Centerless grinding machine is employed for infixed grinding and thru feed grinding to confirm accuracy, high productivity in workpieces with diameters between one millimeter and fifty millimeter. Automatic loading and unloading attachment is convenient to work and scale back price. The most specifications are as follows: Infixed Grinding , Thru feed Grinding , The grinding and control wheel spindles are manufactured from top quality alloy steel (SNCM-439), and treated through: normalized, tempered, carburized hardening, sub-zero treatment, then follows the exactness grinding method which might greatly enhances spindle life and stability guaranteeing deformation free performance.