7405 BM
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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7405 BM Bearing Product Overview & Core Advantages
The 7405 BM is a single row angular contact ball bearing engineered for high-performance applications requiring exceptional precision and reliability. This metric bearing is designed to accommodate combined loads, primarily handling significant axial loads in one direction while also supporting substantial radial loads. Its optimized 40° contact angle provides superior axial rigidity, making it an ideal choice for high-speed spindles and precision machinery. Manufactured to a P6 (ABEC-3) tolerance class, it ensures consistent, high-accuracy operation. The open design, combined with a robust brass cage, facilitates effective lubrication management and stable performance at the limiting speed of 15,000 rpm.
7405 BM Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning | Significance |
|---|---|---|
| BM | Brass Cage, Machined | Indicates the use of a high-strength, machined brass cage. This construction offers excellent dimensional stability, low wear, and is well-suited for high-speed applications and demanding operating conditions. |
7405 BM Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The single row design with a 40° contact angle is optimized to handle high axial loads and combined loads efficiently. The calculated distance from side face to load point (33 mm) contributes to stable moment load support.
- Precision Engineering: Manufactured to P6 (ABEC-3) tolerance class with tight dimensional controls on the bore, outside diameter, and width, ensuring predictable performance and ease of integration into precision assemblies.
- High-Speed Capability: The combination of the machined brass cage (BM) and the open design allows for efficient lubrication and heat dissipation, enabling reliable operation up to the specified limiting speed.
- Robust Material Construction: Rings and balls made from chrome steel provide high load ratings (Radial Dynamic: 8932 lbf, Static: 5310 lbf) and excellent durability, ensuring a long service life under strenuous conditions.
7405 BM Bearing Typical Application Areas
The 7405 BM angular contact ball bearing is specifically suited for high-demand sectors, including:
- Machine Tool Spindles
- High-Speed Pumps and Compressors
- Precision Gearboxes
- Agricultural and Construction Machinery
- Material Handling Equipment
