A centerless grinder is generally considered to be the only machine that can grind planes. The development trend of flat grinding is steering molding, step, cut in, rapid jitter, and 3D surface grinding. It can be said that centerless grinder is the most potential type of machine tool in grinding machine. China's flat grinding manufacturers should jump out of the traditional thinking of plane grinding and go to the train of thought of non plane grinding, such as curve or contour, to form our own characteristics of technology and products. Most small centerless grinding machines are grinding with high speed rotating grinding wheels. The few are processed with other grinding tools and free abrasives such as oil stone, sand belt, etc., such as honing machine, superfinishing machine tool, abrasive belt grinding machine, grinding machine and polishing machine. Small centerless grinder can process high hardness materials, such as hardened steel, hard alloy, etc., and also can process brittle materials, such as glass and granite. Grinder can be used for grinding with high accuracy and small surface roughness, and also for efficient grinding, such as strong grinding.

In 30s eighteenth Century, in order to adapt to the hardened processing of parts, such as clocks, bicycles, sewing machines, and firearms, the United Kingdom, Germany and the United States developed a grinder with natural abrasive grinding wheels. These small and careless grinders are made of machine tools such as lathe and planer, such as lathe, planer and so on. They are simple in structure, low in stiffness, and easy to produce vibration during grinding. The development trend of centerless grinder is steering molding, step, cut in, rapid jitter, and 3D surface grinding. It can be said that grinder is one of the most potential evolution machines in grinding machines. Our grinders should jump out of the traditional thinking of plane grinding and go to the train of thought of non plane grinding, such as curve or contour, to form our own characteristic technology and products. Basically represents the current international machine tool technology development trend and level of foreign manufacturing technology exhibition not long ago.

In the development of centerless grinder, its working schema has undergone a tortuous process. The initial centerless grinder is a single wheel type. The grinding wheel faces or circumferentially grind. The support and continuous contact of the workpiece depend on the stopper, guide plate and spring. It was not until 1915 that the pallets and the guide wheels began. With the appearance of guide wheel and supporting plate, the machine design and grinding process of centerless grinder have entered a new historical period. Because of historical reasons, the industrial layout of more than 1000 enterprises in the grindless tool industry in our country has converged in the domestic industrial layout, resulting in the production amount is not small and the low level of duplication of construction is serious; the large, small and complete phenomenon exists widely, and the enterprises have strong self-supporting consciousness, long production cycle, high cost, and the whole machine performance and performance. Reliability is not guaranteed and market demand is slow.

With the growing diversification and diversification of our country's economy, the careless grinders have also written a lot of brilliant mechanical triumphs in the history of China's machinery industry. In fact, according to the statistics of our country, the unintentional grinder has shown a trend of great change in the last three years, but it has increased but will also decrease. As a whole, the trend of growth shows that the market in China has become more and more short of demand now, so it is said that in the future, there will be a big fluctuation in the market of unintentional mould in China, but in a certain practice, his production and sales will not fall.