SFRW4
SFRW Series Stainless Steel Extended Inner Ring Flanged Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
SFRW4
Basic Information
Bearing type
Ball
System of measurement
Inch
Construction
Single Row
Weight
0.2 g
Tolerance class
ABEC1
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
0.25"
Bore diameter tolerance
-0.0003" to 0"
Outside diameter
0.625"
Outside diameter tolerance
-0.0003" to 0"
Width
0.196"
Width tolerance
-0.005" to 0"
Inner Ring Dimensions
Inner ring type
Extended
Inner ring width
0.2273"
Shoulder diameter inner ring
0.362"
Outer Ring Dimensions
Flange outer diameter
0.69"
Flange thickness
0.042"
Ball & Washer Dimensions
Ball diameter
0.0937"
Ball quantity
8
Performance
Temperature range
-86 to 230 °F
Radial dynamic load rating
255 lbf
Radial static load rating
101 lbf
Limiting speed
99 X 1000 rpm
Lubrication
Required
Radial internal clearance
MC3
Radial internal clearance
0.00008" to 0.0005"
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:
$ 4.29
/ each
In Stock
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SFRW4 Bearing Product Overview & Core Advantages
The SFRW4 is a single row deep groove ball bearing designed for high-performance applications requiring precision and reliability. Manufactured entirely from stainless steel, it offers excellent corrosion resistance. This bearing is engineered to accommodate primarily radial loads and is characterized by its compact design with an extended inner ring, facilitating easier mounting and secure positioning. Its ABEC1 precision class ensures consistent performance for a wide range of industrial uses.
SFRW4 Bearing Model Code Explained, Specifications & Naming Convention
| Code/Feature | Technical Meaning |
|---|---|
| SFRW4 | Manufacturer's specific series designation for this flanged bearing unit. |
| Open (Seal Type) | The bearing is unsealed, allowing for high-speed operation and requiring an external sealing solution or controlled environment. |
| Extended Inner Ring | The inner ring protrudes beyond the bearing width, providing a positive locating surface and simplifying axial positioning. |
| Lubrication: Required | The bearing is supplied without grease, offering flexibility for the user to apply a lubricant suitable for the specific application's speed and temperature requirements. |
SFRW4 Bearing Structural Features & Performance Benefits
- High-Speed Capability: The open design and stainless steel cage minimize friction and drag, enabling a high limiting speed of 99,000 rpm. This makes it ideal for demanding, high-velocity applications.
- Robust Load Capacity: The deep groove raceway and optimized internal geometry provide a dynamic load rating of 255 lbf and a static load rating of 101 lbf, ensuring reliable performance under significant radial loads.
- Precision & Stability: Built to ABEC1 tolerance class with a controlled radial internal clearance (MC3 group), this bearing delivers smooth, low-vibration operation and consistent running accuracy.
- Corrosion Resistance & Compliance: Constructed entirely from stainless steel (rings, balls, and cage), it is suited for harsh environments and complies with ROHS and REACH standards.
- Integrated Flange & Mounting: The outer ring features a flange (0.69" outer diameter), which simplifies housing design and provides secure axial location, preventing creep in the housing bore.
SFRW4 Bearing Typical Application Areas
This bearing is well-suited for a variety of precision applications, including:
- High-speed small motors and spindles
- Medical and dental handpieces
- Precision instruments and optical devices
- Food processing and packaging machinery (where corrosion resistance is critical)
- Office automation equipment and small gearboxes
