NACHI STR-ID SPHERICAL ROLLER BEARINGS NAC 21309-EXQW-33-C-3
Double-rowed spherical roller bearings are the workhorse of the industry. Their barrel shaped rollers and spherical outer ring raceway permits this bearing to operate with misalignment with no reduction in bearing life. Spherical roller bearings are used mostly in heavy duty industrial applications where extreme radial loads exist. They also excel in handling axial loads in either direction, contaminated environments, misalignment, shock loads and vibration. Nachi Sphericals are manufactured in a number of design and material configurations depending upon the type of application and the size of the bearing. Most come standard with a lubrication groove and holes (W33) on the OD of the outer ring. Symmetrical or Asymmetrical (A) rollers may be used with stamped steel or machined brass cages. The "EX" design uses larger diameter rollers for the highest load ratings. All bearings are heat stabilized to at least 200 deg C (about 400 deg F). Some sizes may be available with tapered bores (K). Depending upon design, stamped steel or machined brass cages are used. Commonly used in gearboxes, wind turbines, pumps, mining/construction, marine propulsion and drilling equipment.
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BrandNACHI
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Manufacturer Part Number21309EXQW33C3
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CountryUSA
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Load Capacity150000 N Dynamic/124000 N Static
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Cage MaterialPressed Steel
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Temperature Rating400 deg F
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Maximum Speed5500 rpm Grease/6600 rpm Oil
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Closure TypeOpen
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Width25 mm
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Series21300
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Number of Rows2
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Bearing MaterialSteel Alloy
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Outside Diameter100 mm
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Bore Diameter45 mm
- Long life
- Low friction/torque
- Low operating temperature
- Reduced noise and vibration
- Improved roller roundness and raceway accuracy
- Enhanced surface finishes result in improved lube film
- Self-aligning in low and high speed applications
- Press fitting adapter sleeves make internal clearance adjustment
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UNSPSC31171510
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Package DescriptionEACH
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Owners/User Manual
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Double-rowed spherical roller bearings are the workhorse of the industry. Their barrel shaped rollers and spherical outer ring raceway permits this bearing to operate with misalignment with no reduction in bearing life. Spherical roller bearings are used mostly in heavy duty industrial applications where extreme radial loads exist. They also excel in handling axial loads in either direction, contaminated environments, misalignment, shock loads and vibration. Nachi Sphericals are manufactured in a number of design and material configurations depending upon the type of application and the size of the bearing. Most come standard with a lubrication groove and holes (W33) on the OD of the outer ring. Symmetrical or Asymmetrical (A) rollers may be used with stamped steel or machined brass cages. The "EX" design uses larger diameter rollers for the highest load ratings. All bearings are heat stabilized to at least 200 deg C (about 400 deg F). Some sizes may be available with tapered bores (K). Depending upon design, stamped steel or machined brass cages are used. Commonly used in gearboxes, wind turbines, pumps, mining/construction, marine propulsion and drilling equipment.
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• Roller Face Width (C/B): 0.875 in / 7/8" (22.225 mm)
• Stud Fitting Diameter (\(d_{s}\)): 0.625 in / 5/8" (15.875 mm)
• Thread Profile: 5/8-18 UNF
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