6408 Deep Groove Ball Bearing For Higher Load Capacity & Medium-Speed Industrial Drives | 40×110×27 mm
The 6408 is a Standard Open Deep Groove Ball Bearing from the robust 64 series, engineered to deliver increased load carrying capacity for medium to large frame industrial equipment. Its open configuration provides maximum design flexibility, enabling integration with custom sealing arrangements or existing lubrication systems. With a 40 mm bore, 110 mm outer diameter, and 27 mm width, this bearing is widely specified in heavier electric motors, industrial pumps, gearboxes, and processing machinery where reliable performance under substantial loads is required.
6408 Deep Groove Ball Bearing 40×110×27 mm | ISO 64 Series – Heavy Duty | Open Design (No Seals/Shields)
Utilizing an optimized deep groove raceway design, the 6408 accommodates smooth, high-speed rotation with a limiting speed of up to 8,000 r/min (Oil). It delivers exceptional load handling capability, with a dynamic load rating of 65.5 kN, making it suitable for demanding continuous operation in 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.

A trusted component across heavy industries and general machinery, valued for its enhanced load capacity, speed versatility, and design adaptability.
With its robust 40×110×27 mm envelope and precision-engineered internal geometry, the 6408 delivers an impressive dynamic load rating of 65.5 kN and static load rating of 37.5 kN, ensuring reliable performance under continuous heavy loads and occasional shock loading in demanding industrial applications.
Manufactured from high-grade chrome steel with precision-ground raceways and balls, the 6408 guarantees consistent low-friction operation, minimizing vibration and energy loss while delivering quiet, efficient performance across its entire speed range.
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.
| Bearing Type | Single Row Deep Groove Ball Bearing |
| ISO Dimension Series | 64 Series – Heavy Duty |
| Basic Designation | 6408 |
| Suffix | Open (No seal/shield suffix) |
| Bore Diameter (d) | 40 mm |
| Outer Diameter (D) | 110 mm |
| Width (B) | 27 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) | 65.5 kN |
| Static Load Rating (C₀ʳ) | 37.5 kN |
| Limiting Speed (Grease) | 6,300 r/min |
| Limiting Speed (Oil) | 8,000 r/min |
| Weight (approx.) | 1.22 kg |
This bearing conforms to international dimensional standards and is directly interchangeable with all major bearing manufacturers:
The standard 6408 is supplied as an open bearing. For applications requiring built-in contamination protection, sealed variants such as 6408-2RS (double rubber seals) or shielded variants such as 6408-ZZ (double metal shields) are available as alternative configurations from stock.
"As a key member of the 64 series, the 6408 deep groove ball bearing represents the next step up in load capacity for engineers designing medium to heavy industrial machinery, pumps, and drive systems where reliable performance and design flexibility are essential."
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