NACHI 22320EXQKW33C3 Spherical Roller Bearing

NACHI 22320EXQKW33C3 Spherical Roller Bearing

The NACHI 22320EXQKW33C3 is a precision spherical roller bearing with tapered bore (1:12), featuring a bore diameter of 100 mm, outer diameter of 215 mm, and width of 73 mm. Spherical roller bearings are designed to accommodate heavy combined radial and axial loads while allowing angular misalignment between the shaft and housing – making them ideal for applications where shaft deflection, mounting errors, or thermal distortion are expected.

Design & Construction

Manufactured by NACHI (a division of Fujikoshi Corporation, Japan), the 22320EXQKW33C3 features a tapered bore (1:12 taper ratio) designed for mounting on tapered adapter or withdrawal sleeves. The bearing incorporates two rows of barrel-shaped rollers running on a common spherical outer raceway, which provides the self-aligning capability. Rings and rollers are precision-ground from high-carbon chromium bearing steel (AISI 52100 / JIS SUJ2), heat-treated to achieve optimum hardness and fatigue life. The W33 designation indicates factory-machined oil supply holes and an annular groove on the outer ring, enabling efficient forced-oil or circulating-oil lubrication systems. C3 internal radial clearance (greater than Normal/CN) provides additional operating clearance to accommodate thermal expansion, misalignment, and interference fits commonly encountered in heavy-duty applications. These bearings can also be sourced without the W33 oil holes and are available in standard CN (Normal) clearance — please contact us if you require an alternative specification.

Performance

Rated for a basic dynamic load capacity of 975.0 kN and a static load capacity of 875.0 kN, this bearing delivers robust performance under heavy combined loads and demanding operating conditions. Permissible speeds reach 2,000 rpm with grease lubrication and 2,800 rpm with oil lubrication. The self-aligning design tolerates angular misalignment of up to approximately 1-2 degrees, ensuring reliable operation even when precise shaft-to-housing alignment cannot be maintained.

Typical Applications

• Mining, quarrying, and mineral processing equipment
• Heavy-duty gearboxes, reducers, and power transmission
• Paper and pulp machinery
• Steel mill and continuous casting equipment
• Crushers, screens, and vibrating equipment
• Large fans and blowers
• Construction and earthmoving machinery
• Wind turbine main shafts and gearboxes
• Marine propulsion and deck equipment
• Plummer block and split housing assemblies