Bearing 21311 M NTN



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Product detailed description
Bearing 21311 M NTN – High-Quality and Reliable Performance
21311 M NTN is a precision-engineered bearing designed to meet the demanding requirements of various industrial and mechanical applications. Manufactured by NTN, a globally recognized leader in bearing technology, this bearing offers superior durability, excellent load capacity, and smooth operation, ensuring optimal performance and extended service life.
This bearing is part of the 213 series, known for its spherical roller design which allows it to accommodate heavy radial loads and moderate axial loads in both directions. The robust construction of 21311 M NTN makes it ideal for use in heavy machinery, mining equipment, construction vehicles, and other industrial applications where reliability and toughness are crucial.
Key Features and Benefits
- Durability: Made with high-quality materials and precision manufacturing processes to withstand harsh operating conditions.
- Load Capacity: Designed to handle high radial loads and moderate axial loads, ensuring stability and performance under heavy stress.
- Self-Aligning Capability: The spherical roller design compensates for misalignment and shaft deflections, reducing wear and tear.
- Low Maintenance: Engineered for long service intervals with minimal lubrication requirements.
- Versatility: Suitable for a wide range of applications including industrial gearboxes, conveyor systems, and heavy-duty motors.
Technical Specifications
The 21311 M NTN bearing typically features the following dimensions according to NTN’s standard catalog for 213 series spherical roller bearings:
- Bore Diameter: 55 mm
- Outer Diameter: 100 mm
- Width: 25 mm
These precise dimensions allow for easy integration into existing machinery setups and ensure compatibility with various industrial components.
Why Choose 21311 M NTN?
When selecting a bearing for critical applications, reliability and performance are paramount. The 21311 M NTN bearing delivers exceptional value through its engineered design and trusted NTN quality. It minimizes downtime by providing consistent operation and resisting premature failure, ultimately enhancing productivity and reducing maintenance costs.
Whether you are upgrading existing equipment or designing new machinery, 21311 M NTN is a dependable choice that supports operational efficiency and durability. Invest in NTN bearings to experience industry-leading technology and unmatched reliability.

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NTN Corporation: Leading Manufacturer of Bearings and Transmission Technology
NTN Corporation is a globally recognized manufacturer specializing in high-quality bearings and advanced transmission technology. Founded in 1918 in Osaka, Japan, NTN has a rich history of innovation and excellence, growing to become one of the leading suppliers in the rolling bearings industry worldwide.
Company History
Established over a century ago, NTN pioneered the development of precision bearings with a focus on durability and performance. Throughout its history, NTN has expanded its product portfolio and global presence, driven by continuous research and development to meet the evolving demands of industrial and automotive sectors.
Product Range
NTN offers a comprehensive range of products designed to optimize machinery performance and efficiency, including:
- Ball Bearings: Deep groove ball bearings, angular contact ball bearings, and self-aligning ball bearings.
- Roller Bearings: Cylindrical roller bearings, spherical roller bearings, tapered roller bearings, and needle roller bearings.
- Precision Bearings: Super-precision bearings for machine tools and robotics.
- Transmission Systems: Constant velocity (CV) joints and automotive drive shafts.
- Linear Motion Products: Linear guides and actuators for industrial automation.
- Other Components: Mounted units, bearing accessories, and custom-engineered solutions.
Main Focus and Technologies
NTN's core focus is to deliver reliable and innovative bearing solutions that enhance machine life and performance. The company invests heavily in advanced material technology, lubrication methods, and manufacturing precision to ensure optimal product durability and efficiency. NTN is also a pioneer in developing silicon nitride ceramic bearings, which offer superior resistance to corrosion and high-speed capability.
Application Areas
NTN bearings and transmission products are widely used across various industries worldwide, including:
- Automotive: Wheel hub bearings, CV joints, transmission components, and electric vehicle parts.
- Industrial Machinery: Machine tools, conveyors, pumps, and compressors.
- Aerospace: Precision bearings for aircraft engines and control systems.
- Railway: Bearings for rolling stock and rail infrastructure.
- Energy: Wind turbines, hydroelectric equipment, and power generation machinery.
- Robotics & Automation: High-precision bearings aiding in smooth and accurate robotic movement.
Company Headquarters
NTN Corporation is headquartered in Osaka, Japan. The company operates numerous manufacturing plants, research centers, and sales offices worldwide to support its diverse customer base.