R2A
R 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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R2A Bearing Product Overview & Core Advantages
The R2A is a single row deep groove ball bearing designed for exceptional performance in compact spaces. Engineered with precision ABEC1 tolerance, this bearing delivers reliable operation and high rotational accuracy. Its optimized design enables efficient handling of radial loads while maintaining stable performance across a wide temperature range from -86 to 230°F. The open construction allows for flexible lubrication options, making it suitable for various industrial applications requiring consistent performance and durability.
Model Code Detailed Breakdown
| Code Element | Technical Meaning |
| R2A | Standard inch series deep groove ball bearing |
| Open | No seals or shields, allowing for custom lubrication |
| MC3 | Normal radial internal clearance group |
R2A Bearing Structural Features & Performance Benefits
Optimized Load Distribution: Features 7 high-precision chrome steel balls with precise diameter control (0.06252") that ensure smooth load transfer and reduced stress concentrations. The stainless steel cage maintains proper ball spacing for consistent performance at high speeds.
High-Speed Capability: With a limiting speed of 53,000 rpm, the bearing is engineered for demanding applications. The balanced design and quality materials minimize vibration and heat generation during high-speed operation.
Precision Engineering: Manufactured to ABEC1 tolerance standards with tight dimensional control on bore diameter (0.125" ±0.0003"), outside diameter (0.5" ±0.0003"), and width (0.1719" -0.005"/0"). The controlled radial internal clearance (0.00008" to 0.0005") ensures optimal performance under various operating conditions.
Material Excellence: Constructed from chrome steel rings and chrome steel balls for superior wear resistance and durability. The combination provides excellent hardness and fatigue resistance for extended service life.
R2A Bearing Typical Application Areas
- Small precision instruments and measuring devices requiring high rotational accuracy
- Medical equipment components where compact size and reliability are critical
- Office automation equipment including printers, scanners, and copiers
- Electric motors and small power tools demanding high-speed operation
- Robotics and automation systems requiring precise motion control
- Laboratory equipment and analytical instruments
