681x
600 Series Miniature Bearings
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Part No.
Part No.
681x
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.1 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
4 mm
Outside diameter tolerance
-0.008mm to 0
Width
1.2 mm
Width tolerance
-0.12mm to 0
Inner Ring Dimensions
Inner ring type
Standard
Ball & Washer Dimensions
Ball diameter
0.6 mm
Ball quantity
7
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
21 lbf
Radial static load rating
6 lbf
Limiting speed
100 X 1000 rpm
Lubrication
Required
Radial internal clearance
MC3
Radial internal clearance
0.002mm to 0.013mm
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Stainless Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 12.25
/ each
In Stock
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681x Bearing Product Overview & Core Advantages
The 681x is a miniature deep groove ball bearing designed for applications requiring compact dimensions and reliable performance. As a single row radial bearing, it excels in handling primarily radial loads while offering high-speed capabilities. Its open design allows for versatile lubrication options, making it suitable for high-precision instruments and compact mechanisms where space is at a premium. This bearing is characterized by its ABEC1 precision class and is manufactured from high-grade chrome steel for durability and consistent operation.
681x Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| 68 | Series designation indicating a very small cross-section and ultra-miniature size. |
| 1 | Bore diameter code. In this series, "1" corresponds to a 1.5 mm bore diameter. |
| x (Open) | No seal or shield suffix, indicating an open bearing. This allows for custom lubrication and higher potential speeds but requires a clean operating environment. |
681x Bearing Structural Features & Performance Benefits
- High-Speed Performance: The stainless steel cage and optimized internal geometry contribute to a high limiting speed of 100,000 rpm, making it an excellent high-speed bearing for miniature applications.
- Radial Load Capacity: The deep groove raceway and complement of 7 precision balls enable efficient handling of radial loads with a dynamic load rating of 21 lbf.
- Precision & Stability: Manufactured to ABEC1 tolerance class and featuring a controlled MC3 radial internal clearance (0.002mm to 0.013mm), this bearing ensures smooth, low-vibration, and precise rotation.
- Material Integrity: Constructed from chrome steel rings and balls, the bearing offers high hardness and wear resistance. The stainless steel cage provides excellent corrosion resistance and mechanical strength.
- Compact & Lightweight: With dimensions of just 1.5mm (bore) x 4mm (OD) x 1.2mm (width) and a weight of only 0.1g, it is ideal for applications with severe space and weight constraints.
681x Bearing Typical Application Areas
This miniature deep groove ball bearing is engineered for use in:
- Precision Instruments: Small DC motors, optical encoders, and laboratory equipment.
- Consumer Electronics: Small fans, miniature drones, and handheld electronic devices.
- Medical Devices: Dental handpieces, miniature pumps, and surgical tools.
- Office Automation: Printers, scanners, and precision guidance mechanisms.
