(Outer ring) Inner diameter position measuring device

The (Outer Race) Inner Diameter Position Gauge is a comparative measurement jig that verifies whether the inner diameter center position (center position) of the outer race is formed correctly relative to the reference. Here, the inner diameter center position does not simply refer to the inner diameter dimension (diameter). It also manages the relationship between the center/axis of the inner diameter and the reference (axial position and center position relative to the reference).

A misalignment of the inner diameter center position can lead to center misalignment during assembly, changes in fit/play, deterioration of rotational accuracy (runout), and changes in track contact patterns. Therefore, it is a key factor in preemptive deviation management during the process.

The measurement principle is to establish a zero point using a sample master (a good/approved product) as the reference point and then read only the deviation. First, the approved product is placed and secured in the jig pocket as the sample master. A dedicated contact (an inner diameter contact pin/ball or centering structure) is brought into contact with the reference point under specified conditions, and a dial gauge (or digital indicator) is set to zero. Afterwards, the Outer Race to be measured is fixed and secured under the same conditions, the gauge displacement (+) / (-) is read, and the deviation of the inner diameter position from the standard is managed as pass/fail or numerical value.