Material
1. Ring Material: Like many precision bearings, the inner and outer rings of the 682ZZ are fabricated from high-carbon chromium bearing steel (GCr15). Through meticulous heat treatment, this material achieves a hardness of 60-65 HRC, endowing the rings with exceptional wear resistance and the ability to endure continuous mechanical stress, ensuring stable performance under both radial and axial loads.
2. Ball Material: The rolling elements are crafted from chrome steel, selected for its high dimensional accuracy and smooth surface finish. These properties minimize friction between the balls and the raceways, contributing to efficient rotation and extending the bearing's operational lifespan.
3. Cage Material: The cage, responsible for maintaining uniform spacing between the balls, is typically made from low-carbon steel. This material offers a balance of strength and ductility, allowing it to withstand centrifugal forces during high-speed rotation while ensuring the balls remain properly aligned for consistent performance.
4. Shield Material: The defining feature of the 682ZZ is its double-sided metal shields, constructed from cold-rolled steel. These shields are press-fitted into the outer ring, creating a non-contact barrier that effectively blocks dust, dirt, and other solid particles without adding significant friction to the bearing's operation.
Characteristics
1. Superior Heat Resistance: Unlike rubber-sealed bearings, the metal shields of the 682ZZ enable it to operate reliably at elevated temperatures, up to 120°C (and occasionally higher in short-term scenarios). This makes it suitable for applications where proximity to heat sources, such as small motors or lighting components, is unavoidable.
2. Robust Contaminant Protection: The steel shields provide excellent defense against solid debris, preventing particles from entering the bearing and causing premature wear. While they do not offer a liquid-tight seal, their design is highly effective in dry or dusty environments, ensuring consistent performance over time.
3. Low Friction and High-Speed Capability: The non-contact nature of the metal shields minimizes friction, allowing the 682ZZ to achieve high rotational speeds with minimal energy loss. This, combined with precision manufacturing, results in smooth operation, making it ideal for applications requiring fast and accurate movement.
4. Compact Dimensions: With a bore diameter of 2mm, outer diameter of 5mm, and width of 2mm, the 682ZZ maintains a compact profile, suitable for integration into space-constrained devices such as micro-mechanisms, small-scale robotics, and precision instruments.
5. Durable and Maintenance-Friendly: The all-steel construction enhances the bearing's durability, enabling it to withstand vibration and repeated loads. Additionally, the metal shields are less prone to degradation over time compared to rubber seals, reducing the need for frequent maintenance in many applications.
Applications
1. Small Motors and Drives: The 682ZZ is widely used in miniature motors, including those in power tools, hobby drones, and small conveyor systems. Its heat resistance and high-speed capability make it well-suited for the continuous operation of these motors, even when they generate significant heat.
2. Precision Machinery: In devices like 3D printer extruders, laser pointers, and optical scanners, the 682ZZ plays a critical role. Its compact size and low friction ensure precise movement of components, contributing to the accuracy and reliability of these machines.
3. Automotive Electronics: Within automotive systems, such as dashboard gauges, sensor mechanisms, and small cooling fans, the 682ZZ thrives. Its ability to withstand temperature fluctuations and resist dust makes it a durable choice for the demanding automotive environment.
4. Household Appliances: Components in small appliances like coffee grinders, blenders, and hair dryers often utilize the 682ZZ. Its robust construction and heat resistance allow it to handle the rigors of daily use, ensuring these appliances operate smoothly over time.
5. Industrial Automation: In miniature actuators, solenoids, and small robotic arms used in industrial automation, the 682ZZ provides reliable rotation. Its compact size and resistance to contaminants make it suitable for integration into tight spaces within automated systems.
| Part Number | 682ZZ |
| Characteristics |
| System of Measurement | Metric |
| Bearing Type | Ball |
| Seal Type | Shielded |
| Inner Ring Type | Standard |
| For Load Direction | Radial |
| Construction | Single Row |
| Ball Qty | 6 |
| Tolerance Class | ABEC1 |
| Dimensions |
| Bore Dia | 2 mm |
| Bore Dia Tolerance | -0.008mm to 0 |
| Outer Dia | 5 mm |
| Outer Dia Tolerance | -0.008mm to 0 |
| Width | 2.3 mm |
| Width Tolerance | -0.12mm to 0 |
| Ball Dia | 0.8 mm |
| Radial Clearance | 0.005mm to 0.01 mm |
| Radial Clearance Trade No | MC3 |
| Material |
| Ring Material | Chrome Steel |
| Ball Material | Chrome Steel |
| Cage Material | Carbon Steel |
| Shield Material | Carbon Steel |
| Performance |
| Dynamic Radial Load | 32 lbf |
| Static Radial Load | 9 lbf |
| Max Speed (X1000 rpm) | 85 |
| Temperature Range | -30° to 110 °C |
| Properties |
| Lubrication | Required |
| RoHS | Compliant |
| REACH | Compliant |
| Weight | 0.2 g |
