R144
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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R144 Bearing Product Overview & Core Advantages
The R144 is a single row deep groove ball bearing designed for precision radial load applications. Manufactured to ABEC1 precision class standards, this bearing delivers reliable performance in compact spaces with its miniature dimensions (0.125" bore × 0.25" OD × 0.0937" width). Constructed entirely from chrome steel rings and balls with a stainless steel cage, it offers excellent durability and corrosion resistance. The open design requires lubrication but provides superior limiting speed capabilities up to 67,000 rpm, making it ideal for high-speed miniature applications demanding consistent performance.
R144 Bearing Model Code Explained, Specifications & Naming Convention
| Code Element | Technical Meaning |
|---|---|
| R144 | Standard inch series deep groove ball bearing designation |
| Open | No seals or shields, allowing for maximum speed capability and easy relubrication |
| ABEC1 | Precision tolerance class ensuring consistent performance and smooth operation |
| MC3 | Normal radial internal clearance group (0.00008" to 0.0005") for general applications |
R144 Bearing Structural Features & Performance Benefits
High-Speed Capability: The open bearing construction combined with a precision stainless steel cage and optimized ball quantity (7 balls of 0.03941" diameter) enables exceptional rotational performance up to 67,000 rpm.
Radial Load Capacity: With a dynamic load rating of 54 lbf and static load rating of 17 lbf, this bearing provides reliable support for radial loads in compact assemblies.
Precision Engineering: Manufactured to ABEC1 tolerance standards with tight dimensional control (bore/OD tolerance: -0.0003" to 0"), ensuring smooth operation and minimal vibration.
Material Excellence: Chrome steel rings and balls provide high hardness and wear resistance, while the stainless steel cage offers corrosion resistance and dimensional stability.
R144 Bearing Typical Application Areas
- Precision instruments and measuring devices
- Small motors and miniature gearboxes
- Medical devices and dental handpieces
- Office automation equipment and printers
- Robotics and miniature automation systems
- Optical encoders and precision positioning systems
