7208 BECBM
Single Row Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Outer Ring Dimensions
Performance
Materials
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7208 BECBM Bearing Product Overview & Core Advantages
The **7208 BECBM** is a **precision angular contact ball bearing** designed for high-performance applications requiring exceptional **rotational accuracy** and **rigidity**. As a **single row** metric bearing with **P6 (ABEC-3) tolerance class**, it delivers superior running precision. Its defining **40° contact angle** enables it to support significant **combined loads**—handling both radial and substantial axial loads in one direction simultaneously. This makes it an ideal component for **high-speed spindles** and other demanding machinery where **high rigidity** and **reliable performance** are critical. The open design, when properly lubricated, allows for operation at a limiting speed of **13,000 rpm**.
7208 BECBM Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7208 | Basic Bearing Series & Size Code | Indicates a medium-duty angular contact bearing series with a 40mm bore, 80mm OD, and 18mm width. |
| BE | 40° Contact Angle Designation | Specifies the optimized **contact angle** for high axial load capacity and **high rigidity**. |
| CBM | Enhanced Brass Cage & Lubrication | Denotes a **brass cage** for superior guidance and stability at **high speeds**, and that the bearing is supplied pre-lubricated. |
7208 BECBM Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The **single row design** with a steep **40° contact angle** provides high resistance to deflection under load. It efficiently supports **combined radial and axial loads**, with a dynamic load rating of 8212 lbf and static load rating of 5850 lbf.
- Optimized for High-Speed Operation: The combination of the precision-ground **chrome steel** rings and balls, along with the robust **brass cage (CBM)**, ensures smooth operation and low vibration at the high limiting speed of 13,000 rpm.
- Precision Engineering: Manufactured to **P6 (ABEC-3) tolerance class** with tight dimensional tolerances on the **bore diameter**, **outside diameter**, and **width**, guaranteeing consistent performance and ease of installation in precision assemblies.
- Wide Operating Temperature Range: Constructed from high-grade chrome steel, the bearing is suitable for a temperature range from -30°C to 110°C.
7208 BECBM Bearing Typical Application Areas
The 7208 BECBM is engineered for high-demand applications across various industries, including:
- Machine Tool Spindles: For CNC machining centers, grinders, and lathes requiring **high speed** and **high rigidity**.
- Precision Gearboxes: Especially in applications where precise shaft positioning and load capacity are critical.
- High-Frequency Motors and Spindles: Used in electric motors and high-speed spindles for PCB drilling, dental handpieces, and small tooling.
- Pumps and Compressors: Where reliable performance under combined loads is essential.
