Guide to Timken 30209 Tapered Roller Bearings

When equipment requires high radial load capacity combined with moderate axial load handling, tapered roller bearings often emerge as the optimal solution. Among these, the Timken 30209 metric tapered roller bearing stands out for its exceptional performance and reliability across numerous industrial applications.

The "30209" designation contains essential technical information when broken down:

• 3: Identifies the bearing as a tapered roller type
• 02: Indicates a light series bearing, featuring compact dimensions relative to its bore size for space-constrained applications
• 09: Specifies the bore diameter, with 09 corresponding to 45mm

Key dimensional parameters for the Timken 30209 bearing include:

• Bore diameter (d): 45mm
• Outside diameter (D): 85mm
• Width (B): 20.75mm

These measurements determine mechanical compatibility with equipment. Engineers must verify these dimensions against available installation space and shaft specifications to ensure proper fit and operation.

The bearing's load-bearing characteristics include:

• Dynamic load rating (Cr): 94.8 kN
• Static load rating (C0r): 89 kN

The dynamic rating reflects the bearing's capacity under rotational conditions, while the static rating applies to stationary applications. Exceeding these ratings risks premature bearing failure, making accurate load calculations essential during selection.

Additional technical characteristics include:

• Cage type: Steel construction for enhanced durability and precise roller positioning
• Sealing: Open design suitable for lubrication requirements
• Clearance: Standard internal clearance for general applications

These seemingly minor specifications significantly influence operational performance and service life.

The Timken 30209 serves critical functions across multiple sectors:

• Automotive: Wheel hub assemblies, differential components
• Industrial machinery: Gearboxes, speed reducers, pumps, compressors
• Agricultural equipment: Tractors, combine harvesters
• Construction machinery: Excavators, loaders

Proper bearing selection requires thorough evaluation of dimensional specifications, load requirements, and operational conditions to ensure optimal equipment performance and longevity.