MR115zz
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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Product Overview and Core Advantages
The MR115zz is a metric single row deep groove ball bearing designed for precision applications requiring reliable performance in compact spaces. This shielded bearing offers excellent radial load capacity and smooth operation. Its compact dimensions (5mm bore, 11mm OD, 4mm width) make it ideal for applications where space is limited but high reliability is essential. Manufactured to ABEC1 precision standards, this bearing ensures consistent performance in various industrial and precision mechanical applications.
MR115zz Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Benefit |
| MR115 | Standard metric bearing designation indicating 5mm bore diameter, 11mm outside diameter, and 4mm width | Compact size for space-constrained applications |
| zz | Double shielded construction on both sides | Enhanced contamination protection and extended service life |
Structural Features and Performance Advantages
Deep Groove Geometry: The optimized raceway design enables excellent radial load capacity (137 lbf dynamic, 51 lbf static) while accommodating minor axial loads.
Shielded Protection: Double stainless steel shields (300 series) provide effective contamination protection while maintaining low friction operation.
Precision Construction: Manufactured with chrome steel rings and balls combined with a stainless steel cage, ensuring dimensional stability and corrosion resistance.
High-Speed Capability: With a limiting speed of 45,000 rpm, this bearing is suitable for high-speed applications requiring reliable performance.
Controlled Internal Clearance: MC3 radial internal clearance (0.002mm to 0.013mm) provides optimal fit for various operating conditions.
MR115zz Bearing Typical Application Areas
- Small Precision Motors: Ideal for miniature DC motors and stepper motors requiring compact bearing solutions
- Office Equipment: Printers, scanners, and copiers where reliable rotational performance is critical
- Medical Devices: Small medical instruments and laboratory equipment requiring precision movement
- Robotics and Automation: Small joints, actuators, and positioning mechanisms in compact robotic systems
- Consumer Electronics: Cooling fans, small drives, and precision mechanisms in electronic devices
- Instrumentation: Precision measuring devices and optical equipment requiring smooth, low-friction rotation
