W 617/2
W Series Stainless Steel Miniature Bearings
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Part No.
Part No.
W 617/2
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.0001 kg
Tolerance class
P0
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
2 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
4 mm
Outside diameter tolerance
-0.008mm to 0
Width
1.2 mm
Width tolerance
-0.04mm to 0
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
15 lbf
Radial static load rating
4 lbf
Limiting speed
130 X 1000 rpm
Lubrication
None
Radial internal clearance
CN
Materials
Ring material
Stainless Steel
Ball material
Stainless Steel
Cage material
Stainless Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
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In Stock
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W 617/2 Bearing Product Overview & Core Advantages
The W 617/2 is a metric single row deep groove ball bearing designed for applications demanding compact size, high precision, and reliable performance. Constructed entirely from stainless steel, it offers excellent corrosion resistance. Its primary function is to support radial loads efficiently. The bearing's open design allows for versatile lubrication options and facilitates high-speed operation, making it an ideal choice for miniature and precision instruments where space is at a premium and operational reliability is critical.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| W 617/2 | Standard designation for a metric, single row deep groove ball bearing series with a 2mm bore. |
| Open (Seal Type) | No seals or shields. This allows for higher limiting speeds and custom lubrication but requires a clean operating environment. |
| None (Lubrication) | The bearing is supplied without grease, providing flexibility for the application of a specialized lubricant. |
| P0 (Tolerance Class) | Standard dimensional and geometrical tolerance per ISO standards, suitable for most general applications. |
| CN (Radial Internal Clearance) | Normal radial internal clearance, the standard group for most operating conditions. |
W 617/2 Bearing Structural Features & Performance Benefits
- Compact and Lightweight Design: With an extremely small bearing size of 2mm bore, 4mm outside diameter, and 1.2mm width, and a weight of just 0.0001 kg, it is engineered for applications with severe space and weight constraints.
- Corrosion Resistance: The use of stainless steel for all components (rings, balls, and cage) ensures reliable operation in humid or mildly corrosive environments and complies with ROHS and REACH directives.
- High-Speed Capability: The open construction and precision engineering contribute to a high limiting speed of 130,000 rpm, making it suitable for high-speed miniature spindles and rotors.
- Precision Performance: Manufactured to P0 tolerance class with a controlled CN radial clearance, this precision bearing ensures smooth and consistent operation, minimizing vibration and noise.
W 617/2 Bearing Typical Application Areas
- Miniature and Precision DC Motors
- Medical and Dental Hand Tools
- Optical Encoders and Scanners
- Small Fans and Blowers
- Precision Instruments and Laboratory Equipment
- Radio-Control Models and Drones
