89440 -M INA cylindrical roller thrust bearing

INA 89440-M Cylindrical Roller Thrust Bearing (Heavy Duty Series)

The INA 89440-M is a massive rolling unit engineered to accommodate extreme axial loads in strategic industrial machinery. Belonging to the reinforced 894 series, it offers the highest rigidity and load capacity among all thrust bearing types. At its core is a solid brass cage (M), which precisely guides the rolling elements, dampens vibrations, and dissipates heat effectively. Due to its separable design, mounting on a 200 mm shaft is efficient, allowing for independent installation of the washers and the roller assembly.

Application

• Heavy Industry: Hydraulic presses with thousands of tons of force, steel rolling mills, and large-scale extruders.
• Energy Sector: Main axial bearing support in massive hydroelectric turbines and vertical generators.
• Mining & Quarrying: Deep-sea drilling drives, rotary tables, and heavy crushing equipment.
• Marine Engineering: Propulsion shaft thrust blocks for the largest ocean-going vessels.
• Civil Engineering: Slewing mechanisms in port cranes and TBMs (Tunnel Boring Machines).

Technical Specification

• Manufacturer: INA (Schaeffler Group - Germany).
• Designation: 89440-M.
• Dimensions: 200 mm (ID) x 400 mm (OD) x 122 mm (Total Height).
• Cage Type: M – Solid brass cage (roller-guided).
• Load Rating: Heavy Duty – designed for continuous operation under extreme pressure.
• Material: Heat-treated steel with exceptional metallurgical purity.

Features and Benefits

• Maximum Axial Rigidity: Linear roller contact ensures near-zero deflection, critical for large-scale machine precision.
• Brass Cage (M): Provides a safety margin under boundary lubrication conditions and protects against seizure.
• SCHAEFFLER Quality: Every unit undergoes rigorous ultrasonic testing to eliminate material micro-defects.
• Shock Resistance: The 894 series design is naturally resilient to sudden axial load spikes.
• Extended Service Life: Optimized LOG profiling of the roller ends reduces edge stresses.

Why Choose This Product

Investing in the INA 89440-M bearing is a guarantee of process security in applications where every minute of downtime costs thousands of euros. Bearing arrangements with a 200 mm bore operate in the world's harshest conditions—by choosing the 894 series from Schaeffler, you receive a product that sets the standard for durability. It is the bedrock of reliability for your heaviest industrial infrastructure.