6808 Deep Groove Ball Bearings
| 6808 Deep Groove Ball Bearings | |||
|---|---|---|---|
| Part Number | 6808 | Ball Number | 20 |
| d | 40 | Ball Size | 3.175 |
| D1 | 52 | Dynamic Load Co(N) | 5680 |
| B | 7 | Static Load Cor(N) | 4420 |
| R | 0.3 | Grease Speed | 14000 |
| Weight(Kg) | 0.032 | Oil Speed | 17000 |
6808 Deep Groove Ball Bearing | Open, ZZ, 2RS Ultra-Thin Precision Bearings
The 6808 deep groove ball bearing is a high-rigidity ultra-thin precision bearing in the 6800 series, featuring thickened raceway structures and upgraded rolling elements to deliver improved structural strength and enhanced medium-load capacity. Optimized for space-constrained miniaturized machinery, this single-row thin-wall bearing retains the series’ signature slim lightweight profile while offering better load endurance and anti-fatigue performance than smaller ultra-thin models. It supports stable low-friction, ultra-quiet and long-term high-speed operation under continuous light and medium cyclic loads, widely adopted in compact precision electromechanical and automated systems. The 6808 series provides three standard industrial sealing configurations: open type, 6808ZZ double metal shield type and 6808-2RS double rubber sealed type, with five industrial-grade material options to suit economical, sanitary, wear-resistant and corrosive working environments.
6808 Open / ZZ / 2RS Structural Features
6808 Open Type: The unsealed open structure enables unobstructed air circulation and efficient heat dissipation, effectively preventing thermal accumulation during prolonged high-speed operation. It allows quick grease replacement and hassle-free routine maintenance without generating extra rotational resistance. Ideal for clean, dry indoor workshops and fully enclosed slim precision equipment, it maintains stable running accuracy and consistent performance during long-cycle light and medium-load operation.
6808ZZ Double Metal Shields: Equipped with dual-sided non-contact steel shields, this dust-proof precision bearing effectively blocks fine dry dust, floating micro particles and workshop debris. The non-contact design preserves original high-speed precision and rotational smoothness with minimal friction loss. Featuring reliable long-term durability and outstanding cost performance, 6808ZZ bearings are widely applied in dry precision automation systems, miniature high-speed drive motors, precision consumer electronics and compact transmission machinery.
6808-2RS 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 lubricating grease to prevent leakage, oxidation and aging, realizing long-term maintenance-free operation. It perfectly adapts to humid, dusty and mildly harsh workshop and outdoor conditions for portable and industrial compact precision electromechanical devices.
6808 Bearing Material Performance
Carbon Steel: High cost-performance standard industrial material with uniform hardness and stable anti-fatigue properties. It delivers reliable wear resistance and smooth high-speed rotation for conventional precision equipment, providing optimal cost efficiency for mass electronic products and general industrial batch applications.
304 Stainless Steel: Food-grade stainless steel with superior oxidation and rust resistance. It prevents surface corrosion and precision degradation in humid and open environments, suitable for food processing micro equipment, sanitary machinery and slim precision devices.
316 Stainless Steel: Premium marine-grade corrosion-resistant material with strong tolerance to acid, alkali and salt spray. It withstands mild chemical erosion and coastal high humidity, ideal for marine precision accessories, sanitary processing equipment and chemical precision instruments.
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 dimensional stability during long-term continuous precision 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 complex corrosive environments, customized for high-end ultra-thin precision industrial and electronic equipment.
Core Advantages And Industrial Applications
The 6808 deep groove ball bearing features an ultra-thin space-saving structure, lightweight design, upgraded medium-load capacity, 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 precision application scenarios. It is extensively used in miniature precision motors, smart wearable devices, consumer electronics, small household appliances, miniature medical devices, automated precision accessories and light-duty food processing machinery, providing compact, low-maintenance and high-efficiency precision rotation solutions for modern miniaturized space-limited mechanical systems.
