S691x
600 Series Stainless Steel Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S691x
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.2 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
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:
$ 14.7
/ each
In Stock
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S691x Bearing Product Overview & Core Advantages
The S691x is a miniature deep groove ball bearing designed for applications demanding compact size and reliable performance. Constructed entirely from stainless steel, it offers excellent corrosion resistance. As a single row bearing with an open design, it is optimized for high-speed operation and primarily handles radial loads. Its extremely small dimensions, with a bore of just 1.5 mm and a weight of only 0.2 g, make it an ideal solution for precision instruments and compact mechanisms where space and weight are critical constraints.
S691x Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S691 | Indicates the core bearing series, defining the basic dimensions and internal geometry. |
| x | A placeholder for the shield or seal suffix. The "Open" specification means no shield or seal is present, allowing for higher limiting speeds and easy re-lubrication. |
S691x Bearing Structural Features & Performance Benefits
- High-Speed Capability: The open construction and stainless steel cage minimize friction and drag, enabling a high limiting speed of 76,500 rpm. This makes it suitable for very fast-rotating spindles and motors.
- Corrosion Resistance: Manufactured entirely from stainless steel (rings, balls, and cage), this bearing is well-suited for applications exposed to moisture or corrosive environments, ensuring long-term reliability.
- Precision & Low Noise: Built to ABEC1 tolerance class with a controlled radial internal clearance (MC3 / 0.002mm to 0.013mm), it provides smooth and quiet operation, which is essential for sensitive electronic and medical devices.
- Compact & Lightweight Design: With ultra-small bearing dimensions (1.5mm bore, 5mm OD, 2mm width) and a minimal weight of 0.2 g, it enables the design of smaller and lighter end products.
S691x Bearing Typical Application Areas
- Precision Medical Devices: Surgical hand tools, dental drills, and miniature pumps.
- Small Motors and Gearboxes: Stepper motors, coreless motors, and miniature DC motors used in drones, robotics, and optical drives.
- Instrumentation and Sensors: High-speed encoders, gyroscopes, and precision measuring equipment.
- Office Automation Equipment: Small fans, scanners, and printers.
- Electronic Shutters and Actuators: Camera mechanisms and miniature positioning systems.
