W 638/3 R-2RS1
W Series Stainless Steel Flanged Miniature Bearings
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Basic Information
Main Dimensions
Outer Ring Dimensions
Performance
Materials
Environment & Compliance
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W 638/3 R-2RS1 Bearing Product Overview & Core Advantages
The W 638/3 R-2RS1 is a miniature sealed deep groove ball bearing designed for compact applications requiring high reliability and maintenance-free operation. This metric bearing features a single row construction with integrated seals, making it ideal for handling radial loads in confined spaces. Its all-stainless steel construction provides excellent corrosion resistance, while the pre-applied grease lubrication ensures smooth operation across a wide temperature range from -30°C to 120°C. This bearing is characterized by its compact dimensions (3mm bore, 7mm OD) and is engineered for applications demanding precision and long service life.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| W 638/3 | Basic bearing designation indicating a miniature deep groove ball bearing series with 3mm bore diameter |
| R | Flanged outer ring design providing axial location and simplified mounting |
| 2RS1 | Double rubber seals on both sides offering effective protection against contamination and retention of lubricant |
W 638/3 R-2RS1 Bearing Structural Features & Performance Benefits
Compact Design with Flange: The integrated flange (8.1mm outer diameter) enables easy axial positioning and simplifies installation in housing designs, reducing assembly time and costs.
Superior Sealing Performance: The 2RS1 double rubber seals provide excellent protection against dust, moisture, and other contaminants while effectively retaining the pre-applied grease, ensuring maintenance-free operation throughout the bearing's service life.
All-Stainless Steel Construction: Manufactured entirely from stainless steel (rings, balls, and cage), this bearing offers outstanding corrosion resistance, making it suitable for applications exposed to harsh environments or requiring frequent washdown.
Optimized Performance Characteristics: With a limiting speed of 45,000 rpm and CN radial internal clearance, this bearing delivers reliable performance in high-speed applications while maintaining P0 tolerance class precision for consistent operation.
W 638/3 R-2RS1 Bearing Typical Application Areas
- Small precision motors and micro-drives requiring compact bearing solutions
- Medical devices and dental handpieces where corrosion resistance and reliability are critical
- Office automation equipment including printers, scanners, and copiers
- Instrumentation and measurement devices demanding high precision and smooth operation
- Robotics and small automation systems with space constraints
- Food processing equipment where stainless steel construction and sealed design are advantageous
