W 627/4-2Z
W Series Stainless Steel Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
W 627/4-2Z
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.000306 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
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
Price:
$ 1.13
/ each
In Stock
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W 627/4-2Z Bearing Product Overview & Core Advantages
The W 627/4-2Z is a metric miniature deep groove ball bearing engineered for precision applications requiring compact design and reliable performance. As a single row radial bearing with stainless steel construction, it delivers excellent corrosion resistance and durability. Its key advantage lies in its ability to handle pure radial loads efficiently while operating at high speeds, making it an ideal component for space-constrained, high-precision mechanisms. The inclusion of shields (2Z) and pre-applied grease ensures long-term, maintenance-free operation in demanding environments.
W 627/4-2Z Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| W 627/4 | Basic bearing designation, indicating a metric, deep groove ball bearing series with a 4 mm bore diameter. |
| -2Z | Signifies that the bearing is equipped with non-contact shields on both sides. This provides effective protection against contamination while minimizing friction, contributing to the high limiting speed. |
W 627/4-2Z Bearing Structural Features & Performance Benefits
- Compact & Lightweight Design: With an ultra-compact cross-section (4x7x2.5 mm) and a weight of only 0.000306 kg, this bearing is perfect for applications where size and weight are critical constraints.
- High-Speed Capability: The combination of a stainless steel cage, precision-ground components, and optimized lubrication allows for a limiting speed of 75,000 rpm, enabling smooth operation in high-velocity scenarios.
- Corrosion Resistance & Durability: Manufactured entirely from stainless steel (rings, balls, and cage), the bearing offers superior resistance to corrosion and is suitable for use in harsh or wash-down environments.
- Maintenance-Free Operation: The shielded (2Z) design retains the factory-applied grease, protecting the internal components from contaminants and ensuring consistent performance over a wide temperature range (-30°C to 120°C) without requiring re-lubrication.
W 627/4-2Z Bearing Typical Application Areas
- Precision Instruments: Optical encoders, medical devices, and laboratory equipment.
- Small Motors & Drives: Stepper motors, miniature DC motors, and drone propulsion systems.
- Office Automation: Printers, scanners, and copiers.
- Robotics: Small robotic joints, actuators, and sensor gimbals.
