This instrument was first developed in early 1980s, as a special instrument for measuring radius of raceway curvatures of radial ball bearing rings and raceway profile deviations. It won the third class of science & Technology Improvement Prize of the Ministry of Machine Building Industry. In recent years, great improvement has been made on basis of the original model to achieve more easily operation, high reliability and better performance.

Characteristics:

   A polar coordinates/radius comparing measuring method is adopted. The actual profile of measured axial section of raceway is compared with ideal circular segment by precision shafting, movable workbench and high-precision sensor. The high precision measuring results are clearly better than X-Y coordinates direct measuring method.
   Auto-eliminated misalignment and high calculating accuracy greatly improve the measuring accuracy, raise the measuring efficiency, simplify the operation and make adjustment more easily.
   The fine-designed measuring system with precision basic shafting, high-precision sensor, precision workbench and homogeneous no-clearance adjustment assures the high measuring accuracy and reliability.
    The sensor driven by stepper motor is started to collect data automatically, calculation and analysis also auto-run. The measured data and images can be shown simultaneously and printed out. It can be used in workshop check-stations and metrological laboratories.

Usage:

   In grinding or superfinishing process, It can provide reliable information for processing analysis and equipment adjustment by measuring the radius of curvature of ring raceways and raceway profiles deviations.
   It can provide detailed data for quality checking and designing department by final-products bearing sample survey.
To verify the ball strike-off pattern .