639/3-2Z
6000, 6200 & 6300 Series Metric Standard Ball Bearings
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Part No.
Part No.
639/3-2Z
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
36.2 g
Tolerance class
ABEC 1 | ISO P0
Seal type
Shielded
For load direction
Radial
Main Dimensions
Bore diameter
9 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
30 mm
Outside diameter tolerance
-0.008mm to 0
Width
10 mm
Width tolerance
-0.12mm to 0
Performance
Temperature range
-30°to 120 °C
Radial dynamic load rating
891 lbf
Radial static load rating
374 lbf
Limiting speed
24 X 1000 rpm
Lubrication
None
Radial internal clearance
CN
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Chrome Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
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In Stock
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639/3-2Z Bearing Product Overview & Core Advantages
The 639/3-2Z is a single row deep groove ball bearing designed for reliable performance in demanding applications. Engineered with metric dimensions and manufactured to ABEC 1 | ISO P0 tolerance standards, this bearing offers a robust solution for carrying primarily radial loads. Its shielded design (2Z) provides effective protection against contaminant ingress, enhancing operational lifespan. The compact design, featuring a 9 mm bore and 30 mm outside diameter, makes it ideal for applications where space is constrained while maintaining high performance.
639/3-2Z Bearing Model Code Explained, Specifications & Naming Convention
The model number 639/3-2Z is decoded as follows:
- 639/3: Basic bearing series designation, indicating a single row deep groove ball bearing with specific dimensional series.
- -2Z: Signifies that the bearing is equipped with non-contact shields on both sides. This provides effective sealing against dust and other contaminants while minimizing friction, allowing for higher rotational speeds compared to contact seals.
639/3-2Z Bearing Structural Features & Performance Benefits
- High Load Capacity: Constructed from high-grade chrome steel for both rings and balls, this bearing delivers a dynamic load rating of 891 lbf and a static load rating of 374 lbf, ensuring durability under significant radial stress.
- Optimized for Speed: With a limiting speed of 24,000 rpm, it is suitable for high-velocity applications. The standard CN radial internal clearance ensures optimal performance under normal operating conditions.
- Shielded Protection: The 2Z shields protect the internal components from particulate contamination, extending service life and reducing maintenance needs in dirty environments. The bearing is supplied without lubrication, allowing for custom greasing based on specific application requirements.
- Precision Engineering: Manufactured to ABEC 1 precision class, it guarantees consistent and reliable operation, making it a dependable choice for a wide range of industrial uses.
639/3-2Z Bearing Typical Application Areas
This versatile bearing is commonly employed in:
- Small Electric Motors and Gearboxes
- Precision Instruments and Medical Devices
- Office Automation Equipment (e.g., Printers, Scanners)
- Power Tools and Small Appliances
- Automotive Auxiliary Units (e.g., Fans, Pumps)
