R09
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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R09 Bearing Product Overview & Core Advantages
The R09 is a precision miniature ball bearing designed for applications requiring compact dimensions and reliable performance. As a single row radial ball bearing with an open design, it excels in handling moderate radial loads while operating at high speeds. Manufactured to ABEC1 tolerance class, this bearing offers excellent value for high-volume applications where consistent quality and dimensional stability are critical. Its compact inch-series size (0.04" bore) makes it ideal for space-constrained assemblies.
R09 Bearing Model Code Explained, Specifications & Naming Convention
| Code Element | Technical Meaning |
|---|---|
| R09 | Standard designation for this specific miniature bearing size in inch series |
| Open | No seals or shields, allowing for custom lubrication schemes and maximum speed capability |
| MC3 | Radial internal clearance group (0.00008" to 0.0005") suitable for most general applications |
R09 Bearing Structural Features & Performance Benefits
High-Speed Capability: The stainless steel cage and optimized ball complement (6 balls of 0.025" diameter) enable operation at limiting speeds up to 130,000 rpm, making it suitable for high-speed miniature applications.
Precision Engineering: Manufactured to ABEC1 tolerance standards with tight dimensional control (bore tolerance: -0.0003" to 0"), ensuring consistent performance and easy installation in precision mechanisms.
Material Excellence: Constructed from chrome steel rings and balls with stainless steel cage, providing excellent durability and corrosion resistance for long service life.
Optimized Internal Clearance: The MC3 radial clearance (0.00008" to 0.0005") provides optimal running characteristics for most operating conditions, balancing thermal expansion and precision requirements.
R09 Bearing Typical Application Areas
- Small precision motors and miniature DC motors
- Medical devices and dental handpieces
- Optical instruments and laboratory equipment
- Office automation equipment including printers and scanners
- Robotics and miniature automation systems
- Aerospace instrumentation and guidance systems
