81252 -M INA cylindrical roller thrust bearing

INA 81252-M Cylindrical Roller Thrust Bearing (Heavy Series)

The INA 81252-M is a high-performance rolling unit engineered to accommodate exceptionally heavy axial loads in a single direction. The assembly consists of a cylindrical roller and cage assembly along with shaft and housing washers. The standout feature of this model is the solid brass cage (M), which provides superior roller guidance, excellent heat dissipation, and high resistance to shock and vibration. Due to the linear contact of the rollers, the 812 series offers maximum axial stiffness required for the heaviest industrial machinery.

Application

• Heavy Industry: Main axial bearing for massive hydraulic presses and rolling mills.
• Energy Sector: Bearing support for vertical shafts in large-scale generators and hydroelectric turbines.
• Metalworking: Spindles for heavy-duty vertical lathes and large machining centers.
• Marine Engineering: Propulsion shaft thrust blocks for large vessels.
• Mining: Deep-sea drilling drives and massive crushing equipment.

Technical Specification

• Manufacturer: INA (Schaeffler Group - Germany).
• Designation: 81252-M.
• Dimensions: 260 mm (ID) x 340 mm (OD) x 62 mm (Total Height).
• Cage Type: M – Solid brass cage (roller-guided).
• Load Rating: Heavy Duty – designed for extreme axial pressures.
• Material: Heat-treated steel with exceptional metallurgical purity.

Features and Benefits

• Maximum Axial Rigidity: Cylindrical geometry ensures minimal deflection under full load, critical for large-scale machine precision.
• Solid Brass Cage (M): Enhances bearing lifespan under difficult lubrication conditions and provides a safety margin at high temperatures.
• Separable Design: Allows for independent mounting of washers and the roller assembly, simplifying heavy machinery installation.
• SCHAEFFLER Quality: Precision-engineered for smooth operation and significant energy savings.
• Extended Service Life: Optimized roller profiling reduces edge stresses.

Why Choose This Product

By choosing the INA 81252-M bearing, you are investing in a premium product from a global leader in rolling technology. In applications involving a 260 mm shaft, any unplanned downtime results in staggering costs. The brass cage and Schaeffler’s German engineering provide a level of reliability that standard alternatives cannot match. It is the bedrock of uptime for your most demanding industrial infrastructure.