1. Introduction
This manual provides essential information for the proper installation, operation, and maintenance of the SKF 22218 E/C4 Spherical Roller Bearing. Adhering to these instructions will ensure optimal performance and extend the service life of the bearing.
Figure 1: SKF 22218 E/C4 Spherical Roller Bearing. This image displays three spherical roller bearings, highlighting their robust design with inner and outer rings, and visible rollers.
The SKF 22218 E/C4 is a spherical roller bearing designed for high radial loads and capable of accommodating axial forces in both directions. Its design allows for compensation of alignment errors and shaft deflections, making it suitable for demanding industrial applications.
2. Setup and Installation
Proper installation is crucial for the longevity and performance of the spherical roller bearing. Follow these guidelines carefully:
- Preparation: Ensure the shaft and housing seats are clean, free from burrs, and within specified tolerances.
- Heating (if applicable): For larger bearings, heating the inner ring to approximately 80-100°C (176-212°F) can facilitate easier mounting onto the shaft. Use an induction heater or oil bath. Do not exceed 120°C.
- Mounting:
- For straight bore bearings, press the bearing onto the shaft using appropriate tools, ensuring force is applied evenly to the inner ring.
- Ensure the bearing is seated squarely against the shaft shoulder.
- Lubrication: Apply a suitable grease or oil before and during installation. Refer to the "Maintenance" section for lubrication details.
- Clearance Check: After mounting, verify that the bearing can rotate freely without excessive play or binding.
Warning: Incorrect installation can lead to premature bearing failure and potential equipment damage.
3. Operating Instructions
The SKF 22218 E/C4 bearing is designed for reliable operation under specified conditions. Observe the following during operation:
- Load Capacity: Do not exceed the bearing's specified radial and axial load limits.
- Speed Limits: Operate within the recommended speed limits to prevent overheating and excessive wear.
- Temperature Monitoring: Regularly monitor the bearing temperature. Unusual temperature increases may indicate lubrication issues or impending failure. The bearing is designed for temperatures up to 120°C without special heat stabilization.
- Vibration Monitoring: Excessive vibration can be a sign of bearing damage or misalignment.
This bearing type is commonly used in applications such as elevators, textile machines, food processing machines, and cranes due to its ability to handle high loads and misalignment.
4. Maintenance
Regular maintenance is essential for maximizing the service life of your SKF spherical roller bearing.
4.1 Lubrication
The 22218 E/C4 bearing features a lubrication groove and three holes (W33 suffix) for efficient relubrication. Compatible lubricant: Grease.
- Lubricant Type: Use high-quality industrial grease suitable for spherical roller bearings and the operating temperature range.
- Relubrication Interval: Determine relubrication intervals based on operating conditions (speed, load, temperature, environment). Consult SKF lubrication guidelines for specific recommendations.
- Method: Apply grease through the designated lubrication holes until fresh grease appears at the seals (if present) or around the bearing edges. Avoid over-greasing.
4.2 Inspection
- Periodically inspect the bearing for signs of wear, corrosion, or damage.
- Check for unusual noise or vibration during operation.
- Ensure proper sealing (if external seals are used) to prevent contamination.
5. Troubleshooting
This section provides guidance on common issues that may arise with spherical roller bearings.
| Symptom | Possible Cause | Action |
|---|---|---|
| Excessive Noise |
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| Overheating |
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| Vibration |
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6. Specifications
Detailed technical specifications for the SKF 22218 E/C4 Spherical Roller Bearing:
| Characteristic | Value |
|---|---|
| Brand | SKF |
| Item Number | 22218E/C4 |
| Inner Diameter (d) | 90 mm (3.5433 inch) |
| Outer Diameter (D) | 160 mm (6.2992 inch) |
| Width (B) | 40 mm (1.5748 inch) |
| Weight | 3.18 kg |
| Bore Type | C - Cylindrical Bore |
| Lubrication Enhancement | W33 - Lubrication Groove and 3 Holes |
| Seal | No Seal (Open) |
| Cage Type | S - Steel or Standard Cage |
| Radial Internal Play | C4 Internal Play (Higher than C3) |
| Precision | Standard Precision |
| Heat Stabilization | No Heat Stabilization - Temperatures up to 120 °C |
| Vibrating Screen Execution | Non Vibrating Screen Execution |
| Suffix Description E | d ≤65mm, Two Window-Type Steel Cages, Flangeless Inner Ring And Guide Centered On The Inner Ring. When d >65 mm Same As <65mm But Guide Ring Centered On The Cages |
| Suffix Description C4 | Bearing Internal Clearance Greater Than C3 |
7. Warranty Information
For specific warranty terms and conditions related to SKF products, please refer to the official SKF warranty statement provided at the time of purchase or contact an authorized SKF distributor. Warranty coverage typically addresses manufacturing defects under normal operating conditions.
8. Support and Contact
For technical assistance, product inquiries, or support, please contact your authorized SKF distributor or visit the official SKF website. Ensure you have your product model number (22218 E/C4) and any relevant purchase information available when seeking support.
Online Resources: www.skf.com
