6818 Deep Groove Ball Bearings
| 6818 Deep Groove Ball Bearings | |||
|---|---|---|---|
| Part Number | 6818 | Ball Number | 28 |
| d | 90 | Ball Size | 4.762 |
| D1 | 115 | Dynamic Load Co(N) | 14800 |
| B | 13 | Static Load Cor(N) | 14700 |
| R | 0.6 | Grease Speed | 7200 |
| Weight(Kg) | 0.210 | Oil Speed | 8600 |
6818 Deep Groove Ball Bearing | Open, ZZ, 2RS Ultra-Thin Precision Bearings
The 6818 deep groove ball bearing is a large-bore ultra-thin heavy-duty precision bearing in the 6800 series, designed with reinforced thickened raceways and upgraded rolling elements to deliver superior structural rigidity and enhanced heavy-load capacity. Keeping the series’ ultra-slim, space-saving lightweight profile, this single-row thin-wall bearing solves tight installation space limitations for large compact precision machinery without compromising running stability. It offers low-friction operation, excellent anti-fatigue performance and repeatable dimensional accuracy, supporting long-term ultra-quiet, high-speed cyclic operation under continuous heavy loads. Available in three mainstream industrial versions, open type, 6818ZZ double metal shield type and 6818-2RS double rubber sealed type, this bearing features five industrial-grade materials to fit economic, sanitary, high-wear and corrosive working conditions.
6818 Open / ZZ / 2RS Structural Features
6818 Open Type: The unsealed open design enables unobstructed airflow and fast heat dissipation, effectively avoiding heat accumulation during extended high-speed operation. It allows easy grease refilling and straightforward routine maintenance with zero extra rotational resistance. Ideal for clean, dry indoor environments and fully enclosed slim precision machinery, it maintains stable accuracy and consistent performance during long-cycle heavy-load operation.
6818ZZ 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 structure preserves original high-speed precision and rotational smoothness with minimal friction loss. Offering long service life and excellent cost performance, 6818ZZ bearings are widely used in dry industrial automation systems, large slim high-power motors, precision electronics and compact heavy-duty transmission equipment.
6818-2RS Double Rubber Seals: This fully sealed model adopts double-sided contact rubber seals to isolate moisture, splash water, oil mist and corrosive fine particles. It securely retains internal lubrication grease to prevent leakage, oxidation and aging, enabling long-term maintenance-free operation. It reliably adapts to humid, dusty and moderately harsh workshop and outdoor environments for large compact high-precision electromechanical devices.
6818 Bearing Material Performance
Carbon Steel: Cost-effective standard industrial material with uniform hardness and stable fatigue resistance. It delivers dependable wear resistance and smooth high-speed rotation for general heavy-load precision equipment, ensuring optimal cost efficiency for mass industrial and electronic applications.
304 Stainless Steel: Food-grade stainless steel with outstanding oxidation and rust resistance. It resists surface corrosion and precision degradation in humid and open environments, suitable for food processing machinery, sanitary equipment and daily-use slim precision devices.
316 Stainless Steel: Marine-grade corrosion-resistant material with excellent tolerance to acid, alkali and salt spray. It withstands chemical corrosion and coastal high humidity, perfect for marine precision components, sanitary processing machines and chemical precision instruments.
420 Stainless Steel: High-toughness martensitic stainless steel balancing moderate corrosion resistance and high surface hardness. It provides stable wear and impact resistance, maintaining precise dimensional stability during long-term continuous operation.
440 Stainless Steel: Ultra-high hardness stainless steel with superior abrasion resistance and structural stability. It sustains accurate and stable operation under severe wear and corrosive conditions, ideal for high-end ultra-thin precision industrial equipment.
Core Advantages And Industrial Applications
The 6818 deep groove ball bearing combines an ultra-thin space-saving structure, lightweight design, strong heavy-load capacity, ultra-low noise and durable high-speed precision. Three sealing types and five material grades fully cover economic, anti-rust, wear-resistant and anti-corrosion application needs. It is widely applied in large slim precision motors, industrial automation transmission systems, smart mechanical parts, high-end consumer electronics, miniature medical devices and food processing machinery, providing compact, low-maintenance and high-efficiency rotary solutions for space-limited heavy-duty precision mechanical systems.
