MR72 2rs
MR Series Miniature Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Ball & Washer Dimensions
Performance
Materials
Environment & Compliance
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MR72 2rs Bearing Product Overview & Core Advantages
The MR72 2RS is a miniature sealed deep groove ball bearing engineered for applications demanding high precision and reliability in compact spaces. This metric single row bearing features integral rubber seals (2RS) on both sides, providing excellent protection against contaminants while retaining lubrication. Its design is optimized to handle primarily radial loads efficiently. Constructed from high-grade chrome steel for rings and balls, it ensures durability and consistent performance, making it an ideal choice for high-speed, small-scale mechanisms requiring long-term, maintenance-free operation.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| MR72 | Denotes the bearing series and size. A miniature bearing with a 2mm bore, 7mm outside diameter, and 3mm width. |
| 2RS | Indicates the bearing is fitted with Nitrile Rubber Contact Seals on both sides. This provides superior sealing effectiveness compared to non-contact shields, protecting against dust and moisture and retaining lubricant for extended service life. |
MR72 2rs Bearing Structural Features & Performance Benefits
Robust Sealed Construction: The double-sided Nitrile Rubber (2RS) seals ensure the bearing is well-protected in harsh environments, making it effectively maintenance-free by preventing lubricant leakage and contaminant ingress.
High-Speed Capability: With a limiting speed of 63,000 rpm and a stainless steel cage to guide the 7 high-precision chrome steel balls, this bearing offers smooth and stable operation at high rotational velocities.
Precision and Load Capacity: Manufactured to ABEC1 tolerance class with a controlled radial internal clearance (MC3 group), it provides reliable and precise running. The radial dynamic load rating of 74 lbf ensures it can handle significant loads for its compact bearing dimensions.
Wide Operating Range: The standard lubrication and material selection allow for a temperature range of -30°C to 110°C, suiting various operational environments.
MR72 2rs Bearing Typical Application Areas
The MR72 2RS is ideally suited for compact, high-speed devices across multiple industries, including:
- Small Precision Motors and stepper motors
- Medical Devices and dental handpieces
- Office Automation Equipment such as printers and scanners
- Instrumentation and optical encoders
- Robotics and miniature gearboxes
