MR137 Deep groove ball bearing
| MR137 Deep groove ball bearing | |||
|---|---|---|---|
| Part Number | MR137 | Ball Number | 12 |
| d | 7 | Ball Size | 2.381 |
| D1 | 13 | Dynamic Load Co(N) | 5950 |
| B | 3 | Static Load Cor(N) | 2760 |
| R | 0.2 | Grease Speed | 40000 |
| Weight(Kg) | 0.00202 | Oil Speed | 48000 |
MR137 Miniature Deep Groove Ball Bearing | Open, ZZ, 2RS High Precision Bearings
The MR137 deep groove ball bearing is a high-precision miniature bearing designed for ultra-compact, space-constrained micro mechanical systems that demand stable high-speed rotation, low vibration and long operational lifespan. Featuring precision miniaturized dimensions, finely polished raceways and premium rolling elements, this single-row micro bearing delivers ultra-low friction, consistent dimensional accuracy and reliable rotational stability. Optimized for light-load, high-frequency cyclic operation, the MR137 maintains sturdy structural rigidity and excellent wear resistance, perfectly matching modern miniaturized precision electromechanical devices. This series provides three standard industrial configurations: open type, MR137ZZ double metal shield type and MR137-2RS double rubber sealed type. Supported by five industrial-grade materials, it adapts perfectly to economical, sanitary, high-wear and corrosive working environments for diverse micro-precision industrial applications.
MR137 Open / ZZ / 2RS Structural Features
MR137 Open Type: The unsealed open structure ensures unobstructed air circulation and efficient heat dissipation, effectively preventing thermal accumulation during prolonged high-speed micro operation. It supports convenient grease replenishment and simple routine maintenance without extra rotational resistance. Ideal for clean, dry indoor workshops and fully enclosed micro precision machinery, it retains ultra-high running accuracy and stable long-cycle performance for lightweight micro mechanical assemblies.
MR137ZZ Double Metal Shields: Equipped with dual non-contact steel shields, the MR137ZZ 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 negligible friction loss. Featuring reliable durability and outstanding cost performance, it is widely used in dry working conditions for micro high-speed motors, drone precision components, optical instruments and miniature transmission systems.
MR137-2RS Double Rubber Seals: The fully sealed MR137-2RS variant adopts double-sided contact rubber seals to comprehensively isolate moisture, water splashes, oil mist and corrosive fine dust. It tightly 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 scenarios for portable micro precision devices and outdoor miniature electromechanical equipment.
MR137 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 conventional micro precision machinery, ideal for mass batch 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, perfectly suitable 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, 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 superior 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 MR137 deep groove ball bearing features an ultra-compact miniature structure, lightweight design, ultra-low noise and durable high-speed precision. Three universal sealing solutions and five diversified 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 core parts, optical precision instruments, micro transmission components, portable micro power tools and compact medical devices. As a critical ultra-small rotary component for space-limited micro mechanical systems, the MR137 bearing provides high-efficiency, low-maintenance and ultra-precise rotation solutions for modern miniaturized industrial and commercial precision equipment.
