Black Fused Alumina

Black Fused Alumina 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.

Chemical specifications By weight %
Grit 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#w40 64.0Min 10.0Min 7.0Min 1.5-3.0

Available sizes: F14-F500.

8#: 2800 ~ 2360 um 46#: 425 ~ 355 um
10#: 2360 ~ 2000 um 54#: 355 ~ 300 um
12#: 2000 ~ 1700 um 60#: 300 ~ 250 um
14#: 1700 ~ 1400 um 70#: 250 ~ 212 um
16#; 1400 ~ 1180 um 80#; 212 ~ 180 um
20#: 1180 ~ 1000 um 90#: 180 ~ 150 um
22#: 1000 ~ 850 um 100#: 150 ~ 125 um
24#: 850 ~ 710 um 120#: 125 ~ 106 um
30#: 710 ~ 600 um 150#: 106 ~ 75 um
36#: 600 ~ 500 um 180#: 90 ~ 63 um
40#: 500 ~ 425 um 220#: 75 ~ 53 um

Packing: 25kgs/bag.