This article is a comprehensive technical guide to **bearing installation**, designed to help engineers and maintenance personnel master proper mounting procedures, thereby preventing equipment damage and premature failure caused by human error. The article begins by outlining the basic definition and core friction-reducing functions of bearings, followed by a stark highlight of the severe consequences of improper installation, such as raceway damage, abnormal noise, and early failure. For practical operations, the guide details six critical pre-installation checks, including size compatibility and surface cleanliness. The core section provides an in-depth comparison of the two primary mounting methods: **Press Fit**, which is suitable for small bearings and strictly warns against applying pressure to the outer ring; and **Shrink Fit**, which is used for medium to large bearings, emphasizing that the heating temperature must not exceed 120°C and requires proper alignment during cooling. Finally, the article outlines standard, safe installation steps and key precautions, emphasizing the use of appropriate tools (such as a hydraulic press or mounting sleeve) and the importance of applying even force to ensure optimal operating conditions after installation.
Bearing mounting methods depend on the bearing type and type of fit. As bearings are usually used on rotating shafts, the inner rings require a tight fit. Bearings with cylindrical bores are usually mounted by pressing them on the shafts (press fit) or heating them to expand their diameter (shrink fit).
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