W 617/7
W Series Stainless Steel Miniature Bearings
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Part No.
Part No.
W 617/7
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.0006 kg
Tolerance class
P0
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
7 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
11 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
58 lbf
Radial static load rating
23 lbf
Limiting speed
70 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 617/7 Bearing Product Overview & Core Advantages
The W 617/7 is a miniature deep groove ball bearing engineered for applications demanding compact design and reliable performance. Constructed entirely from stainless steel, this single row, open bearing is optimized for radial loads and offers excellent corrosion resistance. Its small bearing dimensions (7mm bore, 11mm OD, 2.5mm width) and low weight make it ideal for space-constrained, high-precision mechanisms requiring smooth operation and long service life.
Model Code Breakdown
The model designation W 617/7 can be interpreted 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.
- /7: Specifies the bore diameter of the bearing, which is 7 mm.
W 617/7 Bearing Structural Features & Performance Benefits
- Full Stainless Steel Construction: The rings, balls, and cage are manufactured from stainless steel, providing superior corrosion resistance and making the bearing suitable for harsh environments and clean applications.
- High-Speed Capability: The precision-ground components and stable cage design contribute to a high limiting speed of 70,000 rpm, enabling use in fast-rotating spindles and small motors.
- Radial Load Capacity: The deep groove raceway and single-row design are optimized to efficiently support radial dynamic load ratings up to 58 lbf, ensuring reliable performance under load.
- Precision P0 Class: Manufactured to P0 (Normal) tolerance class, this bearing offers consistent quality and performance for a wide range of general applications.
W 617/7 Bearing Typical Application Areas
This miniature bearing is commonly specified in:
- Small precision electric motors and gearboxes
- Medical and dental handpieces
- Optical encoders and instrumentation
- Office automation equipment (e.g., printers, scanners)
- Radio-controlled models and drones
- Precision mechanical assemblies requiring compact, corrosion-resistant components
