Material
It is made from high-carbon chromium alloy steel, processed through precise heat treatment to achieve optimal hardness and wear resistance. This material ensures the bearing can withstand continuous rotational stress, maintaining structural stability even in prolonged use, while its fine microstructure reduces the risk of premature fatigue.
Features
• Double rubber seals ("2RS"): These flexible seals provide effective protection against water, oil, and fine particles, forming a tighter barrier in humid or slightly wet environments compared to metal shields, and helping retain internal lubrication longer.
• Low friction performance: The precision-machined raceways and rolling elements minimize contact resistance, enabling quiet and smooth rotation, which is ideal for noise-sensitive devices.
• Compact dimensions: With an outer diameter of around 8mm, it fits seamlessly into small-scale assemblies without compromising on load-bearing capability for its size.
• Versatile sealing: The rubber seals offer better tolerance to minor vibrations and temperature fluctuations, ensuring consistent performance in varying conditions.
Applications
• Miniature water pumps: Used in small aquarium filters and desktop water cooling systems, where resistance to water exposure is crucial.
• Personal care devices: Integrated into electric toothbrushes and facial cleansing tools, handling occasional contact with water.
• Medical gadgets: Employed in portable nebulizers and small blood pressure monitor motors, requiring reliable operation in hygiene-sensitive environments.
• Small household appliances: Found in humidifier rotors and mini food processors, supporting smooth motion in moisture-prone settings.
| Part Number | MR72 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 | 7 |
| Tolerance Class | ABEC1 |
| Dimensions |
| Bore Dia | 2 mm |
| Bore Dia Tolerance | -0.008mm to 0 |
| Outer Dia | 7 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 | Nitrile Rubber |
| Performance |
| Dynamic Radial Load | 74 lbf |
| Static Radial Load | 23 lbf |
| Max Speed (X1000 rpm) | 63 |
| Temperature Range | -30° to 110 °C |
| Properties |
| Lubrication | Required |
| RoHS | Compliant |
| REACH | Compliant |
| Weight | 0.53 g |
