MR63 Deep Groove Ball Bearing
| MR63 Deep Groove Ball Bearing | |||
|---|---|---|---|
| Part Number | MR63 | Ball Number | 8 |
| d | 3 | Ball Size | 0.8 |
| D1 | 6 | Dynamic Load Co(N) | 230 |
| B | 2.5 | Static Load Cor(N) | 74 |
| R | 0.1 | Grease Speed | 71000 |
| Weight(Kg) | 0.0002 | Oil Speed | 80000 |
MR63 Miniature Deep Groove Ball Bearing | Open, ZZ, 2RS High Precision Bearings
The MR63 deep groove ball bearing is a compact high-precision miniature bearing designed for ultra-small, space-restricted micro mechanical systems. Built with minimized dimensions, finely polished raceways and precision rolling elements, this single-row micro bearing delivers ultra-low friction, low vibration and consistent high-speed operational stability. Optimized for light-load, high-frequency cyclic operation, the MR63 maintains exceptional dimensional accuracy and reliable service life despite its tiny footprint. Available in three mainstream industrial configurations, including open type, MR63ZZ double metal shield type and MR63-2RS double rubber sealed type, this bearing supports five industrial-grade materials to suit economical, sanitary, wear-resistant and corrosive working conditions for a wide range of micro-precision applications.
MR63 Open / ZZ / 2RS Structural Features
MR63 Open Type: The unsealed open structure maximizes air circulation and heat dissipation, effectively preventing thermal buildup during continuous high-speed micro operation. It allows easy grease replenishment and straightforward routine maintenance without increasing rotational resistance. Ideal for clean, dry indoor environments and fully enclosed precision micro machinery, it retains ultra-high running accuracy and stable long-cycle performance for lightweight micro mechanical assemblies.
MR63ZZ Double Metal Shields: Equipped with dual non-contact steel shields, the MR63ZZ miniature bearing effectively blocks fine dry dust, floating micro particles and tiny industrial debris. The non-contact protective design preserves original high-speed smoothness and micro precision with minimal friction loss. Offering stable durability and excellent cost performance, it is widely used in dry working conditions for micro motors, drone components, optical instruments and miniature transmission systems.
MR63-2RS Double Rubber Seals: The fully sealed MR63-2RS model adopts double-sided contact rubber seals to fully isolate moisture, water splashes, oil mist and corrosive fine dust. It securely locks internal micro lubricant to prevent leakage, oxidation and aging, enabling long-term maintenance-free operation. This versatile sealed variant performs reliably in humid, dusty and mildly harsh environments for portable micro devices and outdoor miniature electromechanical equipment.
MR63 Bearing Material Performance
Carbon Steel: High cost-performance industrial material with uniform hardness and stable anti-fatigue properties. It provides consistent wear resistance and smooth high-speed rotation for standard micro precision machinery, ideal for mass production and cost-sensitive miniature equipment projects.
304 Stainless Steel: Food-grade stainless steel with superior rust and oxidation resistance. It prevents micro corrosion in humid and open environments, perfectly suited for sanitary processing equipment and food-safe miniature precision devices.
316 Stainless Steel: Marine-grade corrosion-resistant material with strong tolerance to acid, alkali and salt spray. It withstands coastal humidity and mild chemical exposure, applicable for marine micro instruments and light chemical miniature machinery.
420 Stainless Steel: High-toughness martensitic stainless steel balancing moderate corrosion resistance and high surface hardness. It maintains stable wear resistance and precise dimensional stability during continuous high-speed cyclic operation.
440 Stainless Steel: Ultra-high hardness stainless steel with outstanding abrasion resistance and structural stability. It ensures accurate and stable micro operation under severe wear and corrosive conditions, optimized for high-end precision micro mechanical systems.
Core Advantages And Industrial Applications
The MR63 deep groove ball bearing features an ultra-compact miniature structure, lightweight design, low noise and durable high-speed precision. Three sealing types and five professional material grades fully meet industrial requirements for economy, rust resistance, wear resistance and corrosion resistance. It is widely applied in miniature high-speed motors, drone precision parts, optical instruments, micro transmission components, portable micro tools and compact medical devices. Serving as a critical ultra-small rotary component for space-limited micro systems, the MR63 bearing provides high-efficiency, low-maintenance and ultra-precise rotation solutions for modern miniaturized industrial and commercial precision equipment.
