Abrasive size shape and position of some flaws

Abrasives standards relating to the position tolerance checking parallelism and concentricity, technical guidance document specifies the shape of the tolerance checking roundness, flatness, and cylindrical. Industry, said more than five items as "five degrees." Indeed wheel hole shop roll  and the vertical plane directly affect the use of grinding wheels, should be strictly controlled, so abrasive geometric tolerance checks generally have six.
1. Flatness is the ideal abrasive for an arbitrary plane roughness of the plane. If not good, easy card when chucking broken wheel or cause Obscure, rotation rupture. 2. Roundness is abrasive cylindrical surface, spherical and conical surfaces are ideal for cross-sectional shape of the edge degree of error circle, such as poor will increase the abrasive sanding belt  amount of dressing. 3. Cylindrical refers in two coaxial cylindrical grinding cylindrical inner diameter of the difference between the maximum and minimum. Will also increase the amount of good dressing, affecting the balance wheel.
4. Parallelism refers to the abrasive surface across the face of its inclusion on the basis of both ends of the plane is grinding disc  not parallel to the degree where the ends are not parallel to the surface, the wheel rotates to generate yaw.
5. Concentricity is a grinding wheel or with holes in the center of the concentric circles on the basis of the degree of deviation. Wheel will produce bad beating, affecting quality of the workpiece, but also cause wheel breakage.
6. Verticality refers to the axis of cylindrical grinding holes or vertical extent on the plane, bad, wheel rotation will produce end swing around, affecting the quality of the workpiece and the grinding wheel strength, it tends to break the wheel card.
7. Runout tolerance, for some wheels, such as cutting and grinding with a data sheet wheel, depressed center grinding wheel, grinding wheel, etc., but also for national standard circular runout measurements.