What does it mean BFA F60?
BFA,in the abrasive field,it means Brown Fused Alumina, is a type of electrofused artificial corundum made by process fusing bauxite and other elements in electric arc furnaces. Fusion under very high temperature makes the materials in the furnaces liquid materials. The materials are then cooled down and become crystal forms with high hardness and density. So Brown Fused Alumina is also called Brown Corundum. Brown Fused Alumina widely used in refractory products, unshaped refractories, sandblasting media, grinding media, abrasives grains, etc.
About F60,it is the size of the BFA,if you want to know the exact size of BFA F60,pls study the following JIS Standard:
| Grit | 1 | 2 | 3 | 3 and 4 | 3, 4, and 5 | Q6max, % | |||||
| W1, mm (mkm) | Q1, % | W2, mm (mkm) | Q2max, % | W3, mm (mkm) | Q3min, % | W4, mm (mkm) | Q3+Q4min, % | W5, mm (mkm) | Q3+Q4+Q5min, % | ||
| F8 | 4,00 | 0 | 2,80 | 20 | 2,36 | 45 | 2,00 | 70 | 1,70 | * | 3 |
| F10 | 3,35 | 0 | 2,36 | 20 | 2,00 | 45 | 1,70 | 70 | 1,40 | * | 3 |
| F12 | 2,80 | 0 | 2,00 | 20 | 1,70 | 45 | 1,40 | 70 | 1,18 | * | 3 |
| F14 | 2,36 | 0 | 1,70 | 20 | 1,40 | 45 | 1,18 | 70 | 1,00 | * | 3 |
| F16 | 2,00 | 0 | 1,40 | 20 | 1,18 | 45 | 1,00 | 70 | (850) | * | 3 |
| F20 | 1,70 | 0 | 1,18 | 20 | 1,00 | 45 | (850) | 70 | (710) | * | 3 |
| F22 | 1,40 | 0 | 1,00 | 20 | (850) | 45 | (710) | 70 | (600) | * | 3 |
| F24 | 1,18 | 0 | (850) | 25 | (710) | 45 | (600) | 65 | (500) | * | 3 |
| F30 | 1,00 | 0 | (710) | 25 | (600) | 45 | (500) | 65 | (425) | * | 3 |
| F36 | (850) | 0 | (600) | 25 | (500) | 45 | (425) | 65 | (355) | * | 3 |
| F40 | (710) | 0 | (500) | 30 | (425) | 40 | (355) | 65 | (300) | * | 3 |
| F46 | (600) | 0 | (425) | 30 | (355) | 40 | (300) | 65 | (250) | * | 3 |
| F54 | (500) | 0 | (355) | 30 | (300) | 40 | (250) | 65 | (212) | * | 3 |
| F60 | (425) | 0 | (300) | 30 | (250) | 40 | (212) | 65 | (180) | * | 3 |
| F70 | (355) | 0 | (250) | 25 | (212) | 40 | (180) | 65 | (150) | * | 3 |
| F80 | (300) | 0 | (212) | 25 | (180) | 40 | (150) | 65 | (125) | * | 3 |
| F90 | (250) | 0 | (180) | 20 | (150) | 40 | (125) | 65 | (106) | * | 3 |
| F100 | (212) | 0 | (150) | 20 | (125) | 40 | (106) | 65 | ( 75) | * | 3 |
| F120 | (180) | 0 | (125) | 20 | (106) | 40 | ( 90) | 65 | ( 63) | * | 3 |
| F150 | (150) | 0 | (106) | 15 | ( 75) | 40 | ( 63) | 65 | ( 45) | * | 3 |
| F180 | (125) | 0 | ( 90) | 15 | ( 75) | * | ( 63) | 40 | ( 53) | 65 | * |
| F220 | (106) | 0 | ( 75) | 15 | ( 63) | * | ( 53) | 40 | ( 45) | 60 | * |