SF634
SF Series Stainless Steel Flanged Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
SF634
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
5.66 g
Tolerance class
ABEC1
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
4 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
16 mm
Outside diameter tolerance
-0.008mm to 0
Width
5 mm
Width tolerance
-0.12mm to 0
Inner Ring Dimensions
Inner ring type
Standard
Outer Ring Dimensions
Flange outer diameter
18 mm
Flange thickness
1 mm
Ball & Washer Dimensions
Ball diameter
2.381 mm
Ball quantity
7
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
231 lbf
Radial static load rating
85 lbf
Limiting speed
32.4 X 1000 rpm
Lubrication
Required
Radial internal clearance
0.002mm to 0.013mm
Radial internal clearance
MC3
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:
$ 1.59
/ each
In Stock
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SF634 Bearing Product Overview & Core Advantages
The SF634 is a metric single row deep groove ball bearing engineered for high performance in compact spaces. Constructed entirely from stainless steel, it offers excellent corrosion resistance and is designed to primarily handle radial loads. Its open design allows for versatile lubrication options, making it suitable for applications demanding cleanliness and moderate speeds. This bearing is characterized by its ABEC1 precision class and standard internal clearance (MC3), providing reliable operation and consistent performance in a wide range of industrial and precision instruments.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| SF634 | The base model number, defining the core dimensions: 4mm bore, 16mm OD, 5mm width. |
| Open (Seal Type) | No seals or shields, allowing for high-speed operation and custom lubrication schemes. |
| MC3 | Specifies the radial internal clearance group (0.002mm to 0.013mm), suitable for most general applications. |
SF634 Bearing Structural Features & Performance Benefits
- Compact & Lightweight Design: With a width of only 5 mm and a weight of just 5.66 g, the SF634 is ideal for applications where space and weight are critical constraints.
- Stainless Steel Construction: All components, including the rings, balls, and stamped steel cage, are made from stainless steel, providing superior corrosion resistance and durability in harsh environments.
- High-Speed Capability: The open design and optimized stainless steel cage contribute to a high limiting speed of 32,400 rpm, enabling use in demanding high-rotation applications.
- Precision Performance: Manufactured to ABEC1 tolerance class, this bearing ensures smooth and quiet operation, reducing vibration and noise in sensitive equipment.
- Radial Load Capacity: Engineered with a dynamic load rating of 231 lbf and a static load rating of 85 lbf, it provides reliable support for radial forces in compact assemblies.
SF634 Bearing Typical Application Areas
- Precision Instruments: Optical encoders, small medical devices, and laboratory equipment.
- Small Electric Motors: High-speed spindles in drones, miniature fans, and precision DC motors.
- Office Automation Equipment: Printers, scanners, and copiers.
- Food and Beverage Machinery: Conveyor systems and dispensers where corrosion resistance is required.
- Robotics and Automation: Joints and actuators in small-scale robotic arms.
