Bearing Selection Guide

  Selecting the appropriate bearing shield is crucial for ensuring longevity and reliability in your application. A common point of confusion arises between the 626-2RZ and 626-ZZ types. In this post, we break down their differences and provide a real-world example from our technical support team to guide your decision.   Recently, a customer approached us for support on a new transmission project. While the 626 series bearing was confirmed based on shaft size and pump speed, the choice between metal shields (ZZ) and rubber seals (2RZ) remained unclear due to specific operational conditions.   To resolve this, we provided a clear comparison of the two shielding options:   ⓵ 626-ZZ (Metal Shield on Both Sides) Features: Metal shields effectively block larger contaminant...

  In critical machinery, such as electric motors, CNC machine tools, automation equipment, and new energy vehicles, bearings act as the essential "joints" that keep systems running smoothly. However, when selecting bearings, many engineers and procurement managers find themselves confused by the alphanumeric tolerance classes: P0, P6, P5, P4, and P2.   What do these grades actually mean? Do you immediately need a high-precision bearing just because your operating speed is slightly higher? Is installing a P4 bearing in standard equipment a waste of your budget?   As a specialized manufacturer of deep groove ball bearings, Welink Bearing frequently helps clients navigate these technical specifications. In this comprehensive guide, we will break down the ISO 492 precision grad...