Superabrasive Wheel Shapes - 3M

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

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