W 637/3-2Z
W Series Stainless Steel Miniature Bearings
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Basic Information
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W 637/3-2Z Bearing Product Overview & Core Advantages
The W 637/3-2Z is a metric single row deep groove ball bearing engineered for precision applications requiring compact dimensions and reliable performance. Constructed entirely from stainless steel, it offers excellent corrosion resistance. Its key advantage lies in its ability to handle radial loads efficiently while being shielded (2Z) and pre-lubricated for long-term, maintenance-free operation in demanding environments. This makes it an ideal choice for applications where space is limited and high reliability is paramount.
W 637/3-2Z Bearing Model Code Explained, Specifications & Naming Convention
- W 637/3: Basic model number denoting a single row deep groove ball bearing with a 3 mm bore.
- -2Z: Signifies that the bearing is equipped with non-contact shields on both sides. This provides effective protection against contamination while minimizing friction, contributing to the high limiting speed.
W 637/3-2Z Bearing Structural Features & Performance Benefits
Compact & Robust Design: With dimensions of 3x6x3 mm, this bearing provides a high load capacity within a minimal envelope. The deep groove raceway and stainless steel construction ensure high dimensional stability and resistance to corrosion.
Radial Load Capacity: Engineered to support significant radial dynamic load rating (26 lbf) and radial static load rating (8 lbf) for its size.
High-Speed Performance: The combination of low-friction stainless steel cage, non-contact shields, and optimized grease lubrication enables a high limiting speed of 85,000 rpm.
Maintenance-Free Operation: The integrated 2Z shields and factory-applied grease seal in the lubricant, making the bearing ready for use and suitable for applications where re-lubrication is not possible.
W 637/3-2Z Bearing Typical Application Areas
This miniature precision bearing is commonly specified in:
- Small precision motors and stepper motors
- Medical and dental handpieces
- Optical encoders and instrumentation
- Small fans and blowers
- Office automation equipment and miniature gearboxes
