abrasive grinding wheel under loads shedding difficulty level.

The cutting tool is a grinding wheel, which consists of many small and hard abrasive particles and adhesive bonding agent made of the porous body. Directly responsible abrasive cutting work concrete blades  must be sharp and has high hardness, heat resistance and a toughness. Commonly used abrasive alumina (also known as corundum) and silicon carbide two kinds. Alumina-based abrasive, high hardness, good toughness, suitable for grinding steel material. Silicon carbide abrasive hardness is higher and more sharp, good thermal conductivity, but more brittle, suitable for grinding cast iron and carbide.
The same abrasive wheel, due to their different thickness, the surface roughness after the workpiece and the machining efficiency is not the same, for the coarse grains coarse, abrasive for grinding small, the more coarse abrasives, the smaller the grain size number.
From the bonded abrasive binders role. Commonly used ceramic binder, followed by resin binding agent. Binding agents are selected  core drill bits from different materials, the impact grinding corrosion resistance, strength, heat resistance and toughness.
Abrasive grains bonded more firmly, the more difficult from the wheel fell off, they said grinding wheel hardness, the hardness of the grinding wheel surface is abrasive grinding wheel under loads shedding difficulty level. Off easily called soft, otherwise known as hard. The  diamond blade hardness and abrasive grinding wheel hardness are two different concepts. Surface of the workpiece to be ground is relatively soft, abrasive edge (corners) for easy to wear, this time can be abrasive to use longer, more solid bond that is optional wheel (high hardness wheel). Conversely, low hardness grinding wheel for high hardness of the workpiece.
Wheel in high-speed conditions of work, in order to ensure safety, should be checked before installation, there should be no cracks and other defects; wheel in order to work smoothly, balancing test should be carried out before use.
Grinding work after a certain time, the surface of the gap may be clogged debris, blunt abrasive acute angle, the original geometry will be distorted. Therefore, the ability to be cut and trimmed in order to restore the correct geometry. Wheel dresser diamond pen required.