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64 Series
Home Deep Groove Ball Bearings 64 Series

6409 Deep Groove Ball Bearing For High Load Demands And Long Service | 45x120x29 mm

6409 Deep Groove Ball Bearing For High Load Demands And Long Service | 45x120x29 mm

The 6409 is a Standard Open Deep Groove Ball Bearing from the heavy-duty 64 series, engineered to accommodate substantial radial loads and moderate axial loads in both directions for larger industrial equipment. Its open configuration provides maximum design flexibility, enabling seamless integration with custom sealing arrangements or existing lubrication systems. With a 45 mm bore, 120 mm outer diameter, and 29 mm width, this bearing is commonly specified in larger electric motors, industrial pumps, gearboxes, and processing machinery where reliable performance under increased loads is essential.

6409 Deep Groove Ball Bearing 45×120×29 mm | ISO 64 Series – Heavy Duty | Open Design (No Seals/Shields)

Featuring an optimized deep groove raceway geometry, the 6409 supports smooth, high-speed rotation with a limiting speed of up to 7,000 r/min (Oil). It delivers substantial load carrying capacity, with a dynamic load rating of 77.5 kN, making it suitable for demanding continuous operation in heavy industrial environments. The open design facilitates direct relubrication and allows engineers to implement application-specific sealing solutions tailored to particular operating conditions, ensuring extended service life across diverse applications.

6409 Deep Groove Ball Bearing For Higher Load Demands & Extended Service Life | 45×120×29 mm

Comprehensive Applications

A reliable component across heavy industries and large machinery, valued for its enhanced load capacity, speed versatility, and design adaptability.

Power Transmission & Industrial Equipment
  • Heavy industrial gear drives and speed reducers
  • Large frame electric motors and generators
  • Industrial centrifugal pumps and process pumps
  • Heavy-duty compressors and blowers
Processing & Manufacturing Machinery
  • Machine tool main spindles and auxiliary drives
  • Paper mill rollers and converting equipment
  • Rubber and plastics processing machinery
  • Textile manufacturing and finishing equipment
Material Handling & Heavy Machinery
  • Heavy-duty conveyor systems and pulley blocks
  • Overhead cranes and hoisting equipment
  • Construction machinery auxiliary systems
  • Aggregate and mining equipment drives
Industrial Vehicles & Power Generation
  • Commercial vehicle auxiliary transmissions
  • Industrial generator sets and power units
  • Pump drives for mobile hydraulic systems
  • Off-highway equipment auxiliary drives

Key Performance Features

01. Open Configuration for Maximum Design Flexibility

The absence of integral seals or shields allows seamless integration into custom housings, facilitates direct relubrication for extended service life, and enables pairing with application-specific external sealing solutions tailored to diverse operating environments.

02. Precision-Ground for Low Noise & Minimal Vibration

Manufactured from high-grade chrome steel with precision-ground raceways and balls, the 6409 guarantees consistent low-friction operation, minimizing vibration and energy loss while delivering quiet, efficient performance across its entire speed range.

03. Substantial Load Capacity & Long Service Life

With its robust 45×120×29 mm envelope and precision-engineered internal geometry, the 6409 delivers an impressive dynamic load rating of 77.5 kN and static load rating of 45.5 kN, ensuring reliable performance under continuous heavy loads and occasional shock loading in demanding industrial applications.

Technical Specifications

Bearing Type Single Row Deep Groove Ball Bearing
ISO Dimension Series 64 Series – Heavy Duty
Basic Designation 6409
Suffix Open (No seal/shield suffix)
Bore Diameter (d) 45 mm
Outer Diameter (D) 120 mm
Width (B) 29 mm
Material (Races & Balls) Chrome Steel (GCr15 / SAE 52100)
Precision Class Standard / P5 Grade Available
Cage Material Steel Stamped (Standard), Nylon Also Common
Dynamic Load Rating (Cʳ) 77.5 kN
Static Load Rating (C₀ʳ) 45.5 kN
Limiting Speed (Grease) 5,600 r/min
Limiting Speed (Oil) 7,000 r/min
Weight (approx.) 1.52 kg

Interchange Part Numbers

This bearing conforms to international dimensional standards and is directly interchangeable with all major bearing manufacturers:

  • SKF: 6409
  • NSK: 6409
  • FAG: 6409
  • NTN: 6409
  • KOYO: 6409
  • Timken: 6409

Design & Configuration

The standard 6409 is supplied as an open bearing. For applications requiring built-in contamination protection, sealed variants such as 6409-2RS (double rubber seals) or shielded variants such as 6409-ZZ (double metal shields) are available as alternative configurations from stock.

"As a higher capacity member of the 64 series, the 6409 deep groove ball bearing is the preferred choice for engineers designing larger industrial machinery, pumps, and drive systems where increased load handling and reliable performance are paramount."

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