KGI 22212 CCKW33 Spherical Roller Bearing
The 22212 CCKW33 is a "Spherical Roller Bearing," which means it acts like a flexible joint. It contains two rows of barrel-shaped rollers that can tilt slightly within the outer ring. This allows the bearing to continue spinning smoothly even if the shaft bends or the housing is slightly tilted. It doesn't just handle the load; it manages the movement.
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Product Detail
Spherical Roller Bearing 22212 CCKW33 KGI Brand | High Performance for 60mm Bore / 55mm Shaft Systems
This comprehensive guide explores the features, installation, and technical specifications of the 22212 CCKW33 bearing by KGI. Designed for industrial buyers and maintenance teams, this page provides clear insights into why this bearing is a top choice for heavy-duty applications. For bulk orders or technical support, visit the KGI Trading portal.
The Power of Self-Alignment: Why Choose the 22212 KGI?
In heavy industries—like mining, steel production, and large-scale manufacturing—machinery is subject to massive loads and constant vibration. In these environments, shafts rarely stay perfectly straight. Even a tiny misalignment can cause a standard ball bearing to overheat and shatter.
The 22212 CCKW33 is a "Spherical Roller Bearing," which means it acts like a flexible joint. It contains two rows of barrel-shaped rollers that can tilt slightly within the outer ring. This allows the bearing to continue spinning smoothly even if the shaft bends or the housing is slightly tilted. It doesn't just handle the load; it manages the movement.
Key Advantages for Industrial Operations
- Massive Radial Load Capacity: Unlike balls that touch at a single point, barrel rollers provide "line contact," distributing weight across a larger surface to prevent metal fatigue.
- Vibration Dampening: The robust steel cage (CC design) is built to withstand the constant shaking of crushers and vibratory screens.
- Longer Service Life: KGI's precision manufacturing reduces friction, meaning less heat buildup and a significantly longer lifespan compared to generic alternatives.
- Maintenance Friendly: With built-in lubrication holes, re-greasing is fast and effective, ensuring the rollers stay protected even in dusty environments.
Understanding the Code: 22212 CCKW33
Bearing codes can seem like a puzzle, but each part of the name tells you exactly what you are getting:
- 222: This is the series number. It tells you it is a double-row spherical roller bearing designed for high radial loads.
- 12: This indicates the size. In bearing language, 12 corresponds to a 60mm bore (internal diameter).
- CC: Refers to the internal design—two window-type steel cages and a flangeless inner ring, optimized for low friction.
- K (Tapered Bore): This is vital! The inner hole is cone-shaped (1:12 ratio). It is designed to be mounted on a straight shaft using an Adapter Sleeve.
- W33: Features a groove and three lubrication holes on the outer ring for easy grease application.
Technical Specifications & Dimensions
Required Accessories for Installation
Since the 22212 CCKW33 has a tapered bore, it cannot be pushed directly onto a 60mm shaft. To mount it securely on a 55mm shaft, you will need the following assembly:
- Adapter Sleeve (H 312): The wedge that locks the bearing to the shaft.
- Lock Nut (KM 12): Used to tighten the bearing onto the sleeve.
- Lock Washer (MB 12): Ensures the nut doesn't loosen under vibration.
Pro-Tips for Installation & Maintenance
- Check Clearance: When tightening the KM nut, use a feeler gauge to check the internal clearance. If you over-tighten, you might squash the rollers, leading to rapid overheating.
- Lubrication Choice: Use high-quality EP (Extreme Pressure) grease. In hot or dusty environments, re-lubricate through the W33 holes every 500 to 1,000 hours of operation.
- Cleanliness: A single grain of sand can ruin a bearing. Never unpack the KGI bearing until the shaft and housing are perfectly clean and ready.
- Locking: Always bend a tab of the MB washer into a slot on the KM nut. Never skip this step!
Frequently Asked Questions
Q: Can I use this bearing on a 60mm shaft?
Because this is the "K" (tapered) version, it is specifically designed for a sleeve. For a 60mm straight shaft, you would need the 22212 CCW33 (without the K).
Q: Is KGI a reliable brand for heavy machinery?
Yes, KGI bearings are manufactured to international ISO standards, offering a perfect balance between high-end performance and cost-efficiency for industrial replacements.
Q: How much grease should I put inside?
For most industrial applications, fill the bearing itself 100% with grease, but fill the housing (the outer case) only 30% to 50% to allow for expansion and heat dissipation.
Get a Quote for KGI 22212 CCKW33 Bearings
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