Usually in the centerless grinder for grinding cylindrical workpiece. When grinding, the workpiece is not top-centering and support, but placed between the wheel and guide wheel, pallet beneath its support, guide wheel is rotated by. When the wheel axis and the wheel axis of the guide is adjusted to 1 ° ~ 6 ° oblique when workpiece can be axially while rotating longitudinally automatic feed motion, which is called through the ground (Figure 4). Only be used for grinding cylindrical grinding through the cylinder. When using plunge centerless grinding, required to adjust the wire guide shaft is parallel to the axis of the grinding wheel, the workpiece reinforced concrete cutting discs is not supported on the carrier for axial movement relative to the guide wheel for a continuous grinding wheel infeed. Plunge centerless grinding processability forming surface. Centerless grinding, internal grinding can also be used when the workpiece is supported on rollers or cylindrical bearing block centering ring with eccentric driven electromagnetic suction workpiece rotation, grinding wheel inserted into the hole, then the outer circle as positioning benchmarks, to ensure concentric inner circle and outer circle. Centerless grinding used in the grinding bearing ring on the bearing ring channel dedicated grinder.......