MR72 Deep Groove Ball Bearings
| MR72 Deep Groove Ball Bearings | |||
|---|---|---|---|
| Part Number | MR72 | Ball Number | 7 |
| d | 2 | Ball Size | 1.20 |
| D1 | 7 | Dynamic Load Co(N) | 386 |
| B | 2.5 | Static Load Cor(N) | 129 |
| R | 0.15 | Grease Speed | 63000 |
| Weight(Kg) | 0.00053 | Oil Speed | 75000 |
MR72 Bearing | Open / ZZ / RS Seals | Lightweight Miniature Bearings for High-Speed Micro Devices
The MR72 bearing is a lightweight metric miniature deep groove ball bearing with standard 2x7x2.5mm dimensions, tailored for high-speed micro equipment and ultra-compact installation layouts. Featuring refined internal raceway design, low inertial rotation and stable radial load capacity, this tiny bearing delivers consistent performance during frequent startup and high-cycle operation. Offered in Open, ZZ and RS sealing options with five industrial-grade material grades, MR72 bearings provide flexible protective and durable solutions for high-precision micro mechanical systems across diverse working environments.
MR72 Bearing Three Seal Type Functional Traits
MR72 Open Bearing: Adopts a seal-free open structure with maximum ventilation efficiency, achieving rapid heat dissipation during continuous high-speed operation. It features ultra-low rotational resistance and supports regular grease replenishment, enabling flexible routine maintenance. This open variant is ideal for controlled clean workshops, precision micro rotating modules and high-speed laboratory testing equipment that requires stable heat dissipation performance.
MR72ZZ Bearing (Double Metal Shields): Built with dual-sided non-contact metal shields to block dry airborne dust, fine industrial particles and floating micro debris. The friction-free shielding structure never hinders running precision or speed, delivering excellent thermal stability and anti-aging performance. It is widely adopted in dry indoor scenarios such as micro fan units, compact sensor devices, drone accessories and portable smart electronic hardware.
MR72RS Bearing (Double Rubber Seals): Equipped with dual-lip elastic rubber seals for full perimeter isolation against moisture, fine dust and minor liquid splashes. It effectively locks internal lubrication and prevents external contamination, realizing long-term maintenance-free service. Perfect for versatile complex conditions including humid processing workshops, outdoor micro monitoring gadgets and automated miniature transmission assemblies.
MR72 Bearing Material Attributes And Target Industry Applications
Bearing Steel: Premium high-hardness bearing steel with excellent anti-fatigue and wear-resistant properties. It maintains stable radial load performance during long-term high-speed cycling, offering outstanding cost-performance. It is the mainstream choice for general micro motors, daily compact machinery and conventional precision transmission accessories.
304 Stainless Steel: Delivers reliable atmospheric rust resistance and oxidation stability, adapting to normal temperature and humid ambient conditions. With balanced performance and affordable cost, it is widely used in consumer micro electronics, light industrial miniature fittings and general low-load civilian precision equipment.
420 Stainless Steel: Integrates high hardness and mechanical toughness with mild chemical corrosion resistance. It retains smooth and accurate rotation under frequent intermittent operation, specially suited for portable optical devices, miniature medical instruments and compact high-end intelligent mechanical parts.
440 Stainless Steel: Features extreme surface hardness and superior abrasion resistance, with strong tolerance to medium corrosive industrial environments. It extends service life for high-precision automation micro components, tiny hydraulic matching parts and stable high-cycle transmission systems.
316 Stainless Steel: Boasts top-tier salt spray, acid and alkali corrosion resistance, capable of resisting harsh corrosive working scenarios. It serves as the optimal material for marine micro fittings, food sanitation processing equipment, chemical experimental instruments and sterile medical precision devices.
Unique Product Advantages: The MR72 miniature bearing stands out with lightweight structure, high-speed adaptability and multi-dimensional customization of seals and materials. It features low inertia, mute operation and strong environmental compatibility, widely applied in precision instrumentation, intelligent electronics, industrial automation, medical hygiene, food processing and marine supporting industries to meet diverse high-cycle micro-precision transmission demands.
