Analysis and Solutions for NSK Bearing Quality Composition Issues
Source: China Bearing Network | Date: June 29, 2013
| /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089'; |
When it comes to NSK bearings, many customers believe that a shiny exterior means high quality. However, this is not always the case. The appearance of an NSK bearing should be smooth and dark in color, which indicates proper material quality and precise manufacturing processes. The use of high-quality steel, along with proper grinding and cutting fluids, plays a significant role in determining the overall quality.
Another common misconception is that bright chamfers indicate better quality. In reality, the color of the chamfer reflects the heat treatment process. A black chamfer usually means the bearing has undergone quenching, which enhances its hardness. It's important to understand that a darker chamfer does not mean poor quality; it may simply reflect a different finishing technique.
Some people think that a single-piece cage is better than a two-piece one. While modern technology allows for integrated cages, this doesn’t necessarily mean better performance. In fact, some two-piece designs offer superior durability and stability under certain conditions.
In general, the service life of NSK bearings depends on three key factors: the quality of the bearing itself, the operating environment, and the installation method. Even the best bearings can fail if not used or installed properly.
It’s quite common for NSK bearings to experience issues during operation. What matters most is how you identify and address these problems. Here are some typical faults and their solutions:
1. **High Temperature During Operation**
If the temperature of the NSK bearing becomes excessively high, it could be due to poor lubrication, incorrect oil viscosity, tight assembly, or excessive load. Always check the temperature by touching the housing—if it feels unusually hot, there may be a problem.
2. **Abnormal Noise**
Bearings typically operate with a soft, consistent sound. If you hear loud noises, irregular sounds, or impacts, it may indicate internal damage. This can be caused by wear on the inner and outer rings, misalignment, insufficient lubrication, or damaged rolling elements.
3. **Fatigue Spalling on Raceways**
Over time, repeated loading can cause fatigue spalling on the raceways. This leads to reduced accuracy, vibration, and noise. Proper installation and regular maintenance can help prevent this issue.
4. **Burned Bearings**
If the raceway or rolling elements show a tempered color, it may indicate overheating. This often happens due to lack of lubrication, poor oil quality, or excessive friction.
5. **Plastic Deformation**
Under heavy static or impact loads, NSK bearings may develop uneven pits on the contact surfaces. This is more common in low-speed applications and can reduce the bearing’s performance.
6. **Cracks in the Raceway**
Cracks can occur due to improper installation, loose fits, or deformation of the housing. Ensuring correct alignment and fit is essential to avoid such issues.
7. **Cage Damage**
A broken cage can result from insufficient lubrication, damaged rolling elements, or misalignment. Regular inspection and maintenance can help prevent cage failure.
8. **Metal Adhesion on Rolling Elements**
If metal from the cage sticks to the rolling elements, it may be due to inadequate lubrication or the rolling elements getting stuck in the cage.
9. **Severe Raceway Wear**
Foreign particles, improper lubrication, or using the wrong type of oil can lead to severe wear on the raceway. Keeping the bearing clean and using the right lubricant is crucial.
In summary, understanding the causes of NSK bearing failures and knowing how to diagnose them is essential for maintaining equipment performance and extending the lifespan of the bearings. Regular checks, proper installation, and good maintenance practices are your best defense against unexpected failures.
Related Bearing Knowledge:
- Methods for installing imported bearings
- Pre-installation considerations for bearings
- Calculation methods for non-liquid sliding bearings
This article is sourced from China Bearing Network.
Please visit [China Bearing Network](http://) for more information.
Previous: Coupling Effect, Classification, and Selection
Next: Importance of Proper Fit in Imported Rolling Bearings
Hot Sale Mass Flow Meter
Zhejaing Sealand Technology Co., Ltd. is a trustworthy manufacturer of Mass Flow Meter, Mass Flowmeter, Mass Meter, Flow Meter, Flowmeter, ATEX, IECEx & CE approved. The product range covers different size from DN03 to DN150, and bigger sizes are being developed.
Sealand mass flow meter is designed and produced according to world`s latest Coriolis technology with exelent appearance, stability and accuracy to measure mass flow rate of a fluid traveling through a tube, widely applied to alternative energy, oil & gas, chemical, food & beverage, industrial energy, marine, power, pulp & paper, water & wastewater industries, etc.
Mass flow meter measures the mass based on Coriolis effort. The operating principle involves inducing a vibration of the tube through which the fluid passes. The vibration, though not completely circular, provides the rotating reference frame that gives rise to the Coriolis effect. While specific methods vary according to the design of the flow meter, sensors monitor and analyze changes in frequency, phase shift & amplitude of the vibrating flow tubes. The changes observed represent the mass flow rate and density of the fluid.
Mass Flow Meter, Mass Flowmeter, Mass Meter, Flow Meter, Flowmeter
Zhejiang Sealand Technology Co., Ltd. , https://www.sealandflowmeter.com