R4
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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R4 Bearing Product Overview & Core Advantages
The R4 bearing is a precision single row ball bearing designed for reliable performance in demanding applications. Manufactured to ABEC1 tolerance class, this inch-series bearing delivers consistent operation with a bore diameter of 0.25" and outside diameter of 0.625". Its compact design with a width of just 0.196" makes it ideal for space-constrained installations. The bearing features chrome steel rings and balls with a stainless steel cage, providing excellent durability and corrosion resistance. With a radial dynamic load rating of 283 lbf and capability to handle speeds up to 38,000 rpm, this bearing offers optimal performance for radial load applications.
R4 Bearing Model Code Explained, Specifications & Naming Convention
| Feature | Specification | Technical Significance |
|---|---|---|
| Construction | Single Row | Compact design optimized for radial loads |
| Seal Type | Open | Requires external sealing; allows for custom lubrication |
| Internal Clearance | MC3 (0.00008" to 0.0005") | Precision radial internal clearance for optimal performance |
| Cage Material | Stainless Steel | Enhanced corrosion resistance and durability |
R4 Bearing Structural Features & Performance Benefits
The R4 bearing's single row design with 8 precision balls provides excellent radial load capacity while maintaining compact dimensions. The stainless steel cage ensures reliable ball guidance and minimizes friction, contributing to the bearing's high-speed capability of 38,000 rpm. The MC3 radial internal clearance (0.00008" to 0.0005") allows for precise fitment and optimal performance under various operating conditions. The combination of chrome steel rings and balls delivers superior wear resistance and long service life. The open design, while requiring external sealing, provides flexibility for specialized lubrication requirements in specific applications.
R4 Bearing Typical Application Areas
This precision ball bearing finds extensive use in various industrial applications including:
- Small electric motors and precision instruments
- Medical equipment and laboratory devices
- Office automation equipment and computer peripherals
- Textile machinery and light industrial equipment
- Robotics and automation systems requiring compact bearing solutions
The bearing's compliance with ROHS and REACH standards makes it suitable for environmentally sensitive applications and global markets.
