681 Deep Groove Ball Bearing
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Request Quote| Part Number | 681 |
| Category | Metric Size Standard Miniature Ball Bearings |
| Brand | JMP® |
| Interchangeable With | NB |
| Bore Diameter | 1.0000 mm |
| Outer Diameter | 3.0000 mm |
| Width | 1.0000 mm |
| Bore Tolerance | -0.008mm to 0 |
| Outer Tolerance | -0.008mm to 0 |
| Width Tolerance | -0.12mm to 0 |
| Chamfer Dimension | 0.15 mm |
| Dynamic Radial Load | 18 lbf |
| Static Radial Load | 5 lbf |
| Construction | Single Row |
| Seal Type | Open |
| Bearing Type | Ball |
| Load Direction | Radial |
| System of Measurement | Metric |
| Ring Material | Chrome Steel |
| Ball / Roller Material | Chrome Steel |
| Cage Material | Stainless Steel |
| Ball Diameter | 0.6 |
| Ball Quantity | 6 |
| Reference Speed | 130,000 rpm |
| Limiting Speed (Grease) | 130,000 rpm |
| Limiting Speed (Oil) | — |
| Radial Clearance | MC3 |
| Tolerance Class | ABEC1 |
| Bore Tolerance | -0.008mm to 0 |
| Outer Ring Tolerance | -0.008mm to 0 |
| Width Tolerance | -0.12mm to 0 |
| Temperature Range | -30° to 110 °C |
| Max Temperature | 110 °C |
| RoHS | Compliant |
| REACH | Compliant |
| Weight | 0.0300 g |
| Brand | Equivalent |
|---|---|
| NB | 681 |
The 681 is a high-quality Deep Groove Ball Bearing with bore diameter of 1.0000 mm, outer diameter of 3.0000 mm, and width of 1.0000 mm.
With a dynamic radial load rating of 18 lbf and static load rating of 5 lbf, the 681 is engineered to handle demanding operating conditions. It supports speeds up to 130,000 rpm, making it suitable for high-speed applications.
- Reliable load capacity for general industrial applications
- High-speed capability up to 130,000 rpm for versatile operation
- Open design for easy relubrication and low friction operation
- Precision manufacturing to ISO standards ensures consistent quality
- Fully interchangeable with major international brands (SKF, NSK, FAG, NTN)
The 681 is available in Open (no seal), ZZ (metal shield), and 2RS (rubber seal) configurations. Open bearings offer higher speed ratings and lower friction, while sealed versions provide better contamination protection and reduced maintenance requirements.
JMP Bearings manufactures the 681 in various tolerance classes including ABEC-1 (standard), ABEC-3, ABEC-5 (precision), and ABEC-7 (high precision). Please contact us for specific tolerance class availability and pricing.
The 681 typically uses lithium-based grease (e.g., ISO VG 68) for general applications. For high-temperature or high-speed applications, synthetic greases such as polyurea-based lubricants are recommended. Contact our engineering team for application-specific lubrication guidance.
JMP Bearings offers flexible ordering - sample quantities are available from 1 piece. For bulk orders, we provide tiered pricing starting at 100, 500, and 1000+ pieces. Contact us for a custom quote tailored to your volume.
For standard 681 applications, shaft tolerance is typically k5 or j6, and housing tolerance is typically H7 or J6. Exact tolerance selections depend on load conditions, speed, and operating temperature. Refer to ISO 286 or consult our engineering support for detailed recommendations.
