MR128 Deep groove ball bearing
| MR128 Deep groove ball bearing | |||
|---|---|---|---|
| Part Number | MR128 | Ball Number | 12 |
| d | 8 | Ball Size | 1.2 |
| D1 | 12 | Dynamic Load Co(N) | 545 |
| B | 2.5 | Static Load Cor(N) | 274 |
| R | 0.15 | Grease Speed | 40000 |
| Weight(Kg) | 0.00071 | Oil Speed | 48000 |
MR128 Miniature Deep Groove Ball Bearing | Open, ZZ, 2RS High Precision Bearings
The MR128 deep groove ball bearing is a high-precision miniature bearing engineered for ultra-compact, space-constrained micro mechanical systems requiring stable high-speed performance, low noise and long service life. Built with precise miniaturized dimensions, ultra-smooth polished raceways and premium rolling elements, this single-row micro bearing delivers ultra-low friction, minimal vibration and consistent dimensional stability. Optimized for light-load, high-frequency cyclic operation, the MR128 features rigid structural design and reliable wear resistance, perfectly suited for modern miniaturized precision electromechanical and automated micro equipment. Available in three mainstream industrial configurations including open type, MR128ZZ double metal shield type and MR128-2RS double rubber sealed type, this bearing supports five industrial-grade materials to accommodate economical, sanitary, high-wear and corrosive working conditions for versatile micro-precision applications.
MR128 Open / ZZ / 2RS Structural Features
MR128 Open Type: The unsealed open structure enables unobstructed air circulation and efficient heat dissipation, effectively preventing thermal buildup during continuous high-speed micro operation. It allows straightforward grease replenishment and tool-free routine maintenance without increasing rotational resistance. Ideal for clean, dry indoor environments and fully enclosed micro precision machinery, it maintains exceptional running accuracy and stable long-cycle operational performance for lightweight micro assemblies.
MR128ZZ Double Metal Shields: Equipped with dual non-contact steel shields, the MR128ZZ miniature bearing effectively blocks dry fine dust, floating micro particles and tiny industrial debris. The non-contact protective design preserves original high-speed smoothness and micro precision with negligible friction loss. Offering excellent durability and cost efficiency, it is widely used in dry industrial scenarios for micro high-speed motors, drone components, optical instruments and miniature transmission systems.
MR128-2RS Double Rubber Seals: The fully sealed MR128-2RS variant 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 model performs reliably in humid, dusty and mildly harsh environments for portable micro devices and outdoor miniature electromechanical equipment.
MR128 Bearing Material Performance
Carbon Steel: High cost-performance industrial material with uniform hardness and stable anti-fatigue properties. It delivers consistent wear resistance and smooth high-speed rotation for standard micro precision machinery, ideal for mass production and budget-friendly 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 food processing accessories and sanitary-grade micro precision devices.
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, 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 micro 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 micro precision mechanical systems.
Core Advantages And Industrial Applications
The MR128 deep groove ball bearing features an ultra-compact miniature structure, lightweight design, ultra-quiet operation 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 extensively applied in miniature high-speed motors, drone precision parts, optical precision instruments, micro transmission components, portable micro power tools and compact medical devices. Serving as a critical ultra-small rotary component for space-limited micro systems, the MR128 bearing provides high-efficiency, low-maintenance and ultra-precise rotation solutions for modern miniaturized industrial and commercial precision equipment.
