639 2rs
600 Series Miniature Bearings
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Part No.
Part No.
639 2rs
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
37.1 g
Tolerance class
ABEC1
Seal type
Sealed
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
Inner Ring Dimensions
Inner ring type
Standard
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
7
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
891 lbf
Radial static load rating
374 lbf
Limiting speed
24 X 1000 rpm
Lubrication
Required
Radial internal clearance
MC3
Radial internal clearance
0.002mm to 0.013mm
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Stainless Steel
Shield material
Nitrile Rubber
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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639 2rs Bearing Product Overview & Core Advantages
The 639 2RS is a metric single row deep groove ball bearing designed for exceptional reliability in demanding applications. This sealed bearing excels in handling radial loads and offers robust performance with its chrome steel construction. Its compact design, featuring a 9 mm bore and 30 mm outside diameter, makes it an ideal choice for space-constrained assemblies requiring consistent operation and high limiting speeds up to 24,000 rpm.
639 2rs Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 639 | Basic bearing series designation, indicating a metric deep groove ball bearing with specific dimensional proportions. |
| 2RS | Signifies contact seals on both sides. The RS denotes Nitrile Rubber (NBR) seals, providing effective protection against contaminants and retention of lubricant. |
639 2rs Bearing Structural Features & Performance Benefits
- Robust Load Capacity: Engineered with a single row of chrome steel balls and a stainless steel cage, this bearing reliably supports a dynamic load rating of 891 lbf and a static load rating of 374 lbf.
- Enhanced Contamination Protection: The double-sided contact seals (2RS) effectively shield the internal components from dust, moisture, and other pollutants, significantly extending service life.
- Optimized High-Speed Operation: The precision ABEC1 tolerance class and stable cage design contribute to smooth running and low vibration, enabling a high limiting speed of 24,000 rpm.
- Pre-Configured Internal Clearance: The standard MC3 radial internal clearance (0.002mm to 0.013mm) ensures optimal performance under normal operating conditions and temperatures ranging from -30°C to 110°C.
639 2rs Bearing Typical Application Areas
This versatile bearing is widely specified in applications requiring compact size, sealed protection, and reliable performance. Key industries and equipment include:
- Small Electric Motors (e.g., cooling fans, power tools)
- Precision Instruments and medical devices
- Office Automation Equipment (printers, scanners)
- Light-duty Gearboxes and transmission systems
- Various industrial machinery with moderate load and speed requirements
