6908 Deep Groove Ball Bearings
| 6908 Deep Groove Ball Bearings | |||
|---|---|---|---|
| Part Number | 6908 | Ball Number | 13 |
| d | 40 | Ball Size | 6.747 |
| D1 | 62 | Dynamic Load Co(N) | 14900 |
| B | 12 | Static Load Cor(N) | 9700 |
| R | 0.6 | Grease Speed | 10000 |
| Weight(Kg) | 0.11 | Oil Speed | 12000 |
6908 Deep Groove Ball Bearing | Open, ZZ, 2RS Ultra-Thin Micro Bearings
The 6908 deep groove ball bearing is a high-performance ultra-thin micro precision component in the 6900 series, equipped with upgraded reinforced raceways and optimized rolling element distribution for enhanced structural rigidity and stable light-medium load capacity. Designed for ultra-compact and space-limited installation scenarios, this single-row thin-wall miniature bearing delivers ultra-low friction rotation, consistent dimensional accuracy and outstanding anti-fatigue performance. It supports long-term ultra-quiet, high-speed continuous cyclic operation, serving as a core rotary component for miniaturized electromechanical devices and compact precision electronic systems. The 6908 series includes three standard industrial configurations: open type, 6908ZZ double metal shield type and 6908-2RS double rubber sealed type, with five industrial-grade materials adapting to economical, sanitary, wear-resistant and corrosive complex industrial working environments.
6908 Open / ZZ / 2RS Structural Features
6908 Open Type: The unsealed open structure enables unobstructed air circulation and efficient heat dissipation, effectively eliminating thermal accumulation during prolonged high-speed micro operation. It supports tool-free grease replenishment and simple daily maintenance without generating extra rotational resistance. Ideal for clean, dry indoor workshops and fully enclosed micro-precision equipment, it maintains stable running accuracy and consistent performance during long-cycle light-medium load operation.
6908ZZ Double Metal Shields: Equipped with dual-sided non-contact steel shields, this premium dust-proof micro bearing effectively blocks fine dry dust, floating micro particles and tiny industrial debris. The non-contact protective design retains original high-speed precision and rotational smoothness with minimal friction loss. Featuring long-lasting durability and superior cost performance, 6908ZZ bearings are widely applied in dry miniature high-speed motors, precision consumer electronics, smart micro devices and compact micro-transmission systems.
6908-2RS Double Rubber Seals: This fully sealed variant adopts double-sided contact rubber seals to comprehensively isolate moisture, splash water, oil mist and corrosive fine dust. It tightly locks internal micro lubricating grease to prevent leakage, oxidation and aging, achieving long-term maintenance-free operation. It reliably adapts to humid, dusty and mildly harsh working conditions for portable, outdoor and industrial micro-precision electromechanical equipment.
6908 Bearing Material Performance
Carbon Steel: High cost-performance standard industrial material with uniform hardness and stable anti-fatigue properties. It delivers dependable wear resistance and smooth high-speed rotation for conventional micro-precision equipment, providing optimal cost efficiency for mass electronic products and small industrial batch applications.
304 Stainless Steel: Food-grade stainless steel with outstanding oxidation and rust resistance. It prevents micro corrosion and precision degradation in humid and open environments, ideal for miniature food processing equipment, sanitary micro-devices and daily precision gadgets.
316 Stainless Steel: Marine-grade corrosion-resistant material with strong tolerance to acid, alkali and salt spray. It withstands mild chemical erosion and coastal high humidity, suitable for marine micro-precision parts, sanitary instruments and chemical miniature equipment.
420 Stainless Steel: High-toughness martensitic stainless steel balancing moderate corrosion resistance and high surface hardness. It features stable wear and impact resistance, maintaining accurate micro dimensional stability during long-term continuous high-speed operation.
440 Stainless Steel: Ultra-high hardness stainless steel with top-tier abrasion resistance and structural stability. It sustains precise, stable operation under severe wear and corrosive environments, customized for high-end miniature ultra-thin precision industrial and electronic equipment.
Core Advantages And Industrial Applications
The 6908 deep groove ball bearing features an ultra-compact micro-size structure, lightweight ultra-thin design, ultra-low noise and durable high-speed precision performance. Three diversified sealing structures and five professional material grades fully cover economical, anti-rust, wear-resistant and anti-corrosion micro-precision application scenarios. It is extensively used in miniature precision motors, smart wearable devices, consumer electronics, small household appliances, micro medical devices, automated micro-components and light-duty sanitary machinery. This bearing delivers compact, low-maintenance and high-efficiency precision rotation solutions for modern micro-space limited miniaturized mechanical systems, meeting diverse commercial and industrial precision operation requirements.
