W 627/5 R-2Z
W Series Stainless Steel Flanged Miniature Bearings
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Part No.
Part No.
W 627/5 R-2Z
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.000407 kg
Tolerance class
P0
Seal type
Shielded
For load direction
Radial
Main Dimensions
Bore diameter
5 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
8 mm
Outside diameter tolerance
-0.008mm to 0
Width
2.5 mm
Width tolerance
-0.12mm to 0
Outer Ring Dimensions
Flange outer diameter
9.2 mm
Flange thickness
0.6 mm
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
27 lbf
Radial static load rating
10 lbf
Limiting speed
70 X 1000 rpm
Lubrication
Grease
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 627/5 R-2Z Bearing Product Overview & Core Advantages
The W 627/5 R-2Z is a miniature single row deep groove ball bearing engineered for applications demanding compact design 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 its shielded design (2Z) and pre-applied grease lubrication ensure long-term, maintenance-free operation in challenging environments. This makes it an ideal precision bearing for compact mechanisms requiring high reliability.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| W 627/5 | Bearing series and size designation (5mm bore, 8mm OD). |
| R | Flanged outer ring, providing axial location and simplified mounting. |
| 2Z | Non-contact shields on both sides. This seal type effectively excludes contaminants while minimizing friction, contributing to the high limiting speed. |
W 627/5 R-2Z Bearing Structural Features & Performance Benefits
- Compact & Lightweight Design: With a width of just 2.5 mm and a weight of 0.000407 kg, this bearing is engineered for space-constrained miniature applications.
- Flanged Outer Ring: The integrated flange (9.2 mm outer diameter) simplifies installation and provides secure axial positioning within the housing, enhancing assembly accuracy.
- Shielded & Pre-Lubricated: The 2Z shields protect the bearing interior from dust and other particulates. Combined with factory-applied grease, this creates a sealed, maintenance-free system ideal for the specified temperature range of -30°C to 120°C.
- Stainless Steel Construction: All components (rings, balls, cage) are made from stainless steel, offering superior corrosion resistance and suitability for washdown environments or applications requiring chemical compatibility.
- High-Speed Capability: The low-friction design, featuring non-contact shields and optimized lubrication, enables a high limiting speed of 70,000 rpm.
W 627/5 R-2Z Bearing Typical Application Areas
This miniature flanged bearing is specifically designed for small, high-speed, and precision devices. Common applications include:
- Small DC Motors and Stepper Motors
- Precision Instrumentation and Optical Encoders
- Medical Devices and Dental Handpieces
- Office Automation Equipment (e.g., small printers, scanners)
- Robotics and Miniature Gearboxes
