SF634zz
SF Series Stainless Steel Flanged Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
SF634zz
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
5.98 g
Tolerance class
ABEC1
Seal type
Shielded
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
Shield material
300 Series 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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SF634zz Bearing Product Overview & Core Advantages
The SF634zz is a single row deep groove ball bearing designed for radial load applications requiring compact dimensions and reliable performance. Constructed entirely from stainless steel, it offers excellent corrosion resistance. Its key advantages include a shielded design for contaminant protection, a high limiting speed of 32,400 rpm, and compliance with ROHS and REACH standards, making it suitable for precision instruments and small machinery where space is limited and reliability is critical.
SF634zz Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| SF634 | Basic bearing designation, defining the bearing dimensions (4mm bore, 16mm OD). |
| zz | Indicates the bearing is fitted with shielded seals on both sides. This provides effective protection against solid contaminants while maintaining a low friction torque. |
SF634zz Bearing Structural Features & Performance Benefits
- Compact & Lightweight Design: With a width of only 5mm and a weight of 5.98g, this bearing is ideal for applications with severe space and weight constraints.
- Corrosion Resistance: All components, including rings, balls, cage, and shields, are made from stainless steel, ensuring long service life in humid or corrosive environments.
- High-Speed Capability: The optimized design and stainless steel cage contribute to a high limiting speed of 32,400 rpm, suitable for demanding high-speed operations.
- Shielded Protection: The non-contact ZZ shields help retain lubrication and exclude larger contaminants, enhancing bearing life with minimal impact on speed performance.
- Precision Performance: Manufactured to ABEC1 tolerance class with a controlled radial internal clearance (MC3 group), ensuring consistent and smooth running.
SF634zz Bearing Typical Application Areas
This versatile miniature bearing is commonly used in:
- Small Electric Motors and Gearboxes
- Precision Instruments and Optical Devices
- Office Automation Equipment (Printers, Scanners)
- Medical Devices and Laboratory Equipment
- Radio Control Models and Drones
- Food Processing Machinery (due to stainless steel construction)
