MR105
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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MR105 Bearing Product Overview & Core Advantages
The MR105 is a metric single row deep groove ball bearing engineered for high performance in compact spaces. Designed primarily to accommodate radial loads, it features a standard open design that facilitates easy re-lubrication and maintenance. Manufactured from high-grade chrome steel for both rings and balls, with a durable stainless steel cage, this bearing offers reliable operation and extended service life. Its ABEC1 precision class and controlled MC3 radial internal clearance ensure smooth, consistent performance, making it an excellent choice for applications demanding high rotational accuracy and reliability.
MR105 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| MR105 | Standard model number for a metric, single row deep groove ball bearing with a 5mm bore, 10mm OD, and 3mm width. |
| Open (Seal Type) | No integral seals or shields. This allows for higher limiting speeds and easy access for lubrication, but requires a clean operating environment or external sealing. |
| MC3 (Radial Clearance) | Specifies a MC3 radial internal clearance group (0.002mm to 0.013mm), which is a standard clearance suitable for most common operating conditions. |
| ABEC1 | Indicates the tolerance class, defining the precision of the bearing's dimensional and running accuracy to a standard industrial grade. |
MR105 Bearing Structural Features & Performance Benefits
- Optimized Deep Groove Raceway: The deep groove geometry of both inner and outer rings enables efficient handling of radial loads and moderate axial loads in both directions.
- High-Speed Capability: The combination of an open design, a lightweight stainless steel cage, and precision grinding allows for a high limiting speed of 50,000 rpm, making it suitable for high-rotation applications.
- Robust Construction: Components made from chrome steel provide high hardness and wear resistance, while the stainless steel cage offers excellent corrosion resistance and strength.
- Precision Performance: Manufactured to ABEC1 tolerances with controlled radial internal clearance, this bearing ensures low vibration and noise for smooth operation.
- Compliance & Versatility: Compliant with ROHS and REACH directives, and operates effectively within a temperature range of -30°C to 110°C.
MR105 Bearing Typical Application Areas
The MR105 ball bearing is ideally suited for a wide range of small, high-speed machinery and precision instruments, including:
- Small electric motors and precision spindles
- Office automation equipment (e.g., printers, scanners)
- Medical and dental handpieces
- Robotic joints and small gearboxes
- Radio-controlled models and drones
- Precision instruments and measuring devices
