Compared with internal grinding cylindrical grinding, machining conditions are relatively poor, internal grinding has the following features:

(1) wheel diameter is limited by processing aperture, the smaller diameter. Wheel blunt easily, requiring constant trimming and replacement, increasing the stone cutting wheels auxiliary time, reducing productivity.
(2) wheel diameter is small, even if the wheel speed of up to tens of thousands of revolutions per minute, to reach the grinding wheel peripheral speed of 25 ~ 30m / s is very difficult, due to the low ground speed, so the grinding efficiency is lower than the cylindrical grinding .
Diameter (3) of the wheel spindle is small, and the longer the overhang, the difference in rigidity, bending and vibration prone grinding, thus affecting the machining accuracy and surface roughness. Internal grinding accuracy up IT8 ~ IT6, the surface roughness Ra value of up to 0.8 ~ 0.2μm.
(4) cutting fluid is not easy to enter into the grinding zone, compared to exclude debris cylindrical grinding difficult.
Although internal grinding cylindrical grinding conditions than the poor, it is still a commonly used method of finishing holes. Especially suitable hardened, holes discontinuous surface (keyway or spline grooves with a hole) and a short length of precision hole. Grinding not only ensure the straightness of the hole position precision and the dimensional metal flap discs accuracy of the axial and surface quality, but also the progress of a pore itself; with the same grinding wheel, grinding holes of different diameters can, flexibility. Internal grinding can grind cylindrical hole (through holes, blind holes, opportunities holes), tapered bore hole and end face and so on.