| Part Number | 681 |
| System of Measurement | Metric |
| Bearing Type | Ball |
| For Load Direction | Radial |
| Construction | Single Row |
| Inner Ring Type | Standard |
| Seal Type | Open |
| Bore Dia | 1 mm |
| Bore Dia Tolerance | -0.008mm to 0 |
| Outer Dia | 3 mm |
| Outer Dia Tolerance | -0.008mm to 0 |
| Width | 1 mm |
| Width Tolerance | -0.12mm to 0 |
| Ring Material | Chrome Steel |
| Ball Material | Chrome Steel |
| Cage Material | Stainless Steel |
| Dynamic Radial Load | 18 lbf |
| Static Radial Load | 5 lbf |
| Max Speed (X1000 rpm) | 130 |
| Lubrication | Required |
| Temperature Range | -30° to 110 °C |
| Tolerance Class | ABEC1 |
| Radial Clearance Trade No | MC3 |
| Radial Clearance | 0.005mm to 0.01 mm |
| RoHS | Compliant |
| REACH | Compliant |
| Ball Dia | 0.6 mm |
| Ball Qty | 6 |
| Weight | 0.03 g |
Application Areas
Electronics: It is used in components like small - sized motors in electronics devices, hard disk drives (HDDs), and DVD spindles. In HDDs, for example, the 681 bearing enables the smooth rotation of the spindle, ensuring accurate data read and write operations.
Medical Field: Applied in medical devices such as pulmonary assist devices, where precise and smooth rotation is crucial for proper functioning. Its small size and reliable performance make it suitable for use in miniaturized medical equipment.
Instrumentation: Found in high - precision measuring equipment and sensors. The 681 bearing's low - noise operation and high - speed capabilities ensure reliable performance in these applications, helping to maintain the accuracy of the measuring instruments.
Consumer Goods: Widely used in toys, clocks, and decorative items. In clocks, its small size and smooth rotation contribute to accurate timekeeping, while in toys, it provides reliable movement in small - scale mechanisms.
