SF691x
SF Series Stainless Steel Flanged Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
SF691x
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.26 g
Tolerance class
ABEC1
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
1.5 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
5 mm
Outside diameter tolerance
-0.008mm to 0
Width
2 mm
Width tolerance
-0.12mm to 0
Inner Ring Dimensions
Inner ring type
Standard
Outer Ring Dimensions
Flange outer diameter
6.5 mm
Flange thickness
0.6 mm
Ball & Washer Dimensions
Ball diameter
1 mm
Ball quantity
6
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
29 lbf
Radial static load rating
8 lbf
Limiting speed
76.5 X 1000 rpm
Lubrication
Required
Radial internal clearance
MC3
Radial internal clearance
0.002mm to 0.013mm
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:
$ 19.4
/ each
In Stock
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SF691x Bearing Product Overview & Core Advantages
The SF691x is a metric miniature deep groove ball bearing engineered for precision applications requiring compact design and reliable performance. Constructed entirely from stainless steel, it offers excellent corrosion resistance. As a single row, open type bearing, it is primarily designed to handle radial loads efficiently. Its exceptionally small dimensions (1.5mm bore, 5mm OD) and low weight (0.26g) make it ideal for space-constrained, high-speed mechanisms. The bearing features an integral flange for secure mounting and positioning, enhancing operational stability.
SF691x Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| SF691x | Series designation for a specific range of flanged miniature ball bearings. |
| Open | No integral seals or shields. Allows for higher limiting speeds but requires a clean environment or external sealing. |
| MC3 | Specifies the radial internal clearance group (0.002mm to 0.013mm), suitable for applications with moderate temperature variations. |
| ABEC1 | The tolerance class defining standard precision levels for bore, outside diameter, and width. |
SF691x Bearing Structural Features & Performance Benefits
- Compact & Lightweight Design: With a bore diameter of just 1.5mm and a width of 2mm, this bearing is a critical component for miniaturized devices, contributing to overall weight and size reduction.
- High-Speed Capability: The open design and optimized internal geometry, including 6 precision stainless steel balls, enable a very high limiting speed of 76,500 rpm, making it suitable for high-speed spindles and small motors.
- Robust Flange: The integral flange (6.5mm outer diameter) provides secure axial location and simplifies housing design, preventing bearing creep during operation and ensuring high rigidity.
- Corrosion Resistance: Manufactured entirely from stainless steel (rings, balls, and cage), the bearing is well-suited for applications exposed to moisture or corrosive environments, and complies with ROHS and REACH directives.
- Precision Performance: The ABEC1 tolerance class and controlled radial internal clearance ensure consistent, smooth running and low noise operation, which is vital for sensitive instrumentation.
SF691x Bearing Typical Application Areas
- Precision Instrumentation: Optical encoders, gyroscopes, and medical devices.
- Small Motors & Drives: Stepper motors, coreless motors, and miniature DC motors.
- Office Automation Equipment: Printers, scanners, and copiers.
- Robotics: Joints and actuators in small-scale robotic arms and drones.
- Consumer Electronics: High-speed cooling fans, miniature gearboxes, and precision mechanisms.
