MR63
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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MR63 Bearing Product Overview & Core Advantages
The MR63 metric ball bearing is a precision-engineered single row deep groove ball bearing designed for applications demanding compact dimensions and reliable performance. Its primary characteristic is its ability to efficiently support radial loads while operating at high speeds. Manufactured to ABEC1 precision class standards, this bearing offers an excellent balance of performance and value, making it suitable for high-reliability applications where space is limited and consistent operation is critical.
MR63 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| MR | Miniature Bearing Series |
| 6 | Deep Groove Ball Bearing Type |
| 3 | Bore Diameter Code (3mm) |
| (No Suffix) | Open (Unsealed) Construction |
MR63 Bearing Structural Features & Performance Benefits
Compact & Lightweight Design: With ultra-compact bearing dimensions of 3mm bore, 6mm OD, and 2mm width, and a weight of just 0.2g, the MR63 is engineered for space-constrained miniature applications.
High-Speed Capability: Featuring a stainless steel cage and optimized internal geometry, this bearing achieves a limiting speed of 71,000 rpm, making it suitable for high-speed miniature motors and spindles.
Precision Performance: Manufactured to ABEC1 tolerance class with controlled radial internal clearance (MC3 group: 0.002mm to 0.013mm), ensuring smooth and precise operation with minimal vibration.
Durable Construction: Utilizes chrome steel rings and chrome steel balls for excellent wear resistance and fatigue life, providing a dynamic load rating of 40 lbf and static load rating of 13 lbf.
MR63 Bearing Typical Application Areas
The MR63 miniature bearing is ideally suited for:
- Small Precision Motors (DC motors, stepper motors)
- Medical Devices & Instrumentation (surgical tools, dental handpieces)
- Office Automation Equipment (printers, scanners, copiers)
- Robotics & Automation (small robotic joints, actuators)
- Precision Mechanical Systems (optical instruments, measuring devices)
