The press can be divided into ordinary abrasive abrasive (corundum and silicon carbide, etc.) and natural abrasive grinding wheels and superabrasive (diamond and cubic boron nitride grinding wheels, etc.) wheel.


cutting grinding blades is 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 wheel easy to fall off, do not burn the workpiece, but the wheel consumed faster.
We speak of the soft wheel, the wheel does not mean that such a soft crystal particles, but to combine the strength of soft sand, easier to fall off, so that when the sand is grinding a little too sharp not to fall off, under the new sharp Continue grinding sand, so keep a sharp abrasive, then a hard material is also a softness.
If we use the head-on approach, there will be two-meet, refused to give the situation serious slippage between the wheel and the material appears, no one way who will wear no more.
Soft material with a hard grinding wheel, grinding wheel with a soft flexible material is not no, is too wasted effort, soft material and hard material greater than the friction coefficient, the soft sand on the surface of the wheel to fall off more easily, but also sharp sand when he lost, no give full play to the ability, the wheel will soon be rebuilt, there will be even wheel wear faster than the soft material situation, or not moving phenomenon occurs mill, then grinding efficiency is greatly reduced, so then we should use the combination of strong Wheel of hard