Choosing the optimal combination of abrasive grain, grain size, hardness, structure and bond is decisive for maximum grinding performance!

We have access to all abrasive materials available on the market and combine these with our wide bandwidth of different bond types developed by us. With our decades of experience, you can trust us to find the right composition for your specific application.

We do not recommend the lowest cost variant, but a solution that ensures successful results. With our own composition system, we can modify any composition to suit individual requirements.

Designations
(according to international standard DN ISO 12413)

Conventional abrasives		Grains		Degree of hardness		Structure		Bonds
10A/ 12A	Regular aluminium oxide	10, 12, 14, 16	very coarse	C, D	extremely soft	3-5	dense	V (vitrified)
18A	Regular aluminium oxide/ zirconium aluminium oxide	20, 24, 30, 36	coarse	E, F	very soft	6-8	medium	V10
19A	Regular aluminium oxide/ zirconium aluminium oxide	46, 54, 60, 70, 80	medium	G, H, I, J	soft	9-10	open	V20
20A	Half special fused alu- minium oxide	90 and fine	fine	K, L, M	medium hard	11-20	very open	V25
30A	Special fused aluminium oxide, white	240 and fine	very fine	N, O, P, Q	hard			V28 blue
31A	Regular/ special fused aluminium oxide, white			R, S, T	very hard	..1, ..2	highly porous	V31 orange
40A	Special fused aluminium oxide, pink					..3	medium porous	V341 red
50A	Ruby aluminium oxide							V625 blue
51A, 81A	Mono- crystalline aluminium oxide							V635 blue
517A, 518A	Mono- crystalline/ special fused aluminium oxide							V655 blue
55A	Ruby/mono- crystalline aluminium oxide							V735 blue
60C	Silicon carbide, green
66C, 68C	Silicon carbide, dark							B (resinoid)
3A	Sintered aluminium oxide mixture							BF Fibre reinforced
7..A	Mixture of sintered aluminium oxides
8..A	Mixture of sintered aluminium oxides and special fused aluminium oxides
9..A	Mixture of sintered aluminium oxides and special fused aluminium oxides

Example

Abrasive	Grain	Hardness	Structure	Bond	Remark
517A	54/11	G/H	202	V341	For flat surface grinding of soft and hardened steels
Mixture of monocrystalline and special fused aluminium oxide	Combination of size of the abrasive grain and other sizes	Soft grinding hardness for optimal self-sharpening	Open and highly porous for improved cooling performance	Vitreous bond