679
600 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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679 Bearing Product Overview & Core Advantages
The 679 is a metric single row deep groove ball bearing engineered for high-speed operation and reliable radial load support. Its compact design, with a minimal cross-section, makes it an ideal solution for applications where space is at a premium. Manufactured to ABEC1 precision tolerances, this bearing ensures consistent performance and smooth operation, making it a fundamental component for various precision mechanisms and small electric motors.
679 Bearing Model Code Explained, Specifications & Naming Convention
The model number 679 follows a standard industry designation for miniature and instrument ball bearings. Its specification details are defined by the following key attributes:
- System of measurement: Metric
- Seal type: Open - Requires external sealing for contaminated environments.
- Tolerance class: ABEC1 - Denotes a standard level of precision for runout and dimensional accuracy.
- Radial internal clearance: MC3 (0.002mm to 0.013mm) - A standard clearance for general applications.
679 Bearing Structural Features & Performance Benefits
The performance of the 679 bearing is a direct result of its robust construction and material selection.
- High-Speed Capability: The stainless steel cage guides the 12 precision balls effectively, contributing to a high limiting speed of 36,000 rpm. This makes it suitable for demanding high-RPM applications.
- Radial Load Capacity: The deep groove raceway and chrome steel construction (rings and balls) provide a dependable radial dynamic load rating of 176 lbf and a static load rating of 84 lbf.
- Compact and Lightweight: With dimensions of 9mm (bore) x 14mm (OD) x 3mm (width) and a weight of only 1.35 grams, it offers a superior power-to-size ratio.
- Material Integrity: The use of chrome steel for load-bearing components ensures high hardness and durability, while the stainless steel cage offers excellent corrosion resistance.
679 Bearing Typical Application Areas
The 679 miniature ball bearing is widely used in compact, high-speed devices across multiple industries, including:
- Small Precision Electric Motors (e.g., in drones, RC models)
- Instrumentation and Measurement Devices
- Office Automation Equipment (printers, scanners)
- Medical and Dental Handpieces
- Computer Cooling Fans
- Textile Machinery Guides and Spindles
