Material
The bearing’s inner ring, outer ring, and rolling elements are crafted from high-quality 52100 chromium steel, ensuring excellent hardness, wear resistance, and dimensional precision to cope with micro-scale rotational demands. The 2RS seals are made of nitrile rubber (NBR), which offers good elasticity, oil resistance, and water tightness, effectively preventing lubricant leakage and blocking external moisture.
Characteristics
1. Enhanced moisture resistance: The rubber seals form a flexible barrier against water splashes, condensation, and fine liquid droplets, making it suitable for environments like bathroom devices or outdoor mini-equipment exposed to dew.
2. Low noise operation: The damping property of rubber reduces vibration and friction-induced noise, perfect for devices used in quiet settings such as personal care tools or medical equipment.
3. Lubrication retention: The seals tightly lock in pre-applied lubricating grease, minimizing the need for frequent maintenance, especially in hard-to-reach micro-assemblies.
4. Compact adaptability: Maintaining the ultra-small dimensions of the MR series, it fits seamlessly into space-constrained designs while providing reliable performance under light to moderate loads.
Applications
1. Personal care devices: Such as electric toothbrushes, facial cleansing brushes, and waterproof shavers, where protection against water ingress is crucial.
2. Medical equipment: Including small liquid pumps for drug delivery systems, portable nebulizers, and moisture-resistant sensors.
3. Consumer electronics: Like waterproof Bluetooth earbuds with rotating components, moisture-resistant smartwatch modules, and miniaturized water quality detectors.
4. Household mini-appliances: Such as small humidifiers, travel-sized coffee makers, and portable steamers, leveraging its resistance to water vapor and condensation.
| Part Number | MR63 2RS |
| Characteristics |
| System of Measurement | Metric |
| Bearing Type | Ball |
| Seal Type | Sealed |
| Inner Ring Type | Standard |
| For Load Direction | Radial |
| Construction | Single Row |
| Ball Qty | 8 |
| Tolerance Class | ABEC1 |
| Dimensions |
| Bore Dia | 3 mm |
| Bore Dia Tolerance | -0.008mm to 0 |
| Outer Dia | 6 mm |
| Outer Dia Tolerance | -0.008mm to 0 |
| Width | 2.5 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 | Nitrile Rubber |
| Performance |
| Dynamic Radial Load | 40 lbf |
| Static Radial Load | 13 lbf |
| Max Speed (X1000 rpm) | 71 |
| Temperature Range | -30° to 110 °C |
| Properties |
| Lubrication | Required |
| RoHS | Compliant |
| REACH | Compliant |
| Weight | 0.2 g |
