Introduction
Timken is a leading global company in friction management and power transmission, serving industries such as automotive and aerospace. It is the largest producer of tapered roller bearings and mechanical seamless steel tubing, with a workforce of 26,000 across 26 countries.

Trust and Quality
The IsoClass™ brand reflects Timken's dedication to quality and trust, supported by its role in establishing ISO standards for metric bearings. Timken's products are known for their reliability, as evidenced by numerous customer certifications and quality awards.

Global Manufacturing and Distribution
Timken invests over $60 million annually in its global technology organization to maintain product quality and consistency. Its global distribution network ensures timely delivery and responsiveness to customer needs.

Performance and Customization
Timken IsoClass bearings are made from high-quality steel to meet strict material requirements. The company offers over 180 IsoClass part numbers and collaborates with customers to create custom solutions, including special materials and geometries, to meet specific performance needs.

Standard and Modified IsoClass Bearings
The 30000 series bearings are part of the original ISO/R 355 standard. Timken offers more than 180 basic bearings, with modified versions including spacer assemblies and flanged bearings for specific applications.

ISO Standards
The ISO 355 standard specifies dimensions and cup angles for single-row tapered roller bearings. Timken maintains existing designation codes to avoid conversion costs for manufacturers and users.

Technical Specifications
The document provides detailed tables of IsoClass bearings, including dimensions, load ratings, and other technical specifications, showcasing Timken's extensive product offerings.

Specifications
The document lists various bearings with base part numbers, ISO 355 references, and detailed measurements such as cone bore, cup outer diameter, bearing width, cone width, cup width, maximum shaft fillet radius, and housing backing shoulder diameter, crucial for compatibility and performance.

Load Ratings and Factors
Each bearing has a load rating based on 1 x 10⁶ revolutions L10 life for the ISO life calculation method. Rating factors and weight are provided for each bearing, essential for determining suitability for different operational conditions.

Additional Information
The document notes that the maximum fillet radius will be cleared by the bearing corners, ensuring proper fit and function. For further details, readers are directed to contact their local Timken representative or visit the Timken website.

Company Information
Timken is a registered trademark of The Timken Company, specializing in bearings, steel, precision components, lubrication, seals, remanufacture and repair, and industrial services.