FR1
FR Series Flanged Miniature Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Outer Ring Dimensions
Ball & Washer Dimensions
Performance
Materials
Environment & Compliance
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FR1 Bearing Product Overview & Core Advantages
The FR1 is a single row deep groove ball bearing designed for high-performance applications requiring compact design and reliable operation. Engineered to primarily accommodate radial loads, this inch-series bearing is characterized by its small cross-section and lightweight construction. Manufactured from high-grade chrome steel with a stainless steel cage, it offers a robust solution for precision mechanisms. Its ABEC1 tolerance class ensures consistent performance, making it suitable for applications demanding good rotational accuracy and operational reliability in constrained spaces.
FR1 Bearing Model Code Explained, Specifications & Naming Convention
| Code/Feature | Technical Significance |
|---|---|
| FR1 | The base designation for this specific inch-size, single row deep groove ball bearing. |
| Open (Seal Type) | Indicates the bearing has no integral seals or shields, allowing for higher limiting speeds and requiring external lubrication and protection from contaminants. |
| MC3 (Internal Clearance) | Specifies a radial internal clearance group that is greater than normal (C0), making it suitable for applications with significant temperature gradients or where interference fits are used. |
FR1 Bearing Structural Features & Performance Benefits
Optimized for Radial Loads: The deep groove raceway and single row construction are engineered to efficiently support substantial radial dynamic load ratings (44 lbf), providing stable performance in its size class.
High-Speed Capability: The combination of an open design, a precision-ground chrome steel ball material, and a lightweight stainless steel cage material contributes to a high limiting speed of 90,000 rpm, ideal for fast-rotating spindles and small motors.
Precision and Stability: Manufactured to ABEC1 precision standards with tight dimensional tolerances on the bore diameter, outside diameter, and width, ensuring smooth and accurate rotation.
Wide Operating Range: The chrome steel construction allows for a broad temperature range from -86 to 230 °F, accommodating various operational environments.
FR1 Bearing Typical Application Areas
- Small Precision Motors and Spindles
- Instrumentation and Control Devices
- Office Automation Equipment (e.g., small printers, scanners)
- Medical Devices and Dental Handpieces
- Robotic Joints and Miniature Gearboxes
