R1-4
R Series Miniature Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Inner Ring Dimensions
Ball & Washer Dimensions
Performance
Materials
Environment & Compliance
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
R1-4 Bearing Product Overview & Core Advantages
The R1-4 is a precision miniature ball bearing designed for applications requiring reliable performance in compact spaces. As a single row radial ball bearing with an open design, it excels in handling radial loads efficiently. Manufactured to ABEC1 tolerance class, this bearing offers a cost-effective solution for high-speed operation, with a limiting speed of 67,000 rpm. Its compact dimensions (0.07813" bore, 0.25" OD) and lightweight construction (0.4 g) make it ideal for precision instruments and small mechanisms.
R1-4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| R1-4 | Standard inch-series bearing designation |
| Open | No seals or shields, allowing for custom lubrication schemes |
| MC3 | Greater than normal radial internal clearance (0.00008" to 0.0005") for thermal expansion compensation |
R1-4 Bearing Structural Features & Performance Benefits
Constructed with chrome steel rings and balls combined with a stainless steel cage, the R1-4 delivers durable performance. The seven-ball configuration with a ball diameter of 0.03941" provides optimal load distribution. The MC3 radial clearance ensures reliable operation across the wide temperature range of -86 to 230 °F, accommodating differential thermal expansion between shaft and housing. With a radial dynamic load rating of 54 lbf and static load rating of 17 lbf, this bearing offers robust performance in compact dimensions.
R1-4 Bearing Typical Application Areas
- Precision instruments and measuring devices
- Small electric motors and miniature gearboxes
- Medical devices and dental handpieces
- Optical equipment and lens positioning systems
- Robotics and small mechanism pivot points
- Office automation equipment and precision spindles
