SF693 2rs
SF Series Stainless Steel Flanged Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
SF693 2rs
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.94 g
Tolerance class
ABEC1
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
Inner Ring Dimensions
Inner ring type
Standard
Outer Ring Dimensions
Flange outer diameter
9.5 mm
Flange thickness
0.9 mm
Ball & Washer Dimensions
Ball diameter
1.588 mm
Ball quantity
6
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
96 lbf
Radial static load rating
29 lbf
Limiting speed
54 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
Nitrile Rubber
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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SF693 2rs Bearing Product Overview & Core Advantages
The SF693 2RS is a metric miniature ball bearing designed for precision applications requiring compact dimensions and reliable performance. As a single row deep groove ball bearing with integral rubber seals (2RS), it offers excellent protection against contaminants while retaining lubrication. Constructed entirely from stainless steel, it provides superior corrosion resistance. Its core advantages include effective radial load capacity, suitability for moderate speeds, and long service life in demanding environments, making it an ideal choice for high-reliability miniature assemblies.
SF693 2rs Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| SF693 | The base bearing designation, indicating a specific series with a 3mm bore, 8mm outside diameter, and 4mm width. |
| 2RS | Signifies that the bearing is equipped with contact rubber seals on both sides. This provides effective protection against dust and moisture ingress and helps retain lubricant, contributing to maintenance-free operation. |
SF693 2rs Bearing Structural Features & Performance Benefits
- Robust Construction & Corrosion Resistance: The bearing rings, balls, and cage are manufactured from stainless steel, ensuring excellent performance in corrosive or wash-down environments and contributing to a long operational lifespan.
- Effective Sealing: The Nitrile rubber (2RS) seals make direct contact with the inner ring, providing a high degree of protection from particulate and fluid contaminants. This design is crucial for maintaining performance in unclean conditions.
- Precision & Load Capacity: Manufactured to ABEC1 tolerance class with a MC3 radial internal clearance, this bearing offers reliable and smooth operation. It is rated for a dynamic load of 96 lbf and a static load of 29 lbf, suitable for its compact size.
- Compact & Lightweight Design: With a total weight of only 0.94 grams, this bearing is ideal for applications where minimizing mass and space is critical.
SF693 2rs Bearing Typical Application Areas
- Small Precision Motors: Used in stepper motors, DC micromotors, and fan motors.
- Medical and Dental Equipment: Ideal for handheld surgical tools, dental handpieces, and pump drives requiring corrosion resistance.
- Office Automation: Found in printers, scanners, and copiers for paper feed and roller mechanisms.
- Instrumentation and Control Systems: Suitable for encoders, sensors, and small gearboxes.
- Radio Control Models and Drones: Used in motor supports and small transmission systems.
