1. The outer circle grinding workpiece does not hit the center hole in two lines does not need the thimble to support the workpiece. Due to the indefinite centering of the workpiece, the grinding allowance is relatively reduced.

      2. External grinding can not grind workpieces with grooves. When grinding workpieces with holes, the position of the axis of the hole cannot be corrected, and the coaxiality of the workpiece is low.the position of the axis of the hole cannot be corrected, and the coaxiality of the workpiece is low.

      3. Prisoners can only process workpieces that can be rolled on a roller in general circumstances, and are particularly suitable for grinding thin-walled components such as sleeves. Milling parts because the part is its own outer circle as a positioning benchmark. Therefore, the original uranium error between internal and external factors cannot be corrected.the original uranium error between internal and external factors cannot be corrected.the original uranium error between internal and external factors cannot be corrected.the original uranium error between internal and external factors cannot be corrected.

      4. The centerless grinding maneuvering time coincides with the time of loading and unloading. It is easy to realize the automation of the grinding process and the production efficiency is high.

      5. In the centerless grinding process, the position change of the center of the workpiece depends on the original error before the workpiece grinding, the rigidity of the process system, is the grinding amount and other process parameters (center height of the workpiece, pallet angle, etc.);

      6 The stability and uniformity of centerless grinding workpiece movement depends on the machine tool drive chain, workpiece shape, weight, guide wheel and support material, surface morphology, grinding star and other process parameters.

      7. The adjustment time of the centerless grinding machine tool is long, and the technical requirements for an adjusting the machine tool are also high, and it is not suitable for single-piece and small-batch production.and it is not suitable for single-piece and small-batch production.