NACHI 6840 Deep Groove Ball Bearings

NACHI 6840 Deep Groove Ball Bearings

The NACHI 6840 is a high-quality single-row deep groove ball bearing engineered to deliver reliable performance across a broad spectrum of industrial and commercial applications. With a bore diameter of 200 mm, outer diameter of 250 mm, and a width of 24 mm, this bearing conforms to ISO dimension standards and is a direct interchange for equivalent series bearings from other manufacturers.

Design & Construction

Manufactured by NACHI – one of Japan’s leading bearing producers – the 6840 is precision-ground from high-carbon chromium bearing steel (AISI 52100 / JIS SUJ2), heat-treated to achieve optimum hardness and fatigue resistance. The deep raceway grooves in both the inner and outer rings enable the bearing to support radial loads as well as moderate axial loads in either direction. Open design with no seals or shields, allowing free Oil and Grease flow and easy re-lubrication in service.

Performance

Rated for a basic dynamic load capacity of 74.0 kN and a static load capacity of 91.0 kN, this bearing delivers dependable load-carrying ability and long calculated service life under correct operating conditions. Permissible speeds reach 2,300 rpm with grease lubrication and 2,700 rpm with oil lubrication, making it well suited to high-speed rotating equipment. Supplied with standard CN internal clearance, this bearing is suited to the widest range of general-purpose applications.

Typical Applications

• Electric motors, generators, and alternators
• Pumps, compressors, and blowers
• Conveyor and material-handling systems
• Agricultural and farming equipment
• Power tools and woodworking machinery
• Automotive ancillaries – water pumps, tensioners, idlers
• HVAC fans, air-conditioning units, and refrigeration
• Food and beverage processing machinery
• Gearboxes, reducers, and transmission assemblies
• General industrial and workshop machinery