W 604 R
W Series Stainless Steel Flanged Miniature Bearings
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Part No.
Part No.
W 604 R
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.0022 kg
Tolerance class
P0
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
4 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
12 mm
Outside diameter tolerance
-0.008mm to 0
Width
4 mm
Width tolerance
-0.12mm to 0
Outer Ring Dimensions
Flange outer diameter
13.5 mm
Flange thickness
1 mm
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
121 lbf
Radial static load rating
40 lbf
Limiting speed
80 X 1000 rpm
Lubrication
None
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
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W 604 R Bearing Product Overview & Core Advantages
The W 604 R is a metric single row deep groove ball bearing engineered for exceptional performance in compact applications. Constructed entirely from stainless steel (rings, balls, and cage), it offers superior corrosion resistance. Its open design allows for versatile lubrication options and facilitates high-speed operation. This bearing is specifically designed to handle radial loads efficiently, making it an ideal choice for applications demanding high reliability, compact dimensions, and long service life in challenging environments.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| W | Stainless Steel Deep Groove Ball Bearing series designation. |
| 604 | Standard bearing size code indicating a 4 mm bore, 12 mm OD, and 4 mm width. |
| R | Flange on the outer ring. This feature simplifies mounting and positioning within a housing. |
W 604 R Bearing Structural Features & Performance Benefits
- Compact & Robust Flange Design: The integrated flange (13.5 mm outer diameter) provides secure axial location, simplifies assembly, and reduces the need for complex housing designs, saving space and cost.
- Full Stainless Steel Construction: The use of stainless steel for all core components ensures excellent corrosion resistance, making it suitable for applications exposed to moisture, chemicals, or washdowns. This also contributes to a long operational lifespan.
- High-Speed Capability: The open seal type and precision stainless steel cage minimize friction and allow for a high limiting speed of 80,000 rpm, which is critical for miniature and high-speed machinery.
- Precision & Load Handling: Manufactured to P0 tolerance class with standard CN radial internal clearance, this bearing provides reliable and smooth running. It is optimized for radial dynamic load capacity, ensuring stable performance under stress.
W 604 R Bearing Typical Application Areas
This bearing is widely used in industries and equipment where miniaturization, corrosion resistance, and high-speed performance are paramount. Key applications include:
- Small Electric Motors: Ideal for spindle support in miniature DC motors and stepper motors.
- Precision Instruments: Used in optical encoders, medical devices, and laboratory equipment.
- Office Automation: Found in printers, scanners, and small fans.
- Food & Beverage Equipment: Suitable for conveyors and pumps due to its stainless steel construction and compliance with ROHS and REACH.
- Robotics: Employed in small joints and gearboxes for compact robotic arms.
