**Thrust Ball Bearing Terminology**
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*Created on 2018/5/16*
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When it comes to thrust ball bearings, understanding the terminology is essential for proper selection and application. One of the key concepts is **bearing clearance**, which refers to the internal space between the bearing components. This clearance can be calibrated in different ways depending on the installation.
There are two main types of clearance: **original clearance** and **working clearance**. The original clearance is the gap between the inner and outer rings when no external forces are applied. Working clearance, on the other hand, is the actual space after the bearing is mounted and under operating conditions. It accounts for factors like thermal expansion and interference fit.
For example, the standard clearance (C0) is commonly used, but in some cases, a modified clearance such as C2 may be required. The difference between maximum and minimum clearance must be carefully considered during calibration. Misusing the original clearance can lead to premature failure or reduced performance.
The **selection of bearing clearance** depends on several factors, including load type, speed, and temperature. For instance, if the bearing is subjected to high axial loads, a tighter clearance might be necessary to prevent excessive play. On the other hand, if there’s a need to reduce noise or vibration, a slightly larger clearance could be beneficial.
It's also important to note that **radial clearance measurement** should be done with care. Special instruments are typically used for accurate readings, although manual methods like the hand-push technique can be employed in some cases. However, when the clearance is minimal, instrument measurements are more reliable.
When measuring with a thickness gauge, it's crucial to follow standard procedures. Avoid applying pressure directly on the rolling elements and ensure that the balls fall into the raceway grooves properly. For multi-row bearings, each row’s clearance should be measured individually, and the average value is taken as the overall radial clearance.
Another important concept is **static and dynamic loads**. Static load refers to a constant or slowly changing load, while dynamic load involves periodic or impact forces. Bearings are rated based on their ability to handle these loads, with values like C (dynamic load capacity) and Co (static load capacity) being critical in calculations.
Axial load is the force acting along the axis of the bearing, while radial load acts perpendicular to it. These loads influence the bearing’s performance and lifespan. Additionally, **bearing oscillation** is classified into grades like Z, Z1, Z2, Z3, and V, V1, V2, V3, which indicate the level of precision and quality.
In summary, understanding thrust ball bearing terminology helps in making informed decisions about their use, maintenance, and performance. Whether you're selecting the right clearance, measuring the correct tolerances, or determining load capacities, having a clear grasp of these terms ensures better results and longer service life.
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Please visit [China Bearing Network](http://www.chinabearingnetwork.com) for more information.
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Thrust Ball Bearing Terminology
Source: Bearing Network | Time: 2013-12-05
*Created on 2017/12/25* var cpro_id = 'u3171089'; |
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