What's the difference between centerless grinder and centerless grinder?

Machining external cylindrical surface on ordinary cylindrical grinder and universal cylindrical grinder is centering grinding. According to different grinding movements, center grinding can be divided into longitudinal grinding, transverse grinding, comprehensive grinding and deep grinding. A grinder that grinds the rotating surface of a workpiece by centerless grinding is usually called a centerless cylindrical grinder. On the centerless cylindrical grinder (see figure), the workpiece is not centered and supported by the center, but is placed between the grinding wheel and the guide wheel and supported by the support plate and the guide wheel. The grinding wheel is generally installed at the end of the spindle, and the grinding wheel with a width greater than 250 mm is installed in the middle of the spindle, and the maximum width of the grinding wheel can reach 900 mm The grinding wheel rotates at high speed for grinding, and the guide wheel rotates in the same direction at a slower speed to drive the workpiece to rotate for circumferential feeding. Through grinding, the axial feed is realized by adjusting the slight inclination angle of the guide wheel axis, which is suitable for grinding slender cylindrical workpieces, short shafts without central holes and sleeve-like workpieces. During cutting and grinding, radial feed is realized by the movement of guide wheel frame or grinding wheel frame, which is suitable for grinding workpieces with shoulders or bosses, and workpieces with conical surface, spherical surface or other curves. The centerless grinder has high productivity, and it is easy to realize automation after adding various loading and unloading devices. Most of them are used for mass production and can be operated by unskilled workers. The grinding accuracy of centerless grinder is generally: roundness is 2 microns, dimensional accuracy is 4 microns, and high-precision centerless grinder can reach 0.5 microns and 2 microns respectively. In addition, there are centerless internal grinder and centerless thread grinder.