SMF128 2rs
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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SMF128 2rs Bearing Product Overview & Core Advantages
The SMF128 2RS is a miniature metric single row deep groove ball bearing engineered for compact applications demanding high reliability. Constructed entirely from stainless steel (rings, balls, and cage) and featuring integral rubber seals (2RS), this bearing offers excellent corrosion resistance and effective protection against contamination. Its design is optimized for handling radial loads in space-constrained assemblies, making it a superior choice for precision instruments and small mechanisms where durability and consistent performance are critical.
SMF128 2rs Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Benefit |
|---|---|---|
| SMF128 | Basic bearing designation indicating a specific bearing size with an 8mm bore, 12mm OD, and 3.5mm width. | Defines the core dimensions for fit and application selection. |
| 2RS | Signifies contact-type Nitrile Rubber Seals on both sides of the bearing. | Provides superior exclusion of contaminants and retention of lubricant, enhancing bearing life in dusty or humid environments. |
SMF128 2rs Bearing Structural Features & Performance Benefits
- Compact & Lightweight Design: With a cross-section of just 3.5mm in width and a weight of only 1.14 grams, this bearing is ideal for miniaturized applications without sacrificing performance.
- Robust Sealing: The 2RS rubber seals are in light contact with the inner ring, offering highly effective protection. This makes the bearing suitable for applications where moisture, dust, or other fine particulates are present.
- Corrosion Resistance: The all-stainless steel construction ensures excellent resistance to rust and corrosion, which is vital for applications in medical, food, and chemical environments or where wash-downs are common.
- Precision & Smooth Operation: Manufactured to ABEC1 tolerance class with a MC3 radial internal clearance, it provides consistent, low-noise, and low-vibration operation.
- High-Speed Capability: The optimized design with 12 precision balls and a stainless steel cage supports a limiting speed of 36,000 rpm, suitable for high-speed miniature spindles and motors.
SMF128 2rs Bearing Typical Application Areas
The SMF128 2RS is widely used in industries and devices where small size, corrosion resistance, and sealed reliability are paramount. Key applications include:
- Small Precision Motors: Stepper motors, coreless motors, and miniature DC motors.
- Medical and Dental Equipment: Handpieces, surgical tools, and small pumps.
- Office Automation: Printers, scanners, and copiers.
- Instrumentation and Control Systems: Encoders, sensors, and precision gauges.
- Radio-Controlled Models and Drones: Supporting motor shafts and gearboxes.
