UNKNOWN NTN 6221C3 BEARING

Description:

The Unknown NTN 6221C3 Bearing is used in industrial power transmission and rotating equipment to support radial and axial loads while providing smooth, low-friction operation. Commonly installed in electric motors, pumps, gearboxes, compressors, conveyors, and manufacturing machinery requiring reliable high-speed bearing performance. Maintenance teams, OEMs, and system integrators use this bearing for repair, retrofit, expansion, or replacement of existing rolling element bearings.

Applications:

The Unknown NTN 6221C3 Bearing is used in industrial applications requiring high-speed rotation and dependable load carrying capability. It is commonly found in electric motors, fans, pumps, compressors, conveyor systems, agricultural machinery, and industrial gearboxes where low friction, long service life, and resistance to operating temperature variations are essential. The C3 internal clearance provides greater radial clearance than standard bearings, making it suitable for applications with thermal expansion or higher operating speeds.

Technical Specifications:

• Manufacturer: Unknown / NTN
• Part Number: 6221C3
• Product Type: Deep Groove Ball Bearing
• Bearing Series: 62 Series
• Bearing Design: Single Row Deep Groove
• Bore Diameter (ID): 105 mm
• Outside Diameter (OD): 190 mm
• Width: 36 mm
• Internal Clearance: C3 (Greater than Normal)
• Closure Type: Open
• Cage Material: Pressed Steel
• Bearing Material: High Carbon Chrome Steel
• Dynamic Load Rating: 147 kN
• Static Load Rating: 105 kN
• Fatigue Limit Load: 6.75 kN
• Maximum Speed (Grease): 3,400 RPM
• Maximum Speed (Oil): 4,000 RPM
• Operating Temperature: -40°C to +120°C
• Minimum Fillet Radius: 2.1 mm
• Weight: Approximately 3.7 kg
• ISO Precision Class: Class 0 (ABEC 1 Equivalent)
• Suitable for High-Speed and Continuous Duty Industrial Applications

Common Replacements:

• SKF 6221/C3 Deep Groove Ball Bearing
• FAG 6221-C3 Deep Groove Ball Bearing
• Timken 6221 C3 Deep Groove Ball Bearing