SMR74 2rs
SMR Series Stainless Steel Miniature Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Ball & Washer Dimensions
Performance
Materials
Environment & Compliance
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SMR74 2rs Bearing Product Overview & Core Advantages
The SMR74 2rs is a miniature deep groove ball bearing engineered for precision applications requiring compact design and reliable performance. Constructed entirely from stainless steel (rings, balls, and cage) and featuring integral rubber seals (2rs), this bearing is designed to handle radial loads effectively in demanding environments. Its key advantages include excellent corrosion resistance, a sealed design for contamination protection, and suitability for high-speed operation up to 54,000 rpm, making it an ideal choice for applications where space is limited and reliability is critical.
Model Code In-Depth Analysis
- SMR74: Denotes the bearing series, indicating a miniature metric deep groove ball bearing with a 4mm bore, 7mm OD, and 2.5mm width.
- 2rs: Indicates the bearing is equipped with two rubber contact seals (one on each side). The "rs" suffix signifies a nitrile rubber seal that provides effective protection against contaminants and retains lubricant.
SMR74 2rs Bearing Structural Features & Performance Benefits
Stainless Steel Construction: All critical components, including the inner ring, outer ring, balls, and cage, are manufactured from stainless steel. This provides superior corrosion resistance, making the bearing suitable for applications exposed to moisture, chemicals, or washdown environments.
Robust Sealing: The double-sided rubber contact seals (2rs) effectively shield the internal bearing components from dust, dirt, and other contaminants while retaining the pre-applied lubricant. This enhances bearing life and ensures consistent performance.
High-Speed Capability: The precision stainless steel cage and optimized internal geometry contribute to stable operation at limiting speeds of 54,000 rpm, which is essential for miniature high-speed machinery.
Radial Load Capacity: With a dynamic load rating of 44 lbf and a static load rating of 17 lbf, this bearing is designed to handle significant radial loads for its compact size.
SMR74 2rs Bearing Typical Application Areas
The SMR74 2rs is widely used in precision instruments and compact mechanisms, including:
- Small Precision Motors and stepper motors
- Medical Devices and dental handpieces
- Office Automation Equipment such as printers and scanners
- Radio Control Models and drones
- Instrumentation and measuring devices
