Black Fused Alumina (abrasive black aluminium oxide) has good features as high hardness, strong tenacity,better bonding ability and hydrophilicity, giving less heat, good self-sharpening, smooth surface and high finish. It’s suitable for polishing various spare parts such as:bicycles,sewing-machine,hard metal tools,medical apparatus, timepieces,glass products and stone grinding.It’s also the right material for making abrasive tools: fiber- reinforced cutting wheels, grinding wheels, sand cloth, paper and paste.
|
Grit No. |
Micron |
Grit No. |
Micron |
Grit No. |
Micron |
Grit No. |
Micron |
|
12 |
2000 ~ 1700 |
24 |
850 ~ 710 |
54 |
355 ~ 300 |
100 |
150 ~ 125 |
|
14 |
1700 ~ 1400 |
30 |
710 ~ 600 |
60 |
300 ~ 250 |
120 |
125 ~ 106 |
|
16 |
1400 ~ 1180 |
36 |
600 ~ 500 |
70 |
250 ~ 212 |
150 |
106 ~ 75 |
|
20 |
1180 ~ 1000 |
40 |
500 ~ 425 |
80 |
212 ~ 180 |
180 |
90 ~ 63 |
|
22 |
1000 ~ 850 |
46 |
425 ~ 355 |
90 |
180 ~ 150 |
220 |
75~53 |
|
Chemical Composition (% by weight)
|
||||
|
Range of Grits
|
Chemical Composition
|
|||
|
Al2O3
|
SiO2
|
Fe2O3
|
TiO2
|
|
|
24#-100#
|
77.00min
|
11.0min
|
5.0min
|
1.5-3.5
|
|
120#-200#
|
75-81 | 9-12 |
4-6
|
2-3 |
|
240#-280#
|
64.0min |
10.0min
|
7.0min
|
1.5-3.0 |
