ABRASIVES are natural minerals or of artificial origin crushed to grains and sorted to sizes, bonded to hardness or grades, structured to porous and shaved to sizes.
BONDED abrasives are made by incorporating abrasives grains - Corundum ( Al2 O3 ), CBN ( Cubic Boron Nitride ), Carborundum ( Black/Green Silicon Carbide ). . . . into a matrix, which can be inorganic- vitrified, magnesite,..... bonds and organic - resinoid, rubber,......
Inorganic: - vitrified bonds are multi-component mixtures of finely crushed materials including refractory clay, boron glass, talc, quartz, feldspar, etc. The soluble glass, dextrine and the likes are added for increasing the plasticity. Vitrified bonds are porous inbuilt with high refractory properties, water resistance, chemical resistance & comparatively high strength. Thus, vitrified bonded wheels are less prone to loading, are free-cutting and suitable for wet grinding. The vitrified bonds are brittle and thus sensitive to impacts. The vitrified bonds are divided into fusing ( vitreous - glass ) & sintering ( porcelain - type ). Synthetic corundum tools are made with fusing bonds, while silicon carbide tools are made with sintered bonds.
- magnesite bond is formed by a mixture of caustic magnesite and magnesium chloride forming an air-hardening paste. The feature of this bond is low heat generation & wear out fast & have a weak profile thus have a limited use in dry grindings.
Organic: - resinoid bond is the most popular among organic bonds. It is made of artificial resin in liquid or powder form ( bakelite ). This bond not only provides higher grinding and cutting speeds but also offers high strength. Under harsh condition the cutting temperatures of 300 degree C and higher, the bond burns out and releases the grains. The feature of the resinoid bond is low heat resistance and are sensitive to alkali solutions thus generally used without coolants.
-rubber bonds are elastic bonds thus used both for preliminarily grinding and for polishing. With the increase in pressure during application the grains penetrate deep into the bond thus decreasing the cutting depth and giving a better surface finish. Rubber bonded abrasive tools are less porous generate more heat on the work piece. The rubber bond softens and burns out at a temperature of 150 degree C. The feature of rubber bonded wheels is that it can be manufactured in low thickness as tenths of a millimeter which other bonds cannot achieve.
The hardness, or grade, of abrasive tool
Quality Policy / Processes
We are known for producing & marketing Industrial Abrasives only the best in quality and reliability. Industrial Abrasive products include Bonded, Coated, Super abrasives ( Diamond & CBN ), Non- Woven products & super finishing range.
The Company in order to attain excellence, follows its quality policy to the core. We at Malhotra Impex commit ourselves to put in our best endeavor to achieve total customer satisfaction by following the quality policy :
Sourcing of high quality base Materials
Production of Quality Abrasives
Adhering to delivery schedules
Continuous up gradation
To keep check on quality of products, Malhotra Impex has Quality Assurance department. The department keeps a close watch, right from the procurement of raw material to the distribution.
Aim / Vision / Mission
Malhotra Impex's mission is to always attach great importance to the quality of its products with the motto " QUALITY FIRST & CLIENT ABOVE ALL". We are dedicated to provide "BEST IN QUALITY AT REASONABLE PRICES". We at Malhotra Impex are committed to serve the industry with latest technical growth in the arena of abrasives. The customers demand is our top guideline & the customer satisfaction is our aim. Our products are tailor made & reasonably price to the specific requirements & needs of the individual jobs in the industrial fields.