NACHI 2213K Self-Aligning Ball Bearing

NACHI 2213K Self-Aligning Ball Bearing

The NACHI 2213K is a self-aligning ball bearing with two rows of balls running on a common spherical raceway in the outer ring. With a bore diameter of 65 mm, outer diameter of 120 mm, and a width of 31 mm, this bearing conforms to ISO dimension standards and is a direct interchange for equivalent self-aligning ball bearings from other manufacturers.

Design & Construction

Manufactured by NACHI – one of Japan’s leading bearing producers – the 2213K is precision-ground from high-carbon chromium bearing steel (AISI 52100 / JIS SUJ2), heat-treated to achieve optimum hardness and fatigue resistance. The self-aligning design features a concave outer ring raceway that allows the inner ring, ball complement, and cage to tilt freely relative to the outer ring, compensating for shaft deflection, misalignment of up to 2-3 degrees, and mounting errors without increasing friction or reducing bearing life. The tapered bore (1:12 taper) enables mounting with an adapter sleeve or withdrawal sleeve, greatly simplifying installation and removal – particularly beneficial on plain (non-stepped) shafts or where frequent bearing changes are required.

Performance

Rated for a basic dynamic load capacity of 43.5 kN and a static load capacity of 16.4 kN, this bearing delivers reliable performance under moderate radial and light axial loads. Permissible speeds reach 4,900 rpm with grease lubrication and 5,900 rpm with oil lubrication. The open design allows free oil and grease flow for optimum lubrication and heat dissipation, making this bearing suitable for applications with external lubrication systems, oil bath, or periodic re-greasing.

Typical Applications

• Conveyor and material-handling systems where shaft deflection occurs
• Agricultural and farming equipment subject to rough operating conditions
• Textile and paper mill machinery with long, flexible shafts
• Fans, blowers, and ventilation equipment
• Light-duty gearboxes and transmission assemblies
• Pumps and compressors with potential shaft misalignment
• Woodworking and sawmill equipment
• Food and beverage processing machinery
• Printing and packaging equipment
• General industrial and workshop machinery