F6904 Flange Ball Bearings
| F6904 Flange Ball Bearings | |||
|---|---|---|---|
| Part Number | F6904 | Ball Number | 11 |
| d | 20 | Ball Size | 3.969 |
| R | 0.3 | Dynamic Load Co(N) | 4150 |
| D/D1 | 37/39.5 | Static Load Cor(N) | 2520 |
| B/C | 9/1 | Grease Speed | 19000 |
| Weight(Kg) | 0.0310 | Oil Speed | 22000 |
F6904 Flange Deep Groove Bearing | Open, ZZ, 2RS High Precision Thin Section Bearing
The F6904 flange deep groove ball bearing is a high-performance ultra-thin thin-section bearing designed for space-constrained miniature mechanical systems requiring lightweight installation, precise positioning and stable long-term high-speed operation. Adopting an integrated one-piece flange and high-precision polished deep groove raceway structure, this bearing offers improved radial load capacity, ultra-low vibration and outstanding dimensional stability during continuous cyclic work. The integral flange eliminates extra positioning fasteners, simplifies assembly procedures and effectively prevents shaft offset and axial play in compact precision equipment layouts. Available in three mainstream industrial types including F6904 open type, F6904ZZ double metal shield type and F6904-2RS double rubber sealed type, it stably adapts to dry, dusty, humid and mildly corrosive working environments. Manufactured from carbon steel, 304 stainless steel, 316 stainless steel, 420 stainless steel and 440 stainless steel, the F6904 covers full demands for economical, sanitary, wear-resistant and anti-corrosion precision industrial applications.
F6904 Open / ZZ / 2RS Structural Features
F6904 Open Type: The unsealed open structure features unobstructed air circulation and efficient heat dissipation, avoiding thermal accumulation and precision degradation during prolonged high-speed operation. It supports convenient grease refilling and tool-free routine maintenance without increasing rotational resistance. Ideal for clean, dry indoor workshops and fully enclosed precision micro machinery, it maintains consistent running accuracy and long-term operational stability.
F6904ZZ Double Metal Shields: Equipped with dual non-contact steel shields, the F6904ZZ effectively blocks fine dry dust, floating particles and micro industrial debris. The non-contact protective design preserves original high-speed smoothness and micro precision with minimal friction loss. With reliable durability and excellent cost performance, this model is widely used in dry industrial environments and long-running high-speed precision automation equipment.
F6904-2RS Double Rubber Seals: The fully sealed 2RS structure 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, enabling long-term maintenance-free operation for humid, dusty and complex indoor and outdoor working scenarios.
F6904 Bearing Material Performance
Carbon Steel: High cost-performance industrial base material with uniform hardness and stable anti-fatigue performance. Carbon steel F6904 bearings deliver reliable wear resistance and smooth high-speed rotation, ideal for mass production and budget-sensitive precision automation projects.
304 Stainless Steel: Food-grade rust-proof stainless steel with excellent oxidation resistance. It resists mild humid corrosion, suitable for food processing equipment, medical devices and sanitary-grade precision mechanical systems.
316 Stainless Steel: Marine-grade anti-corrosion material with strong tolerance to salt spray, acid and alkali erosion. It maintains stable precision in coastal high-humidity and light chemical environments for marine instruments and miniature chemical equipment.
420 Stainless Steel: High-toughness martensitic stainless steel balancing moderate corrosion resistance and high surface hardness. It provides stable wear resistance and dimensional stability during continuous high-speed cyclic operation.
440 Stainless Steel: Ultra-high hardness stainless steel with superior abrasion resistance. It withstands heavy friction and weak corrosion, ensuring long-term accurate rotation for high-end micro precision mechanical systems.
Core Advantages And Industrial Applications
The F6904 ultra-thin flange bearing features a lightweight slim structure, reinforced load capacity, integrated flange positioning, ultra-quiet operation and durable high-speed precision. Multiple sealing grades and diversified material options fully meet industrial requirements for cost efficiency, sanitation, wear resistance and corrosion protection. Widely applied in slim miniature high-speed motors, micro drone precision components, compact robotic micro joints, portable optical instruments, micro transmission systems, mini precision power tools and compact medical automation devices, the F6904 acts as a core rotary and positioning part for ultra-space-limited micro mechanical structures. It provides high-efficiency, low-noise and low-maintenance precision rotation solutions for modern miniaturized industrial, commercial and sanitary precision automation equipment.
