Grinding wheel rotation strength and static unbalance

  Grinding wheel under the centrifugal force when the ability to resist rupture. As the wheel compressive or tensile strength than the flexural strength is low, typically only the wheel cutting tools strength is mainly determined by the size of the performance and the amount of binding agent, molding density and calcination temperature. When the high-speed rotary wheel because the tangent along the aperture produces stress reaches a critical tensile strength of its own, the wheel will break, when the rotation speed of the wheel is called rupture velocity. Minimum burst speed should  Polycrystalline diamond  operating speed of grinding wheel 1.8 to 2 times. To ensure the safety wheel, wheel rotation test must pass. Test speed shall be permitted maximum operating speed of grinding wheel is 1.5 to 1.6 times. For ease of use, wheel marks only the maximum permissible operating speed (rev / min or m / sec). Wheel must be used with safety guards. The actual rotational axis of the wheel and its axis of rotation through the center of mass deviation from parallel state called static unbalance wheel. This is usually due wheel uneven density, both ends of the hole and the surface is not parallel or coaxial cylindrical deviation has caused. It will cause the machine vibration, shaft and bearing wear faster, uneven wheel wear and workpiece surface quality deterioration. Therefore, the wheel diameter greater than 200 mm or 200 mm outside diameter less than the wheel, but there are special requirements, must be static balance test. Wheel flange installed before use after hours must the weight balance.