51207 J9 ISB thrust ball bearing

ISB 51207 J9 Thrust Ball Bearing

The ISB 51207 J9 is a single-direction thrust ball bearing designed to accommodate axial loads acting in one direction only. The assembly consists of three separable parts: a shaft washer, a housing washer, and a ball and cage thrust assembly. Engineered with **J9 tolerance**, this bearing ensures high operational stability, low friction, and effective axial power transmission in applications where radial forces are absent.

Application

• Industrial gearboxes and vertical shaft reducers.
• Regulating mechanisms and lead screws.
• Transport equipment and lifting machinery.
• Machine tool spindles (as auxiliary support).
• Crane hooks and low-speed turntables.

Technical Specification

• Manufacturer: ISB (Italy)
• Designation: 51207 J9
• Type: Single-direction thrust ball bearing
• Series: 512
• Load Handling: Purely axial (one direction)
• Cage: Pressed steel
• Tolerance: J9 (precision fit)

Note: Standard dimensions for the 51207 model are 35 mm (Bore) × 62 mm (OD) × 18 mm (Height). Please check the manufacturer's data for dynamic and static load ratings.

Features and Benefits

• Axial Load Optimization – specifically designed for efficiency along the shaft axis.
• Separable Components – the interchangeable rings simplify installation, removal, and maintenance inspections.
• Low Friction Operation – refined raceway geometry minimizes energy loss and heat buildup.
• J9 Precision Fit – ensures better centering of components and quieter operation under load.
• Industrial Reliability – ISB quality standards provide a long service life with proper lubrication.

Why Choose This Product

The ISB 51207 J9 thrust bearing is a proven solution for applications where axial load management is critical. Its separable design allows for easy maintenance, while the precision manufacturing ensures reliable performance under pressure. This is a cost-effective and durable choice for ensuring smooth motion in a wide variety of industrial mechanical systems.