W 617/8
W Series Stainless Steel Miniature Bearings
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Part No.
Part No.
W 617/8
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.0007 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
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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In Stock
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W 617/8 Bearing Product Overview & Core Advantages
The W 617/8 is a metric miniature deep groove ball bearing designed for applications demanding compact size and reliable performance. Constructed entirely from stainless steel, it offers excellent corrosion resistance. As a single row bearing with an open design, it is optimized for high-speed operation and primarily handles radial loads. Its minimal cross-section and low weight make it an ideal solution for precision instruments and compact mechanisms where space is at a premium.
W 617/8 Bearing Model Code Explained, Specifications & Naming Convention
The model designation W 617/8 can be broken down as follows:
- W: Designates a series of stainless steel deep groove ball bearings.
- 617: Indicates a specific bearing series with a very small cross-section.
- /8: Specifies the bore diameter of the bearing, which is 8 mm.
W 617/8 Bearing Structural Features & Performance Benefits
- All-Stainless-Steel Construction: The rings, balls, and cage are manufactured from stainless steel, providing superior corrosion resistance and suitability for harsh environments or washdown applications.
- Compact and Lightweight: With an outer diameter of just 12 mm and a width of 2.5 mm, this bearing is engineered for applications with severe space constraints, contributing to a lower overall system weight.
- High-Speed Capability: The open design and precision manufacturing allow for a high limiting speed of 63,000 rpm, making it suitable for high-speed spindles and small motors.
- Radial Load Capacity: The deep groove raceway and single-row design are optimized to efficiently support radial dynamic and static loads in compact assemblies.
W 617/8 Bearing Typical Application Areas
This miniature bearing is commonly specified in:
- Precision instruments and optical devices
- Small electric motors and miniature gearboxes
- Medical and dental handpieces
- Office automation equipment (e.g., printers, scanners)
- Robotics and RC models
