R8 Deep groove ball bearing
| R8 Deep groove ball bearing | |||
|---|---|---|---|
| Part Number | R8 | Ball Number | 8 |
| d | 12.7 | Ball Size | 4.762 |
| D1 | 28.575 | Dynamic Load Co(N) | 5110 |
| B | 6.35 | Static Load Cor(N) | 2390 |
| R | 0.4 | Grease Speed | 27000 |
| Weight(Kg) | 0.0169 | Oil Speed | 32000 |
R8 Miniature Deep Groove Ball Bearing | Open, ZZ, 2RS High Precision Bearings
The R8 deep groove ball bearing is a high-precision imperial miniature bearing developed for compact, space-limited micro mechanical systems that require stable high-speed rotation, low noise and extended service life. Adopting standard imperial dimensions, ultra-fine polished raceways and precision rolling elements, this single-row micro bearing delivers ultra-low friction, minimal vibration and excellent dimensional stability. Optimized for light-load and high-frequency cyclic operation, the R8 bearing maintains rigid structural performance and reliable wear resistance, perfectly matching modern miniaturized precision electromechanical and automated equipment. Available in three standard industrial versions: open type, R8ZZ double metal shield type and R8-2RS double rubber sealed type, this imperial bearing supports five industrial-grade materials to adapt to economical, sanitary, high-wear and corrosive working conditions for diverse micro-precision industrial applications.
R8 Open / ZZ / 2RS Structural Features
R8 Open Type: The unsealed open structure ensures unobstructed air circulation and efficient heat dissipation, effectively avoiding thermal accumulation during long-duration high-speed micro operation. It allows convenient grease replenishment and simple routine maintenance without generating extra rotational resistance. Suitable for clean, dry indoor environments and fully enclosed micro precision machinery, it retains ultra-high running accuracy and stable long-cycle performance for lightweight micro mechanical assemblies.
R8ZZ Double Metal Shields: Equipped with dual non-contact steel shields, the R8ZZ 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 stable durability and outstanding cost performance, it is widely applied in dry working scenarios for micro high-speed motors, drone precision components, optical instruments and miniature transmission systems.
R8-2RS Double Rubber Seals: The fully sealed R8-2RS variant adopts double-sided contact rubber seals to comprehensively isolate moisture, water splashes, oil mist and corrosive fine dust. It tightly locks internal micro lubricating grease 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 precision devices and outdoor miniature electromechanical equipment.
R8 Bearing Material Performance
Carbon Steel: High cost-performance industrial base material with uniform hardness and stable anti-fatigue properties. It provides 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 anti-rust and anti-oxidation performance. 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 resistance to acid, alkali and salt spray erosion. It withstands coastal high humidity and mild chemical corrosion, 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 top-tier abrasion resistance and structural stability. It sustains accurate and stable micro operation under severe wear and corrosive conditions, customized for high-end micro precision mechanical systems.
Core Advantages And Industrial Applications
The R8 imperial miniature bearing features a compact lightweight structure, ultra-low vibration 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 components, optical precision instruments, micro transmission parts, portable micro power tools and compact medical devices. As a critical ultra-small imperial rotary component for space-constrained micro mechanical systems, the R8 bearing delivers high-efficiency, low-maintenance and ultra-precise rotation solutions for modern miniaturized industrial and commercial precision equipment.
