Brief Wheel

Wheel hardness is not abrasive wheel hardness, but a combination of abrasive hardness between. Divided into soft, soft, hard, hard few. Each is divided into several levels. Hard not falling abrasive grinding wheel, grinding swarf under easy to stick on the wheel, causing the surface burns; soft abrasive grinding wheels easy to fall off, do not burn the workpiece, but the wheel consumed faster.
In addition to the hardness of the wheel, the organizational structure was divided tight, in a total of 12 loose, tight structure difficult to heat.
According to what you said, you can then check the wheel speed is not low? Rotational speed of the workpiece is not high?
Wheel hardness of its particle size should be! As can be seen the rough grinding wheel the coarser particle size, appearance can be seen! Numerical models of wheel greater the finer for finishing or polishing off, the softer brittle! Easily damaged.