K81224 -TV INA cylindrical longitudinal assembly

INA K81224-TV Cylindrical Roller and Cage Thrust Assembly (Reinforced Series)

The K81224-TV INA assembly is a precision rolling component consisting of a set of cylindrical rollers secured in a high-strength cage. This solution is dedicated to applications where minimal cross-sectional height is a priority while handling exceptionally heavy axial loads. The standout feature is the glass-fiber reinforced polyamide 66 cage (TV). This design ensures excellent roller guidance, reduced assembly weight, and significantly quieter operation compared to traditional metal cages.

Application

• Machine Engineering: Axial support for machine tool spindles and high-pressure actuators.
• Automation & Robotics: Compact turntables and positioners requiring high axial rigidity.
• Automotive Industry: Gearboxes, main transmissions, and control systems in heavy vehicles.
• Energy Sector: Vertical shaft bearings for generators and industrial pumps.
• Construction Machinery: Slewing mechanisms and hydraulic systems subjected to high longitudinal forces.

Technical Specification

• Manufacturer: INA (Schaeffler Group - Germany).
• Designation: K81224-TV.
• Dimensions: 120 mm (ID) × 170 mm (OD) × 15 mm (Assembly height).
• Cage Type: TV – Glass-fiber reinforced Polyamide 66.
• Series: 812 (Reinforced – higher load capacity compared to the 811 series).
• Compatibility: Works with shaft washers WS81224 and housing washers GS81224.

Features and Benefits

• High Axial Rigidity: Linear roller contact minimizes deflection under load, ensuring machine stability and precision.
• Modern Polyamide Cage: Reduces internal friction and heat generation, directly extending lubricant life.
• Space Efficiency: A height of only 15 mm allows for the design of compact bearing arrangements with massive strength.
• Design Flexibility: Can be used directly on hardened and ground machine surfaces or with dedicated washers.
• SCHAEFFLER Quality: Manufacturing to the highest standards guarantees a long fatigue life for the component.

Why Choose This Product

By choosing the INA K81224-TV assembly, you are investing in a product from the rolling technology leader – the Schaeffler Group. In 120 mm shaft applications where standard ball bearings fail to provide sufficient rigidity, the reinforced 812 series offers a solid foundation for reliability. The polyamide cage ensures smoother, quieter, and more energy-efficient operation, resulting in real operational benefits.