7221 BECBM
Single Row Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Outer Ring Dimensions
Performance
Materials
Environment & Compliance
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7221 BECBM Bearing Product Overview & Core Advantages
The 7221 BECBM is a single row angular contact ball bearing designed for applications requiring high precision and the ability to handle combined loads. This metric bearing features a 40° contact angle, optimized for supporting significant axial loads in one direction alongside radial loads. Its P6 (ABEC-3) tolerance class ensures high running accuracy, making it suitable for demanding, high-reliability machinery. The combination of a brass cage and superior chrome steel construction contributes to its robust performance in high-speed applications.
7221 BECBM Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7 | Bearing Series: Angular Contact Ball Bearing |
| 221 | Bore Dimension Code: 105 mm |
| BE | Design: 40° Contact Angle, High Capacity |
| C | Clearance: Normal Internal Clearance |
| BM | Lubrication: Factory lubricated |
7221 BECBM Bearing Structural Features & Performance Benefits
Optimized Contact Angle & Load Capacity: The 40° contact angle is engineered to handle substantial axial loads in one direction, making it ideal for applications with defined thrust directions. The radial dynamic load rating of 35,100 lbf and static load rating of 33,750 lbf demonstrate its robust construction for combined loads.
High-Speed Capability: The brass cage (Cage material: Brass) provides excellent dimensional stability and strength at high rotational speeds, contributing to the bearing's limiting speed of 5,300 rpm.
Precision & Rigidity: Manufactured to a P6 (ABEC-3) tolerance class, this bearing ensures high running accuracy and smooth operation. The defined shoulder diameters on both the inner and outer rings (e.g., Inner ring large-side shoulder diameter: 137.95 mm) ensure precise axial location and contribute to overall system rigidity.
Durability & Compliance: Constructed from chrome steel for both rings and balls, the bearing offers high wear resistance and a long service life. It is compliant with ROHS and REACH environmental standards.
7221 BECBM Bearing Typical Application Areas
The 7221 BECBM is ideally suited for high-performance industrial applications, including:
- Machine Tool Spindles
- Pumps and Compressors
- Gearboxes and Power Transmission Systems
- Precision Agricultural Machinery
- Material Handling Equipment
