Centerless grinder is a type of grinder that does not require the use of the axis positioning of the workpiece for grinding. It mainly consists of three mechanisms: grinding wheel, adjustment wheel, and workpiece support. The grinding wheel actually performs the grinding work, the adjustment wheel controls the rotation of the workpiece, and controls the feed speed of the workpiece. As for the workpiece support, it supports the workpiece during grinding. There are several ways to cooperate with these three components, except for stopping grinding, and the principle is the same.

Compared with ordinary grinders, the performance of the centerless grinder mechanism has the following characteristics

1. Continuous processing, no need for tool return, short replication time for workpiece clamping, high productivity,

2. The positioning mechanism of the bracket and guide wheel has better support rigidity than the top and center frame mechanisms of ordinary cylindrical grinders, with a larger cutting amount, and is conducive to the processing of slender shaft workpieces, making it easy to achieve high-speed grinding and strong grinding.

3. The workpiece of the centerless grinder is positioned on the positioning mechanism by the outer circle, and the grinding amount is the margin on the diameter of the workpiece. Therefore, the wear of the grinding wheel, the compensation of the feed mechanism, and the repeated positioning accuracy error of the cutting mechanism have an impact on the diameter and size accuracy of the part. It is only half of a regular cylindrical grinder, does not require a center hole, and is easy to achieve automatic loading and unloading.

4. The wide grinding wheel centerless grinder has a pass through mechanism that can increase the machining allowance each time. When cutting in, it can perform sequential shape grinding or multi wheel grinding on complex surfaces, with high productivity and wide applicability

5. The centerless grinder does not have a mechanism that guarantees the relative positional accuracy (coaxiality, perpendicularity, etc.) between the ground surface and the non ground surface. When grinding the outer surface with intermittent circumferential directions, the roundness is poor,

6. Grinding surfaces can easily produce odd numbered edge roundness, and when it is large, it often creates the illusion that the measured size is smaller than the maximum physical size, which affects assembly quality and work performance

7. The adjustment of the machine tool is complex and time-consuming. The height of the bracket, distance and relevant process parameters need to be adjusted by punching every time the workpiece with different diameters is replaced. Therefore, adjusting the technology is difficult and not suitable for small batch and single piece production