6718 Deep Groove Ball Bearings
| 6718 Deep Groove Ball Bearings | |||
|---|---|---|---|
| Part Number | 6718 | Ball Number | 38 |
| d | 90 | Ball Size | 3.969 |
| D1 | 120 | Dynamic Load Co(N) | 6650 |
| B | 10 | Static Load Cor(N) | 6900 |
| R | 0.3 | Grease Speed | 7800 |
| Weight(Kg) | 0.160 | Oil Speed | 9300 |
6718 Deep Groove Ball Bearing | Open, ZZ, 2RS Thin-Wall Precision Bearings
The 6718 deep groove ball bearing is a super-large bore heavy-duty thin-wall precision bearing in the 6700 series, equipped with thickened raceway structures and enlarged reinforced rolling elements to greatly enhance structural rigidity and heavy-load bearing capacity. Retaining the series’ classic ultra-slim lightweight design, this single-row bearing solves extreme space-limited installation demands for large compact precision machinery. It features excellent anti-fatigue performance, stable dimensional consistency and low-friction operation, supporting long-term ultra-quiet, high-speed continuous rotation under heavy cyclic loads. The 6718 series provides three mainstream industrial sealing options: open type, 6718ZZ double metal shield type and 6718-2RS double rubber sealed type. Five industrial-grade material grades cover economical, sanitary, high-wear and corrosive working scenarios for diversified precision industrial applications.
6718 Open / ZZ / 2RS Structural Features
6718 Open Type: The unsealed open structure delivers unobstructed air circulation and efficient heat dissipation, effectively eliminating thermal accumulation during prolonged high-speed operation. It allows convenient grease replacement and daily routine maintenance without generating extra rotational resistance. Suitable for clean, dry indoor workshops and fully enclosed large slim precision equipment, it maintains stable running accuracy and consistent performance under long-cycle heavy-load working conditions.
6718ZZ Double Metal Shields: Featuring dual-sided non-contact steel shields, this professional dust-proof 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. With reliable long-term durability and outstanding cost performance, 6718ZZ bearings are widely applied in dry precision automation systems, large slim high-power motors, precision electronic systems and compact heavy-duty transmission machinery.
6718-2RS 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 environments for large compact high-precision electromechanical equipment.
6718 Bearing Material Performance
Carbon Steel: High cost-performance industrial standard material with uniform hardness and stable anti-fatigue properties. It provides reliable wear resistance and smooth high-speed rotation for heavy-load precision equipment, delivering optimal cost efficiency for mass industrial and electronic 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, ideal for food processing equipment, sanitary machinery and slim precision devices.
316 Stainless Steel: Premium marine-grade corrosion-resistant material with strong acid, alkali and salt spray tolerance. It withstands mild chemical erosion and coastal high humidity, perfect for marine precision parts, 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 slim precision equipment.
Core Advantages And Industrial Applications
The 6718 deep groove ball bearing integrates an ultra-thin space-saving structure, lightweight design, superior heavy-load capacity, ultra-low noise and durable high-speed stability. 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 large slim high-power precision motors, industrial automation transmission systems, precision testing instruments, smart device components, miniature medical devices and food processing machinery, providing compact, low-maintenance and high-efficiency precision rotation solutions for modern space-limited heavy-load precision mechanical systems.
