MF72
MF 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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MF72 Bearing Product Overview & Core Advantages
The MF72 is a metric miniature ball bearing designed for applications requiring compact dimensions and reliable performance. As a single row deep groove ball bearing with an open design, it excels in handling radial loads efficiently. Its construction from high-grade chrome steel ensures durability and consistent operation. The bearing is characterized by its extremely small size (2 mm bore, 7 mm OD) and light weight (0.5 g), making it an ideal choice for precision instruments and compact mechanisms where space is at a premium.
MF72 Bearing Model Code Explained, Specifications & Naming Convention
| Designation | Interpretation |
|---|---|
| MF72 | Standard model number for this specific miniature bearing series. |
| Open | No shield or seal, allowing for higher speeds and easy re-lubrication, but requiring a clean operating environment. |
| ABEC1 | Specifies the tolerance class, indicating standard precision suitable for a wide range of general applications. |
| MC3 | Denotes the radial internal clearance group, optimized for normal operating conditions. |
MF72 Bearing Structural Features & Performance Benefits
- Deep Groove Geometry: The raceway design is optimized for high radial load capacity, ensuring stable performance under load.
- High-Grade Materials: Rings and balls made from chrome steel (AISI 52100 equivalent) provide excellent wear resistance and fatigue life. The stainless steel cage offers high strength and corrosion resistance.
- Optimized Internal Geometry: With 7 balls of 1.2 mm diameter, the bearing achieves a balanced design for smooth rotation and low noise operation.
- High-Speed Capability: The open design and precision construction contribute to a limiting speed of 63,000 rpm, making it suitable for high-speed miniature spindles and motors.
- Standard Internal Clearance (MC3): Provides reliable performance across a standard temperature range and fit conditions.
- Flange Option: The integrated flange (8.2 mm OD) facilitates secure and simplified mounting, saving space and assembly time.
MF72 Bearing Typical Application Areas
The MF72 miniature ball bearing is engineered for use in a variety of compact and high-precision devices, including:
- Small DC Motors and Coreless Motors
- Precision Instrumentation and Optical Encoders
- Medical Devices such as Dental Handpieces and Surgical Tools
- Office Automation Equipment including Printers and Scanners
- Robotics and Miniature Gearboxes
- Radio-Controlled Models and Drones
