Abrasive tools on ceramic bond
“ZAI” JSC is a manufacturer with rich experience and a worldwide recognized quality of over 18 000 types of ceramic abrasive tools on ceramic bond with diameter up to 900 mm., both mass and specialized use.
The ceramic abrasive tools are produced according to the customers’ requirements and depending on the type of material to be treated.
Tools made by ZAI contain modern, hard abrasive materials.
- Aluminum oxide (synthetic corundum) – αAl2O3
Aluminum oxide in different variations is the most frequently used abrasive material.
It is melted from bauxite or aluminium oxide at temp. over 2000ºC in electric furnaces.
- 1A – Normal aluminium oxide (brown)
It is prepared from bauxite. Contains 96% Al2O3~3% titanium dioxide (TiO2) and 1-2% other admixtures.
It is the most resistant synthetic corundum and is characterized by its high ductility. It is used for cutting-off and rough grinding of low-alloy steels, stainless steels, cast iron, especially for high rates of stock removal.
- 8A – Friable aluminium oxide (white)
It is prepared from pure aluminium oxide. It is the purest synthetic corundum and contains over 90 % Al2O3. It is characterized by its high hardness and brittleness. It is used for precision grinding, e.g. surface and cylindrical grinding, sharpening of cutting tools.
- 9A – Chromium aluminium oxide (pink)
It is prepared from aluminium oxide with an addition of up to several percent of chromium oxide. It is characterized by its high hardness and higher strength in comparison with white aloxite. It is used for precision grinding of high-alloy steels, sharpening of cutting tools.
- ZrA – Zirconia aluminium oxide
It is prepared from aluminium oxide or bauxite with an addition of zirconium dioxide. It is characterized by the highest microhardness and mechanic strength among other aloxities. It is used for highly efficient grinding of cast iron, grinding of steel semiproducts using high pressures.
- Silicon carbide (carborundum) – SiC.
Prepared from high-silica sand of high purity and petroleum coke in resistance furnaces using the synthesis process. The second, after diamond, in respect to hardness.
- 2C – Green silicon carbide
High purity silicon carbide is green and contains 99% SiC min. It is used for grinding of sintered carbides, ceramics, stones, sharpening of cutting tools with sintered carbide inserts.
- 1C – Black silicon carbide
Contains 98% SiC and more amount of admixtures. Similarly to 99C, it is used for grinding of sintered carbides, ceramic materials, concrete, stone, rough grinding of castings (fettling) made of hard and fragile white cast iron and for cutting of concrete, stone and white cast iron.