MR41x
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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MR41x Bearing Product Overview & Core Advantages
The MR41x is a miniature metric ball bearing designed for precision applications requiring compact dimensions and reliable performance. As a single row deep groove ball bearing, it excels at handling primarily radial loads while also accommodating moderate axial loads in both directions. Its construction from high-grade chrome steel and a stainless steel cage ensures durability and smooth operation, making it an ideal component for high-speed, small-scale mechanisms where space is at a premium and precision is paramount.
MR41x Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| MR41x | Denotes the bearing series with a 1.2mm bore, 4mm outside diameter, and 1.8mm width. |
| Open (Seal Type) | Indicates the bearing is unsealed, allowing for custom lubrication schemes but requiring a clean operating environment. |
| ABEC1 | Specifies the tolerance class, defining standard precision levels for runout and dimensional accuracy. |
| MC3 | Indicates the radial internal clearance group (0.002mm to 0.013mm), suitable for general operating conditions. |
MR41x Bearing Structural Features & Performance Benefits
Compact & Lightweight Design: With dimensions of 1.2mm (bore) x 4mm (OD) x 1.8mm (width) and a weight of just 0.11 grams, this bearing is engineered for applications with severe space and weight constraints.
High-Speed Capability: The combination of a stainless steel cage and optimized internal geometry enables a high limiting speed of 105,000 rpm, making it suitable for demanding high-velocity operations.
Robust Load Capacity: Manufactured from chrome steel for both rings and balls, it offers a dynamic load rating of 25 lbf and a static load rating of 7 lbf, providing reliable performance under radial stresses.
Precision Engineering: Built to ABEC1 tolerance class and featuring controlled radial internal clearance, this bearing ensures consistent, low-vibration operation essential for precision instruments.
MR41x Bearing Typical Application Areas
- Miniature DC Motors & Precision Gearboxes
- Medical Devices & Surgical Hand Tools
- Optical Encoders & Laboratory Instrumentation
- Small Drones & RC Model Components
- Office Automation Equipment (e.g., printers, scanners)
