Bearing is an important component in contemporary mechanical equipment. Its main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy. Bearings are important basic components of all kinds of mechanical equipment, and their accuracy, performance, life and reliability play a decisive role in the accuracy, performance, life and reliability of the host.

With the improvement of bearing users' pursuit of bearing quality, bearing manufacturers have also proposed the roundness, curvature radius, shape deviation, and roughness of parts and components. High-precision detection requirements, in order to pursue high precision and high reliability. This puts forward higher requirements for precision measuring equipment such as profilometers and roughness meters. Zhongtu Instrument SJ57 series profiler has a wide range of applications in the bearing industry and is well-known. SJ5700 Profiler SJ5718 Small Profiler Case Analysis Double-groove bearing: its main test radii R1 and R2, center distance, since R1 is downhill and R2 is uphill during the test process, which requires the instrument to be very consistent in uphill and downhill measurement, After measuring the bearing for several times, turn it 180° and measure it several times again, and see the change of its value to know whether the instrument can complete the measurement requirements, and the measurement results of the case fully meet the requirements. Measurement of groove shape deviation inside and outside the bearing: In the bearing industry, the curvature radius and groove shape deviation of the inner and outer grooves are the key parameters of the quality of the bearing finished product. The measurement with the SJ57 series profiler not only has good accuracy, high efficiency, but also has a wide range. Bearing outer channel: measurement of the spherical diameter of the bearing outer channel, after the bearing is installed, move the table to find the lowest point on the left side of the channel, and then find the lowest point on the right side, that is, the two straight lines are required to be parallel to the guide rail, and then To measure the spherical diameter of the channel, the spherical diameter of the large bearing can also be measured, and another channel side rod can be replaced to measure the spherical diameter of the inner and outer channels. Profiler