations
Position 1
Position 2
Position 3
Position 4
Number designating core shape
Letter designating shape of
abrasive section
Number designating the location of
the abrasive section of the core
Letter designating a modification
1— Periphery
B — Drill and Counterbore
1
2
A
G
AH
H
B
J
C
2
— Side
3
9
CH
D
L
LL
3 — Both Sides
4 — Inside Bevel or Arc
M
5 — Outside Bevel or Arc
11
H — Plain Hole
M — Holes Plain and Threaded
C
6
— Drill and Countersink
DD
P — Relieved One Side
R — Relieved Two Sides
Relieved Sides and
S — Segmental
Slotted
Q
6 — Part of Periphery
E
QQ
EE
U
F
V
T — Threaded Holes
Q — Abrasive Inserted
12
7 — Part of Side
V — Abrasive Inverted
14
8 — Throughout
Y — Abrasive Inserted and Inverted
15
FF
Y
See American National Standard Specifications for Shapes and Sizes of Diamond or CBN
Abrasive Products B74.3, developed by Unified Abrasive Manufacturing Association.
Available from American National Standards Institute, Inc., (212) 642-4900.
9 — Corner
Superabrasive Wheel Shapes with Abrasive Placement (Solid black area indicates abrasive placement)
1A1
6A2H
1A1R
6A9
1A2
9A3
1A1
1A6Q
9A3H
1A8
11A2
1E1
11V4
1A1R
1E9
11V9
1EE1
12A2
6A2C
1F1
12V4
1FF1
12V9
11V9
1FF6Y
14A1
1V1
15A2
2A2T
15A29
4A2P
15V4
1V1 (45° angle)
6A2
15V9
1V1 (10° angle)
W8 (1A8 on a shank)
6A2C
3
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