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CGW's advanced abrasive technology based on years of experience and ongoing research insures
our unconditionally commitment to innovation and to the quality and safety of our products.
Bonded abrasives are made by incorporating abrasives grains into a matrix, which can
be resin and fillers or vitreous materials. Usually, such abrasives contain porosity which
helps to control the thermal aspects of the process.
Coated abrasives are abrasive grains incorporated or cloth backing.
The formulation and choice of additives are usually a closely guarded secret of the manufacturer. In order to choose the right wheel material and structure several quest ions must be asked:
Each axis represents 100% of one component with the opposite side corresponding to 0% and intermediate percentages
represented by the fractional distance from the side to the axis. Actual wheels compositions do not cover the whole composition range
represented by the phase diagram but are restricted to a limit range by technological and practical factors.
Abrasive grains are the tools of the grinding and cutting process. In the past abrasives grains were derived from natural minerals,
such as emery, quartz sand, and so on, today, the industry is almost entirely dependant upon synthetic grains, which are far more
consistent and cost-effective. Some physical properties of the most important abrasives materials are Summarized in Table 1.
Table 1: Physical properties of main abrasive grains
Melting Point (C)
Knoop Hardness kg/mm2
Pink/red (3% Cr)
Production of pores
Nut shell, Wax, Naphthalene
Glass balls, Spherical aluminum oxide
Active grinding effects
Cryolite, Chlorides, Iron Pyrites, Phosphates
Calcium Oxide, Magnesium Oxide