MR93 Deep Groove Ball Bearing
| MR93 Deep Groove Ball Bearing | |||
|---|---|---|---|
| Part Number | MR93 | Ball Number | 7 |
| d | 3 | Ball Size | 2.381 |
| D1 | 9 | Dynamic Load Co(N) | 634 |
| B | 2.5 | Static Load Cor(N) | 219 |
| R | 0.2 | Grease Speed | 56000 |
| Weight(Kg) | 0.00095 | Oil Speed | 63000 |
MR93 Miniature Deep Groove Ball Bearing | Open, ZZ, 2RS High Precision Bearings
The MR93 deep groove ball bearing is a high-precision miniature bearing designed for ultra-compact, space-limited micro mechanical systems requiring stable high-speed rotation and long service life. Featuring optimized compact dimensions, finely polished raceways and precision rolling elements, this single-row micro bearing delivers ultra-low friction, minimal vibration and consistent operational stability. Engineered for light-load, high-frequency cyclic operation, the MR93 maintains superior dimensional accuracy and structural rigidity despite its tiny size. Available in three standard industrial configurations, open type, MR93ZZ double metal shield type and MR93-2RS double rubber sealed type, this bearing supports five industrial-grade materials to accommodate economical, sanitary, high-wear and corrosive working conditions for diverse micro-precision applications.
MR93 Open / ZZ / 2RS Structural Features
MR93 Open Type: The unsealed open structure enables unobstructed air circulation and efficient heat dissipation, effectively preventing thermal accumulation during prolonged high-speed micro operation. It allows tool-free grease replenishment and simple routine maintenance without extra rotational resistance. Ideal for clean, dry indoor environments and fully enclosed micro precision machinery, it maintains ultra-high running accuracy and stable long-cycle performance for lightweight micro assemblies.
MR93ZZ Double Metal Shields: Equipped with dual non-contact steel shields, the MR93ZZ miniature bearing reliably blocks fine dry dust, floating micro particles and miniature industrial debris. The non-contact protective design preserves original high-speed smoothness and micro precision with negligible friction loss. Offering excellent durability and cost performance, it is widely used in dry working scenarios for micro high-speed motors, drone components, optical instruments and miniature transmission systems.
MR93-2RS Double Rubber Seals: The fully sealed MR93-2RS variant adopts double-sided contact rubber seals to comprehensively 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 model operates stably in humid, dusty and mildly harsh environments for portable micro devices and outdoor miniature electromechanical equipment.
MR93 Bearing Material Performance
Carbon Steel: High cost-performance industrial base material with uniform hardness and stable anti-fatigue properties. It delivers reliable wear resistance and smooth high-speed rotation for standard micro precision machinery, perfect for mass production and cost-sensitive miniature equipment projects.
304 Stainless Steel: Food-grade stainless steel with excellent rust and oxidation resistance. It resists micro corrosion in humid and open environments, ideal for food processing accessories and sanitary micro precision equipment.
316 Stainless Steel: Marine-grade corrosion-resistant material with strong tolerance to acid, alkali and salt spray erosion. It withstands coastal humidity and mild chemical exposure, suitable 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 superior abrasion resistance and structural stability. It sustains accurate and stable micro operation under severe wear and corrosive conditions, optimized for high-end micro precision mechanical systems.
Core Advantages And Industrial Applications
The MR93 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 demands for economy, rust resistance, wear resistance and corrosion resistance. It is extensively applied in miniature high-speed motors, drone precision parts, optical instruments, micro transmission components, portable micro power tools and compact medical devices. As a critical ultra-small rotary component for space-constrained micro systems, the MR93 bearing provides high-efficiency, low-maintenance and ultra-precise rotation solutions for modern miniaturized industrial and commercial precision equipment.
