6708 Deep Groove Ball Bearings
| 6708 Deep Groove Ball Bearings | |||
|---|---|---|---|
| Part Number | 6708 | Ball Number | 22 |
| d | 40 | Ball Size | 2.381 |
| D1 | 50 | Dynamic Load Co(N) | 2720 |
| B | 6 | Static Load Cor(N) | 2340 |
| R | 0.3 | Grease Speed | 14000 |
| Weight(Kg) | 0.0225 | Oil Speed | 17000 |
6708 Deep Groove Ball Bearing | Open, ZZ, 2RS Thin-Wall Precision Bearings
The 6708 deep groove ball bearing is a high-load thin-wall precision model in the 6700 series, featuring optimized enlarged rolling elements and reinforced raceway structure for upgraded load capacity and structural rigidity compared to smaller thin-wall bearings. This single-row deep groove ball bearing adopts an ultra-slim lightweight design, perfectly solving space installation limitations of compact precision mechanical systems. It delivers stable low-friction rotation, excellent dimensional consistency and superior anti-fatigue performance, supporting long-term low-noise, high-speed operation under medium cyclic loads. The 6708 series offers three standard industrial configurations: open type, 6708ZZ double metal shield type and 6708-2RS double rubber sealed type. Five industrial-grade material options fully adapt to economical, sanitary, wear-resistant and corrosive working environments for diversified precision industrial scenarios.
6708 Open / ZZ / 2RS Structural Features
6708 Open Type: The unsealed open structure enables unobstructed air circulation and efficient heat dissipation, effectively eliminating thermal accumulation during continuous high-speed operation. It supports convenient grease replacement and daily routine maintenance without generating extra rotational resistance. Ideal for clean, dry indoor workshops and fully enclosed slim precision machinery, it maintains stable running accuracy and consistent performance during long-cycle medium-load operation.
6708ZZ Double Metal Shields: Equipped with dual-sided non-contact steel shields, this professional dust-proof precision bearing effectively blocks fine dry dust, floating micro particles and workshop debris. The non-contact design retains original high-speed precision and rotational smoothness with minimal friction loss. Featuring reliable durability and outstanding cost performance, 6708ZZ bearings are widely applied in dry precision automation systems, slim high-power drive motors, precision electronic devices and compact transmission equipment.
6708-2RS 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 outdoor working conditions for compact high-precision electromechanical equipment.
6708 Bearing Material Performance
Carbon Steel: Cost-effective standard industrial material with uniform hardness and stable anti-fatigue properties. It provides reliable wear resistance and smooth high-speed rotation for conventional precision equipment, delivering 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 daily 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 industrial and electronic slim precision equipment.
Core Advantages And Industrial Applications
The 6708 deep groove ball bearing features ultra-thin space-saving structure, lightweight design, enhanced 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 slim high-power precision motors, miniature testing instruments, consumer electronics, smart device components, small household appliances, miniature medical devices, automated precision accessories and food processing micro machinery, providing compact, low-maintenance and high-efficiency precision rotation solutions for modern space-limited medium-load precision mechanical systems.
