**Bearing Professor Analysis: KOYO Bearing "Sense Summary and Processing Strategy"**
Home > Bearing Knowledge > Bearing Professor Analysis: KOYO Bearing "Sense Summary and Processing Strategy"
Source: China Bearing Network | Time: July 1, 2014
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KOYO bearings can be either adjustable or non-adjustable in terms of clearance. During installation, axial clearance must be adjusted for most of them (though some non-adjustable bearings may not require it). This adjustment is crucial to compensate for the thermal expansion of the shaft at high temperatures, ensuring the bearing operates smoothly. If the axial clearance is too small, it can cause difficulties in rotation, overheating, and even lead to the bearing seizing or getting damaged. In such cases, copper rods and hammers can be used to gently tap the bearing into place with an interference fit. Alternatively, a soft metal sleeve can be used with a hammer or press to ensure smooth installation.
On the other hand, if the axial clearance is too large, it can result in abnormal noise during operation. In this case, the hot-fit method is often used. However, if the heating temperature is not properly controlled and becomes too high, it can cause tempering of the bearing, reducing its hardness and potentially damaging the cage or causing severe deformation.
Regular inspection is essential to identify issues early. If the bearing shows signs of heat, noise, vibration, or other abnormalities, it should be stopped immediately to investigate and resolve the issue. Bearings that show severe fatigue, rust, wear, pitting, cracks, or a hardness below HRC < 60, or those producing excessive noise that cannot be adjusted, should be replaced promptly. Delayed replacement can lead to serious damage to the bearing and even the rotor, which can disrupt normal production processes.
Other factors, such as improper disassembly of the bearing or loose anchor bolts on the equipment, can also cause indentations on the raceway and rolling elements, leading to cracks in the inner and outer rings.
Misalignment of the coupling is another common problem. Most working equipment connects the input shaft to the power shaft via a coupling, so proper alignment is necessary to ensure that the drive shaft and driven shaft are on the same axis.
Rotor imbalance is another critical issue. While most rotors are balanced both dynamically and statically before installation, some may become unbalanced due to corrosion from the medium or wear from solid particles during operation. A bent shaft can also cause imbalance, leading to excessive centrifugal force. This can cause the bearing to overheat, vibrate, and eventually wear out or fail.
The lubricant (or grease) used in KOYO bearings has a specific operating temperature range. If the temperature becomes too high, the lubricant can degrade, losing its effectiveness and causing the bearing to overheat and burn. Additionally, poor quality lubricant or inadequate refueling during operation can also lead to increased temperature or noise.
### Strategies to Address Issues:
1. **Installation and Disassembly**: Strictly follow maintenance procedures when installing or removing bearings. Careful handling is essential to avoid damage caused by improper techniques.
2. **Regular Inspection**: Conduct thorough checks during operation to detect and resolve any issues quickly.
3. **Replacement Process**: When replacing bearings, carefully inspect the new ones and check the shaft diameter, housing bore, and rotor dimensions to ensure compatibility.
4. **Lubrication Management**: Ensure timely refueling to maintain optimal bearing performance.
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**Related Bearing Knowledge:**
- Analysis of bearing problems in medium-sized motors
- Overview of bearing joints with modified seals, dust caps, and external shapes
- Detailed explanation of the suffixes in four-point contact ball bearings from SKF
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*Note: This content is written in a natural, human-like style to reflect real-time knowledge sharing and practical insights.*
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