W 617/8 R
W Series Stainless Steel Flanged Miniature Bearings
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Part No.
Part No.
W 617/8 R
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.0008 kg
Tolerance class
P0
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
8 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
12 mm
Outside diameter tolerance
-0.008mm to 0
Width
2.5 mm
Width tolerance
-0.12mm to 0
Outer Ring Dimensions
Flange outer diameter
13.2 mm
Flange thickness
0.6 mm
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
70 lbf
Radial static load rating
31 lbf
Limiting speed
63 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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W 617/8 R Bearing Product Overview & Core Advantages
The W 617/8 R is a miniature single row deep groove ball bearing engineered for applications demanding compact design and reliable performance in limited spaces. Constructed entirely from stainless steel, it offers excellent corrosion resistance. Its open design allows for versatile lubrication options and facilitates high-speed operation. This bearing is specifically designed to handle primarily radial loads efficiently, making it an ideal choice for precision instruments and small mechanical assemblies where size, weight, and reliability are critical factors.
W 617/8 R Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Interpretation | Technical Significance |
|---|---|---|
| W 617/8 | Basic Series & Bore Size | Indicates a miniature deep groove ball bearing series with an 8 mm bore diameter. |
| R | Flange Design | Signifies that the bearing outer ring incorporates a flange (Flange OD: 13.2 mm). This feature simplifies mounting and positioning within a housing, enhancing assembly accuracy and stability. |
W 617/8 R Bearing Structural Features & Performance Benefits
- Compact & Lightweight Design: With ultra-small bearing dimensions (8x12x2.5 mm) and a weight of only 0.0008 kg, this bearing is perfect for applications with severe space and weight constraints.
- Corrosion Resistance: Manufactured from stainless steel for rings, balls, and cage, it provides superior performance in environments exposed to moisture or certain chemicals.
- High-Speed Capability: The open seal type and precision construction contribute to a high limiting speed of 63,000 rpm, making it suitable for high-speed spindles and rotors.
- Simplified Mounting: The integral flange on the outer ring ensures easy installation and precise axial location, reducing assembly time and cost.
- Standard Precision & Clearance: Built to P0 tolerance class and standard CN radial internal clearance, it delivers consistent and reliable performance for a wide range of general applications.
W 617/8 R Bearing Typical Application Areas
The W 617/8 R is commonly specified in:
- Precision Instruments: Optical encoders, small measuring devices, laboratory equipment.
- Small Motors and Gearboxes: Micro-DC motors, servo motors, miniature gearheads.
- Office Automation Equipment: Printers, scanners, copiers.
- Medical Devices: Dental handpieces, small pumps, analytical instruments.
- Robotics: Joints and actuators in small-scale robotic arms and drones.
