81144 -M INA cylindrical roller thrust bearing

INA 81144-M Cylindrical Roller Thrust Bearing (With Brass Cage)

The INA 81144-M is a high-performance rolling unit designed to accommodate exceptionally heavy axial loads acting in a single direction. The assembly consists of a cylindrical roller and cage assembly along with two washers: a shaft washer (WS) and a housing washer (GS). The standout feature of this model is the solid brass cage (M). It provides superior roller guidance, exhibits high resistance to vibrations, and ensures operational stability at elevated temperatures. Thanks to the linear contact of the rollers, this bearing offers extreme axial rigidity in a compact form factor.

Application

• Heavy Machinery: Axial support for spindles in large machine tools, presses, and extruders.
• Energy Sector: Vertical shaft bearings for generators and massive industrial pumps.
• Mining Industry: Drive components in drilling rigs and heavy construction equipment.
• Marine Engineering: Propulsion shaft blocks and steering mechanisms for large vessels.
• Metallurgy: Rolling mill components subjected to high axial pressures.

Technical Specification

• Manufacturer: INA (Schaeffler Group - Germany).
• Designation: 81144-M.
• Dimensions: 220 mm (ID) × 270 mm (OD) × 37 mm (Total height).
• Cage Type: M – Solid brass cage (roller-guided).
• Load Type: Unidirectional axial loads only.
• Design: Separable (simplifies independent mounting of individual components).

Features and Benefits

• Extreme Rigidity: Cylindrical geometry minimizes deflection under load, ensuring the precision of large assemblies.
• Durable Brass Cage (M): Reduced risk of seizure and better performance under boundary lubrication compared to plastic cages.
• Low Axial Height: The 811 series allows for space savings while maintaining massive load capacity.
• Ease of Maintenance: Separable design allows for independent installation of washers and the assembly, shortening downtime.
• SCHAEFFLER Quality: Guaranteed highest steel purity and precision-engineered raceways for extended fatigue life.

Why Choose This Product

By choosing the INA 81144-M bearing, you are investing in a premium product from a global leader in rolling technology. In applications with a 220 mm shaft where axial forces are substantial, the solid brass cage provides a safety margin that standard solutions cannot match. It is the foundation for the reliable operation of your heaviest machinery, translating into real savings through extended maintenance intervals.