Millwright Level 2 Bearings Practice Test 2026 – Complete Exam Prep

In bearing identification, the code markings provide essential information about the dimensions of the bearing. The correct choice highlights that the markings correspond to three specific measurements: the outside diameter, bore (inner diameter), and bearing width, all expressed in millimeters.

Understanding these dimensions is crucial for selecting the right bearing for an application, as each of these parameters affects the bearing's performance, load capacity, and suitability for specific operating conditions. When the outside diameter, bore, and bearing width are known, it allows for accurate matching of bearings to their corresponding housings and shafts, ensuring optimal functioning in machinery.

This comprehensive identification through code markings ensures that a millwright can effectively specify the correct bearing for repair or new installations, thereby minimizing downtime and preventing fitting errors that could lead to mechanical failures.