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When it comes to selecting and applying INA bearings, it's essential to consider various factors that affect performance, durability, and efficiency. The right choice ensures optimal operation and longevity of the mechanical system. Here’s a detailed guide on how to select and apply INA bearings properly.
1. **Choosing the Right INA Bearing Type**:
The selection of an INA bearing type is typically done by the user's technical team based on the operating conditions of the equipment and the load it will bear. It's crucial for sales personnel to understand whether the selected bearing can handle the actual load. If the bearing doesn't meet the operational needs, it's important to recommend a different type. Unless it's a special application, most standard bearings are straightforward to choose.
2. **Selecting the Clearance**:
Users often only specify the type and grade when purchasing INA bearings, rarely mentioning the clearance. However, the clearance plays a vital role in performance. Factors such as speed, temperature, and fit directly influence the clearance selection. Most motors below 3500 RPM use CM clearance, while high-speed or high-temperature motors may require larger clearance. After installation, the clearance may decrease due to thermal expansion. For example, if the initial clearance is 0.01mm and the interference is 0.01mm, the final clearance would be around 0.004mm. Ideally, zero clearance gives the best noise and life performance, but in practice, a small clearance (0.002–0.004mm) is more common to account for temperature changes.
3. **Grease Selection**:
The choice of grease depends on the bearing's speed, temperature, noise requirements, and starting torque. Sales staff should have a thorough understanding of different types of greases and their applications to ensure the best performance under specific conditions.
4. **Seal Type Selection**:
INA bearings can be lubricated with either oil or grease. Oil-lubricated bearings are commonly used, while grease-lubricated ones often come with dust covers or rubber seals. Dust covers are ideal for high-temperature environments, while seals can be either contact or non-contact. Contact seals offer better dust protection but increase starting torque, while non-contact seals reduce it.
INA Bearings are widely used in automotive motors, home appliances, motorcycles, and health care devices. They are known for their low noise and long service life.
There are numerous types and sizes of INA bearings available. To ensure that the machinery performs as intended, it's crucial to select the most suitable bearing. The selection process involves analyzing multiple factors from different perspectives. While there are no strict standards, the general steps are:
- Understand the operating conditions of the machinery and bearings.
- Clarify the requirements for the bearings.
- Choose the appropriate bearing type.
- Determine the installation method.
- Select the correct size.
- Choose the appropriate standard.
- Evaluate the installation method based on operating and environmental conditions.
To make an accurate selection, you need to gather data on the following aspects:
- Function and layout of the mechanical equipment.
- Components where the bearing is installed.
- Load on the bearing (size and direction).
- Rotational speed.
- Vibration and impact.
- Temperature (ambient and rise).
- Environmental conditions (corrosive, clean, lubrication).
In most cases, two bearings support a shaft in both radial and axial directions. One side is called the fixed-side bearing, which handles both radial and axial loads, while the other is the free-side bearing, which only supports radial loads and allows axial movement. This helps manage thermal expansion and alignment errors.
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Selection and application of INA bearings
**Selection and Application of INA Bearings**
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Source: Bearing Network | Time: 2013-06-15