W 639/3-2RS1
W Series Stainless Steel Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
W 639/3-2RS1
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.000822 kg
Tolerance class
P0
Seal type
Sealed
For load direction
Radial
Main Dimensions
Bore diameter
3 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
8 mm
Outside diameter tolerance
-0.008mm to 0
Width
4 mm
Width tolerance
-0.12mm to 0
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
72 lbf
Radial static load rating
20 lbf
Limiting speed
43 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 639/3-2RS1 Bearing Product Overview & Core Advantages
The W 639/3-2RS1 is a metric miniature deep groove ball bearing designed for precision applications requiring compact dimensions and reliable performance. This sealed single row bearing excels in handling radial loads efficiently while offering protection against contamination. Manufactured entirely from stainless steel, it provides excellent corrosion resistance, making it suitable for demanding environments. Its compact design (3mm bore, 8mm OD) and pre-lubrication ensure immediate installation and long-term, maintenance-free operation.
W 639/3-2RS1 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| W 639/3 | Basic bearing designation for a metric, stainless steel deep groove ball bearing series with a 3mm bore diameter. |
| 2RS1 | Indicates the bearing is fitted with two contact seals (RS1 type) on both sides. These seals provide superior protection against dust and moisture ingress while retaining lubricant. |
W 639/3-2RS1 Bearing Structural Features & Performance Benefits
- Robust Sealed Construction: The two RS1 contact seals are integral to the bearing's longevity, effectively shielding the stainless steel balls and raceways from contaminants. This design is critical for maintaining performance in unclean or humid conditions.
- High-Corrosion Resistance: With all components—rings, balls, and cage—made from stainless steel, this bearing is inherently resistant to rust and corrosion, ideal for applications exposed to water, chemicals, or washdowns.
- Pre-Lubricated for Life: The bearing is pre-filled with a high-quality grease lubricant, enabling immediate use and providing long-lasting, maintenance-free operation within its specified temperature range of -30°C to 120°C.
- Precision and Reliability: Built to P0 tolerance class and standard CN radial internal clearance, this bearing offers consistent and reliable performance for a wide range of miniature and precision applications.
W 639/3-2RS1 Bearing Typical Application Areas
- Precision Instruments: Optical encoders, measuring devices, and laboratory equipment.
- Small Motors and Gearboxes: Stepper motors, miniature DC motors, and precision gearheads.
- Office Automation & IT Equipment: Printers, scanners, and cooling fans.
- Medical Devices: Small pumps, handheld surgical tools, and diagnostic equipment.
- Robotics and Automation: Small joints, actuators, and conveyor system guides.
