In automobile manufacturing, in order to ensure the high-speed production and quality assurance of each component, batch testing is carried out with the help of high-precision measuring instruments. The CMM is the most widely used measuring instrument in the automotive industry, which can meet most of the measurement needs with high precision and high efficiency.

The CMM is guided by air bearings, so that there is no friction and wear between the guide rails, and long-term performance uniformity can be maintained. The high-pressure gas enters between the working surface and the guide surface through the small air holes in the air bearing, forming a uniform air gap. The normal working air gap of the air bearing is between 3 and 10 μm.

Coordinate Measuring Machines (CMMs) enable tolerance testing of increasingly demanding parts.