Self Aligning Double Row Roller Bearing 220x400x108 22244 Bearing For Energy Sectors
22244 Self-Aligning Roller Bearing for Heavy Machinery & Energy Sectors. This advanced bearing is engineered to meet stringent industrial requirements, offering reliable performance across diverse applications through sophisticated design, robust materials, and exceptional capabilities.
Design and Structure
Inner Ring and Outer Ring
The inner ring features a precisely machined double-row raceway designed for a 220mm shaft diameter, ensuring efficient force transmission and minimal slippage. The outer ring's spherical raceway provides self-aligning capabilities, accommodating misalignments of 1°-2.5° between shaft and housing, significantly enhancing operational lifespan and reliability.
Rolling Elements and Cage
Double-row barrel-shaped rollers work in harmony with the spherical raceway, handling both radial and bidirectional axial loads. Made from high-grade bearing steel with surface roughness under Ra0.1μm, these rollers reduce friction and improve energy efficiency.
Cage options include brass for excellent thermal conductivity and mechanical strength (up to 150°C), or steel for extreme heavy-load applications. Both maintain proper roller alignment and spacing.
Sealing Structure (Optional)
Available with contact seals (nitrile rubber) for dust/moisture protection in harsh environments, or non-contact labyrinth seals for high-speed applications up to 3000rpm.
Key Parameters
| Parameter |
Value |
| Inner Diameter (d) |
220mm |
| Outer Diameter (D) |
400mm |
| Width (B) |
108mm |
Performance Advantages
Exceptional Load-Carrying Capacity
Basic dynamic load rating of 1570kN and static load rating of 2430kN withstand intense impact forces in mining crushers and high-pressure rolls in metallurgical mills.
Superior Self-Aligning Capability
Automatically compensates for shaft deflection and installation misalignments, extending service life by over 30% in long-shaft applications like paper machine press rolls and wind turbine main shafts.
Robust Wear Resistance and Temperature Stability
High-carbon chromium bearing steel (SUJ2) heat-treated to HRC60-65 hardness with phosphated surface. Operates from -40°C to 120°C, with special variants available for temperatures exceeding 200°C.
Low Friction and Vibration Damping
Friction coefficient as low as 0.0015 reduces energy consumption. Vibration velocity controlled below 65dB ensures smooth operation in precision applications like machine tool spindles.
Material Quality
Material of Rings and Rollers
High-purity bearing steel (GCr15SiMn) processed with vacuum degassing for excellent density. Manufacturing includes cold heading forming and high-temperature tempering for uniform internal structure and impact toughness exceeding 12J/cm².
Cage Material
Brass (H62) cages offer superior thermal conductivity and mechanical strength for medium to high-speed applications. Steel cages provide maximum durability for extreme load conditions.
Application Fields
- Heavy Industrial Machinery: Jaw crusher eccentric shafts, rolling mill work rolls
- Construction Machinery: Gearbox output shafts, loader/excavator slewing bearings, crane winches
- Energy Equipment: Wind turbine main shafts, water turbine main shafts in hydropower stations
- Papermaking and Textile Machinery: Calender rolls, drying roll groups, dyeing and finishing equipment
Installation and Maintenance
Installation
Use specialized tools like hydraulic nuts for uniform force application. For tapered inner rings, adjust clearance to 0.12-0.25mm using lock nuts.
Lubrication
Grease lubrication: Extreme pressure lithium-based grease (NLGI Grade 2), filling 1/3 to 1/2 of bearing space. Oil lubrication: ISO VG 46 or 68 lubricating oil with 0.1-0.3MPa pressure for forced lubrication systems.
Maintenance
Monitor bearing temperature (below 70°C) and check for abnormal vibration/noise. Use pullers for disassembly to prevent damage to surrounding components.
Conclusion
The 22244 bearing exemplifies engineering excellence with high-strength construction, superior self-aligning capabilities, and broad adaptability. Its reliable performance under extreme loads, misalignments, and challenging conditions makes it indispensable for modern industrial machinery across multiple sectors.
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