NACHI 53432U Thrust Ball Bearing

NACHI 53432U Thrust Ball Bearing

The NACHI 53432U is a single-row heavy series thrust ball bearing designed for maximum axial load capacity with an aligning seat housing washer that compensates for angular misalignment between the shaft and housing, featuring a bore diameter of 160 mm, outer diameter of 320 mm, and height of 150 mm. Single-direction thrust ball bearings are designed to sustain axial loads in one direction and locate a shaft axially in one direction – making them ideal for applications requiring precise axial positioning under purely axial or predominantly axial loading.

Design & Construction

Manufactured by NACHI (a division of Fujikoshi Corporation, Japan), the 53432U consists of a shaft washer, a housing washer, and a ball and cage assembly. The aligning seat housing washer features a spherical seating surface that allows the bearing to accommodate angular misalignment of up to approximately 1.5 degrees between the shaft and housing, compensating for mounting errors or shaft deflection under load. Washers and balls are precision-ground from high-carbon chromium bearing steel (AISI 52100 / JIS SUJ2), heat-treated to achieve optimum hardness and fatigue life. The pressed steel cage retains the balls at uniform spacing for consistent load distribution and quiet operation.

Performance

Rated for a basic dynamic axial load capacity of 680.0 kN and a static axial load capacity of 2410.0 kN, this bearing delivers reliable performance under sustained axial loading. Permissible speeds reach 440 rpm with grease lubrication and 670 rpm with oil lubrication. A minimum axial load must be maintained during operation to prevent ball skidding and ensure proper rolling contact between the balls and raceways.

Typical Applications

• Machine tool spindles and lead screws
• Automotive steering columns and clutch release mechanisms
• Crane hooks, slewing rings, and lifting equipment
• Gearbox thrust faces and differential assemblies
• Pump shafts and compressor thrust loads
• Vertical shaft arrangements and turntable supports
• Jack screws, presses, and actuators
• Agricultural and industrial transmission shafts