FR4-7Flange Ball Bearings
| FR4-7Flange Ball Bearings | |||
|---|---|---|---|
| Part Number | FR4-7 | Ball Number | 7 |
| d | 6.35 | Ball Size | 1.984 |
| R | 0.3 | Dynamic Load Co(N) | 980 |
| D/D1 | 11.1125/12.7 | Static Load Cor(N) | 420 |
| B/C | 3.967/0.787 | Grease Speed | 44000 |
| Weight(Kg) | 0.0010 | Oil Speed | 52000 |
FR4-7 Flange Deep Groove Bearing | Open, ZZ, 2RS High Precision Micro Bearing
The FR4-7 flange deep groove ball bearing is a high-precision micro flange bearing designed for ultra-compact, space-restricted miniature mechanical systems requiring accurate fixed positioning, stable rotary performance and long-term continuous high-speed operation. Featuring an integrally formed one-piece flange and ultra-fine polished deep groove raceways, this micro bearing delivers outstanding dimensional stability, ultra-low vibration and consistent rotary smoothness during repeated cyclic operation. The integrated flange structure eliminates extra positioning fasteners, simplifies rapid precision assembly, and effectively prevents shaft offset and axial play in densely arranged micro equipment layouts. Available in three standard industrial variants: FR4-7 open type, FR4-7ZZ double metal shield type and FR4-7-2RS double rubber sealed type, it reliably adapts to dry, dusty, humid and mildly corrosive indoor and outdoor working environments. Offered in carbon steel, 304 stainless steel, 316 stainless steel, 420 stainless steel and 440 stainless steel, the FR4-7 fully meets economical, sanitary, high-wear and anti-corrosion micro precision industrial application requirements.
FR4-7 Open / ZZ / 2RS Structural Features
FR4-7 Open Type: The unsealed open structure enables unobstructed air circulation and efficient heat dissipation, avoiding thermal accumulation and precision degradation during prolonged high-speed micro operation. It supports convenient grease refilling and tool-free routine maintenance without increasing rotational resistance. Ideal for clean, dry indoor workshops and fully enclosed miniature precision machinery, it maintains stable running accuracy and long-term operational consistency.
FR4-7ZZ Double Metal Shields: Equipped with dual non-contact steel shields, the FR4-7ZZ effectively blocks fine dry dust, floating particles and micro industrial debris. The non-contact protective design retains original high-speed smoothness and micro precision with minimal friction loss. Featuring reliable structural durability and outstanding cost performance, this model is widely applied in dry industrial workshops and long-running miniature precision automation equipment.
FR4-7-2RS Double Rubber Seals: The fully sealed 2RS structure adopts double-sided contact rubber seals to comprehensively isolate moisture, water splashes, 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 micro mechanical working scenarios.
FR4-7 Bearing Material Performance
Carbon Steel: High cost-performance industrial base material with uniform hardness and stable anti-fatigue properties. Carbon steel FR4-7 bearings deliver reliable wear resistance and smooth high-speed rotation, ideal for mass production and budget-sensitive miniature precision automation projects.
304 Stainless Steel: Food-grade rust-resistant stainless steel with excellent oxidation resistance. It resists micro corrosion in humid and open environments, suitable for miniature food processing accessories, compact medical devices and sanitary-grade micro precision mechanical systems.
316 Stainless Steel: Marine-grade anti-corrosion material with strong tolerance to salt spray, acid and alkali erosion. It maintains stable structural precision in coastal high-humidity and light chemical environments for micro marine instruments and miniature chemical equipment.
420 Stainless Steel: High-toughness martensitic stainless steel balancing moderate corrosion resistance and high surface hardness. It delivers stable wear resistance and precise dimensional stability during continuous high-speed cyclic operation.
440 Stainless Steel: Ultra-high hardness stainless steel with top-tier abrasion resistance. It withstands severe friction wear and weak corrosive conditions, ensuring long-term accurate and stable rotation for high-end micro precision mechanical systems.
Core Advantages And Industrial Applications
The FR4-7 ultra-compact micro flange bearing features a lightweight mini structure, accurate flange positioning, ultra-quiet operation and durable high-speed precision. Multiple sealing grades and diversified material options fully cover industrial demands for cost efficiency, sanitation, wear resistance and corrosion protection. Widely applied in ultra-miniature high-speed motors, micro drone precision components, slim robotic micro joints, portable optical micro instruments, miniature transmission systems, tiny precision power tools and compact micro medical devices, the FR4-7 serves as a core rotary and positioning component 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.
