SMF137
SMF Series Stainless Steel 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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SMF137 Bearing Product Overview & Core Advantages
The SMF137 is a single row deep groove ball bearing designed for compact, high-precision applications requiring reliable performance. This metric series bearing features a standard open design and is constructed entirely from stainless steel, providing excellent corrosion resistance. Its primary advantage lies in its ability to handle radial loads efficiently within a constrained space, making it ideal for applications where size and weight are critical factors. The bearing operates effectively within a wide temperature range and complies with RoHS and REACH standards, ensuring suitability for various industrial and precision instruments.
SMF137 Bearing Model Code Explained, Specifications & Naming Convention
The model designation SMF137 and its provided specifications indicate the following key technical characteristics:
- Seal Type: Open - Requires external lubrication but allows for higher limiting speeds.
- Bore Diameter: 7 mm - Specifies the shaft size for mounting.
- Tolerance Class: ABEC1 - Denotes a standard level of precision for general applications.
- Radial Internal Clearance: MC3 - Indicates a greater than normal internal clearance, suitable for applications with thermal expansion or where misalignment may occur.
- Ring, Ball & Cage Material: Stainless Steel - Provides corrosion resistance for demanding environments.
SMF137 Bearing Structural Features & Performance Benefits
The SMF137's performance is derived from its specific construction and material selection:
- Compact & Lightweight Design: With an outer diameter of 13 mm, a width of just 3 mm, and a weight of only 1.64 g, this bearing is engineered for applications with severe space and weight limitations.
- High-Speed Capability: The open design and stainless steel cage contribute to a high limiting speed of 36,000 rpm, making it suitable for high-speed spindles and small motors.
- Robust Load Capacity: Despite its small size, it offers a dynamic load rating of 93 lbf and a static load rating of 45 lbf, providing reliable performance under radial loads.
- Corrosion Resistance: The use of stainless steel for all critical components ensures long-term reliability in humid or corrosive environments.
SMF137 Bearing Typical Application Areas
The SMF137's combination of a small bearing size, high-speed capability, and corrosion resistance makes it ideal for:
- Small Precision Electric Motors
- Medical and Dental Handpieces
- Optical Encoders and Scanners
- Instrumentation and Control Devices
- Office Automation Equipment (e.g., small printers, scanners)
- Robotic Arms and Miniature Gearboxes
