W 627/4 R-2Z
W Series Stainless Steel Flanged Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
W 627/4 R-2Z
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.000406 kg
Tolerance class
P0
Seal type
Shielded
For load direction
Radial
Main Dimensions
Bore diameter
4 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
7 mm
Outside diameter tolerance
-0.008mm to 0
Width
2.5 mm
Width tolerance
-0.12mm to 0
Outer Ring Dimensions
Flange outer diameter
8.2 mm
Flange thickness
0.6 mm
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
32 lbf
Radial static load rating
12 lbf
Limiting speed
75 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
No drawings available at the moment, will be launched soon
In Stock
Price available upon request.
Our sales team will respond within 24 hours with a competitive quote tailored to your requirements.
REQUEST A QUOTE
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
W 627/4 R-2Z Bearing Product Overview & Core Advantages
The W 627/4 R-2Z is a miniature single row deep groove ball bearing engineered for precision applications requiring compact design and reliable performance. Constructed entirely from stainless steel, it offers excellent corrosion resistance. Its key advantages include the ability to handle radial loads efficiently and its shielded (2Z) design, which retains factory-applied grease and protects against contaminant ingress. This combination makes it ideal for applications demanding high reliability, low maintenance, and long service life in challenging environments.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| W 627/4 | Basic bearing designation, indicating a metric, single row deep groove ball bearing with a 4 mm bore. |
| R | Designates a flanged outer ring, which facilitates precise axial location and simplifies housing design. |
| 2Z | Signifies non-contact shields on both sides. This provides effective protection against contaminants while minimizing friction, contributing to the bearing's high limiting speed. |
W 627/4 R-2Z Bearing Structural Features & Performance Benefits
- Compact & Lightweight Design: With an outer diameter of just 7 mm and a weight of only 0.000406 kg, this bearing is perfect for space-constrained and weight-sensitive applications.
- Robust Load Capacity: The deep groove raceway and stainless steel construction enable it to handle the specified radial dynamic and static loads reliably.
- High-Speed Capability: The non-contact 2Z shields and optimized grease lubrication allow for a limiting speed of 75,000 rpm, making it suitable for high-speed miniature spindles and motors.
- Maintenance-Free Operation: The combination of shields and pre-applied grease seals in the lubrication and seals out debris, ensuring long-term, maintenance-free performance within the specified temperature range.
- Corrosion Resistance: All components (rings, balls, cage) are made of stainless steel, providing excellent resistance to rust and corrosion, which is critical for applications in humid or chemically aggressive environments.
W 627/4 R-2Z Bearing Typical Application Areas
This miniature flanged bearing is commonly used in:
- Precision Small Motors (e.g., drone motors, miniature DC motors)
- Medical and Dental Handpieces
- Optical Encoders and Precision Instruments
- Small Fans and Blowers
- Office Automation Equipment (e.g., printers, scanners)
- Various miniature mechanical systems requiring reliable, compact rotational support.
