1. Types

Grains used for grinding and polishing tools can be broadly divided into (1) general grain and (2) extra-aカジノシークレット.
The materials used can be categorized (1) as alumina and silicon carbide, and (2) as diamond and cubic boron nitride, with further sub-categories according to differences in properties and structure. The grain categories here are coded according to JIS standards.

Features of aカジノシークレット

aカジノシークレット A

This is the most usable aカジノシークレット and it is used for the cut off wheel, free grinding wheel and for grinding general metallic material that strength tensile is high and it is comparatively extended since its toughness is high.

aカジノシークレット WA

Since the toughness of aカジノシークレット WA is less than the aカジノシークレット A and hardness is high, the aカジノシークレット itself is crushed during grinding work and sharp edges are newly and continuously made. As a result, this is suitable to light grinding for high strength tensile quenched steel, special steel, etc.

aカジノシークレット GA

Though the chemical composition of aカジノシークレット is the same as the abrasive A, this is suitable to the rough grinding of high strength tensile quenched steel, special steel, etc.

aカジノシークレット PA

This is the pink aカジノシークレット made by adding a little quantity of chromic oxide. Since the toughness is adequately adjusted, it is effective for preventing burn marks and suitable to tool grinding.

aカジノシークレット SA

This is the aカジノシークレット that releasing the boundary of crystal after hydrated collapse individually separates crystal. The toughness is top ranking among A-system aカジノシークレットs for precision grinding. Consequently, this is suitable for grinding the intricate materials of stainless steel, super heat-resistant steel, etc., and cast iron, various quenched steels, etc., at a high efficiency rate.

aカジノシークレット KA

This aカジノシークレット contains titanium oxide more than A-acid grain and the toughness is high. Thus, it is suitable for free grinding and heavy load grinding of steel.

aカジノシークレット RG

This is the most complex oxide aカジノシークレット having strong and microstructure dendrite crystal which is made by melting and cooling under special condition after mixing zirconia of about 25% to alumina. Thus, it is suitable to remove flaw or scratch on steel billet and rolled steel of special steels except stainless steels by the super heavy grinding.

aカジノシークレット 6A

This is the sintered aカジノシークレット of column type. Since the toughness is extremely high though hardness is low, it is suitable to remove flaw scratch on steel billet and rolled steel of stainless steels by the super heavy grinding.

aカジノシークレット VA

This is the aカジノシークレット sintering the high purity alumina microstructure crystal in column type. The toughness is slightly lower even though it is more harder than aカジノシークレットs 6A and RG. Therefore, the aカジノシークレットs bite into hard material by heavy load grinding, thus improving efficiency of grinding.

aカジノシークレット HF

This is the aカジノシークレット mixing the zirconia of about 25% as well as aカジノシークレット RG. Since grain shape is sharper than the aカジノシークレット RG, it displays an excellent performance for deburring of cast iron and free grinding of steels.

aカジノシークレット HN

This is the abrasive grain mixing zirconia of about 40%. Since it has unique friability that occurs for anisotropic crystal, it displays an excellent performance faカジノシークレットight grinding to work with the grinder such as portable grinder, offset grinder, etc.

aカジノシークレット C

This aカジノシークレット is harder than A-system aカジノシークレット and the toughness is low. It is suitable for grinding a soft and less-extension material and a hard easily broken material.

aカジノシークレット GC

This is as hard as the aカジノシークレット C, but its toughness is lower than that of aカジノシークレット C. Since each grain from is very sharp, it is suitable for grinding the crustaceous materials of non-ferrous metals and nonferrous materials for carbide, stone materials, etc., and the soft materials for aluminum, rubber, urethane, etc.

Mixing aカジノシークレット

aカジノシークレット made together with Cardner Co., associated

79A, 80A, 81A, 82A, 83A, 84A, 86A, 91A

Diamond aカジノシークレット

The diamond abrasive grain is divided into two (i.e. natural diamond and composite diamond). This is the hardest material in the world that knoop hardness is 7000 ~ 8000. It is suitable for grinding the crustaceous materials such as the nonferrous materials and non-ferrous metals for carbide, cermet, ceramics, glass, ferrite, stone, refractory materials, etc. However, this diamond abrasive grain is unsuitable faカジノシークレットess carbon content of general steels since the abrasive grain is dipped because carbon that is the constituent of diamond abrasive grain will disperse into iron at a high temperature. Also, since it is weak for heat, oxidation occurs at 600 ~ 700℃ into air and its hardness is lost.

aカジノシークレット CBN

This is the cubic boron nitride aカジノシークレット and its hardness is next to that of diamond since Knoop hardness is 4700. CBN does not react with steel chemically since it differs from the diamond. Since temperature converting to soften hexagonal metal is high as 1400℃, it is suitable for grinding the quenched steel.

2. Grain size

(1) Grain size of grains for grinding wheels

1. Coarse particle grain size distribution

2. Fine particulate and sedimentation test method for general polishing (units: μm)

3. Fine particulate and dispersal test method for precision polishing (units: μm)

(2) Grain size of abrasives for abrasive cloth and sandpaper

1. Coarse particle grain size distribution

2. Fine particulate (P240–P1200) and dispersal test method (units: μm)

3. Fine particulate (P1500–P2500) and dispersal test method (units: μm)

(3) Grain Size of diamond and aカジノシークレット CBN