SMF74
SMF Series Stainless Steel Flanged Miniature Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Outer Ring Dimensions
Ball & Washer Dimensions
Performance
Materials
Environment & Compliance
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SMF74 Bearing Product Overview & Core Advantages
The SMF74 is a miniature deep groove ball bearing engineered for applications demanding compact size, reliable performance, and corrosion resistance. Constructed entirely from stainless steel, this single-row, open-type bearing is designed to handle primarily radial loads and is an ideal solution for high-speed, low-torque operations. Its ABEC1 precision class and standardized internal clearance ensure consistent performance in precision instruments and small mechanisms.
SMF74 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| SMF74 | Standard Bearing Designation | Indicates a specific series of miniature metric bearings. |
| Open (Seal Type) | No integral seals or shields | Allows for higher limiting speeds and custom lubrication schemes. Requires a clean operating environment. |
| MC3 | Radial Internal Clearance Group | Specifies a standard clearance range (0.002mm to 0.013mm) suitable for most general applications. |
SMF74 Bearing Structural Features & Performance Benefits
Compact & Lightweight Design: With dimensions of just 4mm (bore) x 7mm (OD) x 2mm (width) and a weight of only 0.3g, the SMF74 is optimized for space-constrained applications without sacrificing performance.
High-Speed Capability: The open design and optimized geometry contribute to a high limiting speed of 54,000 rpm, making it suitable for demanding high-speed operations.
Corrosion Resistance: All components, including the rings, balls, and cage, are manufactured from stainless steel, providing excellent resistance to corrosion and enabling use in harsh environments.
Precision Performance: Manufactured to ABEC1 tolerance standards, this bearing ensures smooth, low-vibration, and low-noise operation, which is critical for sensitive electronic and mechanical systems.
SMF74 Bearing Typical Application Areas
- Small Precision Motors (e.g., in drones, RC models)
- Medical and Dental Handpieces
- Office Automation Equipment (printers, scanners)
- Instrumentation and Measurement Devices
- High-Speed Spindles in miniature machinery
