R4A
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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R4A Bearing Product Overview & Core Advantages
The R4A is a precision single row deep groove ball bearing designed for reliable performance in demanding applications. Manufactured to ABEC1 tolerance class, it offers excellent dimensional stability and smooth operation. Its open design provides versatility for various lubrication schemes, while its compact inch dimensions make it ideal for applications with space constraints. This bearing is engineered to handle significant radial loads with a dynamic load rating of 446 lbf, ensuring long service life and operational reliability.
R4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| R4A | Standard designation for this specific inch-series deep groove ball bearing |
| Open | No seals or shields, allowing for custom lubrication and high-speed operation |
| MC3 | Normal radial internal clearance group (0.00008" to 0.0005") |
R4A Bearing Structural Features & Performance Benefits
Optimized Load Capacity: Features six precision chrome steel balls that provide excellent radial load carrying capacity (446 lbf dynamic, 161 lbf static), making it suitable for applications requiring robust performance.
High-Speed Capability: The stainless steel cage and open construction enable operation at limiting speeds up to 36,000 rpm, ideal for high-rotation applications.
Precision Engineering: Manufactured to ABEC1 tolerance standards with tight dimensional controls (bore/OD tolerance: -0.0003" to 0"), ensuring consistent performance and easy installation.
Wide Temperature Range: Chrome steel construction allows operation from -86°F to 230°F, suitable for various environmental conditions.
Compliant Materials: Features ROHS and REACH compliant materials, meeting international environmental standards.
R4A Bearing Typical Application Areas
- Small electric motors and precision instruments
- Medical equipment and dental handpieces
- Office automation devices and computer peripherals
- Textile machinery and spindle applications
- Robotics and precision positioning systems
- Pumps and small gearboxes
