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Vitrified Bonded Wheels

It is used for grinding, lapping, honing and polishing. The characteristics of a grinding wheel are determined by type of abrasive grain, grade, bond, structure, shape and dimensions.
Abrasive Type Selection
Abrasie Type Abrasive Code Color Applications
Brown Fused Alumina A Brown Carbon steel,alloy steel, malleable iron, hardened bronze.
White Fused Alumina WA White Alloy steel,high speed steel,high carbon steel, quencher steel, gear grinding and thin walled workpieces.
Pink Fused Alumina PA Red For form grinding,precision grinding of cutters,measuring tools,surface finish grinding.
Monocrystalline Fused Alumina SA White Khaki Suitable for great hardness and toughness material like stainless steel,high vanadium-high speed steel, Ti-Alloy, etc.
Microcrystalline Fused Alumina MA Brown For heavy pressure grinding,lens grinding.
Black Silicon Carbide C Black Cast iron,glass,jadeware,non-metal material.
Green Silicon Carbide GC Green Fragile and hard alloy, glass, stone, jadeward.
Zirconia Alumina ZA Grey Heavy pressure grinding.
Vitrified Bonded Grinding Wheel Series
Shape Code Setion Chart Dimension (mm)
China GB 84 Standard China GB 94 Standard Diameter (D) Thickness (T) Hole Diameter (H)
P 1
3-1100 0.5-400 1-480
PH 1-F
100-600 6-100 75-305
PSX1 4
100-750 8-100 16-305
PSX2 1-N
500-900 25-200 203-305
PSX3 7-N
250-900 50-300 75-305
PDX1 1-C
125-350 8-25 32-127
PDX2 3
75-750 6-100 13-305
PDA 5
10-900 10-150 3-305
PSA 7
200-1100 50-400 75-350
N 2
90-600 80-150 W7.5-100
B 6
40-300 25-150 13-150
BW 11
40-300 25-150 13-150
D1 12a
75-800 8-35 13-400
D3 12b
225-450 18-29 40-127
Comparison Chart For Hardness Grade
China GB2484-2495-84 Russia America Norton Universal Co. Japan
D,E,F BM1 BM2 A B C D E F G H E F G H E F G H I J K
G M1
H M2
J M3
K CM1 I J K L
L CM2
M C1 I J K L M N O P M N O P L M N O
N C2
P CT1 Q R S T U V W X Y Z Q R S P Q R S
Q CT2
R CT3
S T1
T T2
Y BT1 T U V W X Y Z T U V W X Y Z
BT2
BT1
BT2
China Hardness Grade
Hard Grade Grade Very Soft Soft Medium Soft (MS) Medium Medirm Hard (MH) Hard Very Hard
Sub-Grade VerySoft Soft 1 Soft2 Soft3 MS1 MS2 Medium1 Medium2 MH1 MH2 MH3 Hard1 Hard2 Very Hard
Code A,B,C D,E,F G H J K L M N P Q R S T Y
Suggestions Application against Grain Size Difference
Grit Number Suggestion Applications
F4,F5,F6,F7,F8,F10,F12,F14,F16, F20,F22,F24,F30 Initial finishing and Cutting
F36,F40,F46,F54 Normal purpose semi-final finishing
F60,F70,F80,F90,F100 Normal purpose final finishing
F120,F150,F180,F220,F230,F240, F280,F320,F360,F400 Precision Grind, Honing and Tread Grinding
F500,F600,F800,F1000,F1200 Mirror finish grinding, precision grinding.