Material
The bearing’s core components—inner ring, outer ring, and rolling elements—are constructed from high-grade 52100 chromium steel, ensuring exceptional hardness, wear resistance, and dimensional precision to withstand the stresses of micro-scale high-speed rotation. The double metal shields are made of zinc-plated steel, providing robust defense against dust and dry particulate matter while maintaining compatibility with elevated temperatures.
Characteristics
1. Enhanced dust protection for dry environments: The rigid metal shields form an effective barrier against dust, lint, and small dry particles, making it ideal for clean, low-humidity settings such as electronics enclosures or precision instrument housings.
2. High rotational efficiency: The thin, low-friction metal shields minimize resistance, enabling smoother operation at higher speeds compared to rubber-sealed bearings, reducing heat buildup during prolonged use.
3. Temperature resilience: The steel shields and steel body tolerate higher temperatures (up to 110°C), suitable for micro-devices with moderate heat generation from continuous high-speed rotation.
4. Ultra-compact durability: Retaining the miniature dimensions of the MR series, it fits seamlessly into space-constrained assemblies while offering reliable performance under light to moderate radial loads.
Applications
1. Micro-motors: Such as high-speed spindle motors in miniature drones, tiny drive units in model aircraft, and vibration motors in precision haptic devices, where rotational efficiency is critical.
2. Optical equipment: Including lens adjustment mechanisms in compact cameras, mirror rotation components in microscopes, and laser alignment systems, benefiting from dust protection and stable high-speed rotation.
3. Consumer electronics: Like rotating parts in high-speed camera shutters, micro fans in VR headsets, and drive mechanisms in portable scanners, leveraging its low friction and compact design.
4. Precision instruments: Such as gyroscopes in miniaturized navigation sensors, tiny rotating components in analytical devices, and actuators in micro-robotics, where dry-environment reliability and speed are paramount.
| Part Number | MR83ZZ |
| Characteristics |
| System of Measurement | Metric |
| Bearing Type | Ball |
| Seal Type | Shielded |
| Inner Ring Type | Standard |
| For Load Direction | Radial |
| Construction | Single Row |
| Ball Qty | 7 |
| Tolerance Class | ABEC1 |
| Dimensions |
| Bore Dia | 3 mm |
| Bore Dia Tolerance | -0.008mm to 0 |
| Outer Dia | 8 mm |
| Outer Dia Tolerance | -0.008mm to 0 |
| Width | 3 mm |
| Width Tolerance | -0.12mm to 0 |
| Ball Dia | 1.2 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 | 76 lbf |
| Static Radial Load | 25 lbf |
| Max Speed (X1000 rpm) | 60 |
| Temperature Range | -30° to 110 °C |
| Properties |
| Lubrication | Required |
| RoHS | Compliant |
| REACH | Compliant |
| Weight | 0.67 g |
