RAMANNA 10X20, Instruction And Service Manual, Page: 14 / 18

14
Example
51 A 36 L 5 V
Prefix Abrasive type Abrasive Grain Size Grade Structure Bond type
Manufacturer’s
symbol
(indicating exact
type of abrasive)
(use optional)
A - Aluminium Oxide
WA - White Aluminium Oxide
C - Silicon Carbide
GC - Green Silicon Carbide
Coarse Medium Fine
8 30 70
10 36 80
12 46 90
14 54 100
16 60 120
20 150
24 180
Very Fine > 220
Soft Medium Hard
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Grade Scale
B: Resinoid
BF: Resinoid reinforced
E: Shellac
O: Oxychloride
R: Rubber
RF: Rubber reinforced
S: Silicate
V: Vitrified
Dense 1
2
3
4
5
6
7
8
9
10
11
12
13
Open Etc.