(Cage) Outer Diameter Position Gauge

The cage outer diameter center position gauge is a comparative measurement jig that verifies the accuracy of the outer diameter center of a bearing cage relative to a reference position. Cages are thin and flexible, and are significantly affected by the window shape and forming and processing stresses, making it easy for the outer diameter center to deviate from the inner diameter center or reference plane. This deviation can lead to uneven loads during assembly, shaking during rotation, increased noise and vibration, friction marks, and reduced service life, making early detection crucial during the process.

The measurement principle is based on reference fixation and detection of outer diameter center deviation. The cage is secured to the jig's reference plane and positioning elements to maintain a constant position. Then, a measuring probe contacting the outer diameter is used to measure the center displacement of the outer diameter with a gauge. Typically, the gauge is rotated while the outer diameter is continuously contacted to determine the extent of the gauge variation, or repeated measurements at a specific angle are performed to determine the direction and magnitude of the deviation.

In practice, a zero point is established using an approved reference or reference value. The inspected product is then mounted under the same conditions and judged to pass or fail based on whether the displayed value falls within the tolerance range. The goal is to quickly identify the outer diameter center to reduce the risk of cages shifting to one side during rotation, as well as assembly and functional defects.

For example, a cage with a misaligned outer diameter center may occasionally generate intermittent noise during assembly, or exhibit abnormal friction marks on the outer periphery of the cage. This jig detects the outer diameter center deviation during the process, thereby reducing defects.