Black aluminum oxide supplied by our principles, which 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, time pieces, 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.
Range of grits chemical composition (% by weight)
al2o3 sio2 fe2o3 tio2
24#-100# 77.00min 11.0 min 5.0 1.5-3.5
120#-200# 75-81 9-12 4-6 2-3
240#-280# 64.0 min 10.0 min 7.0 min 1.5-3.0
available grain sizes
grit no. micron grit no. micron grit no. micron
10 2360 ~ 2000 30 710 ~ 600 80 212 ~180
12 2000 ~ 1700 36 600 ~ 500 90 180 ~ 150
14 1700 ~ 1400 40 500 ~ 425 100 150 ~ 125
16 1400 ~ 1180 46 425 ~ 355 120 125 ~105
20 1180 ~ 1000 54 355 ~ 300 150 106 ~75
22 100 ~ 850 60 300 ~ 250 180 90 ~63
24 850 ~ 710 70 250 ~ 212 220 75 ~ 53

Black aluminum oxide supplied by our principles, which 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, time pieces, 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.
Range of grits chemical composition (% by weight)
al2o3 sio2 fe2o3 tio2
24#-100# 77.00min 11.0 min 5.0 1.5-3.5
120#-200# 75-81 9-12 4-6 2-3
240#-280# 64.0 min 10.0 min 7.0 min 1.5-3.0
available grain sizes
grit no. micron grit no. micron grit no. micron
10 2360 ~ 2000 30 710 ~ 600 80 212 ~180
12 2000 ~ 1700 36 600 ~ 500 90 180 ~ 150
14 1700 ~ 1400 40 500 ~ 425 100 150 ~ 125
16 1400 ~ 1180 46 425 ~ 355 120 125 ~105
20 1180 ~ 1000 54 355 ~ 300 150 106 ~75
22 100 ~ 850 60 300 ~ 250 180 90 ~63
24 850 ~ 710 70 250 ~ 212 220 75 ~ 53