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Pingxiang County, Xingtai City, Hebei Province, China
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Quickly match SKF seals with National Oil Seal cross-reference charts (e.g., 470380 473231，473237，352541，473232). Engineered with NBR/FKM for extreme heat, oil, and wear resistance. Reduce costs and downtime—seamless SKF compatibility ensures leak-free pumps, gearboxes, and motors. Globally stocked. Find your SKF equivalent now and order today!
National Oil Seals: Premium Seals + Cross-Reference to SKF Find exact SKF matches instantly with the National Oil Seal cross reference chart PDF (e.g., 415645，455104，472636，416271)，. Browse our National Oil Seal catalog for NBR/FKM seals that resist heat, oil, and wear. Simplify replacements—global stock, leak-proof performance. Download the National Oil Seal cross reference guide now and order today!
National Oil Seals: Simplify replacements with National Oil Seal cross reference online tools—instantly match SKF or other brands by part number (e.g., 471442，472705，471737，471466). Use the National Oil Seal lookup platform to verify specifications like NBR/FKM materials for heat, oil, and abrasion resistance. Popular sizes ensure fit-for-purpose solutions in pumps, gearboxes, and motors. Streamline sourcing with downloadable National Oil Seal cross reference by part number charts. Durable, leak-proof designs cut downtime. Find your match and order today!
National Oil Seals: Find the perfect seal with National Oil Seals by size or National Oil Seals by dimension—offering precision fits for 107.9*76.2 *11， 107.9*79.38 *12.7， 107.9*85.73 *12.7， 111.1*82.55 *12.7 111.1*88.9 *12.7， 111.1*92.08*9.53， , and other popular industrial sizes. Quickly match SKF equivalents using the National Oil Seal cross reference to SKF PDF, ensuring hassle-free replacements. The National Oil Seal size chart simplifies selection, while the National Oil Seal catalog PDF delivers instant access to specs, diagrams, and technical data. Built for extreme conditions, our seals prevent leaks, reduce wear, and extend equipment life.
National Oil Seal: Seamless Compatibility & Precision Find the right seal fast with the National Oil Seal catalog by size—featuring popular dimensions like 60.33 x 38.1 x 0.312， 60.325*41.275*7.9， 60.33*44.45*7.93， 61.89*44.45*7.92， 63.55*38.1*7.92， . Simplify replacements using the National Oil Seal interchange guide and National Oil Seals cross reference for SKF, Timken, and more. The National Oil Seal catalogue PDF offers instant access to specs, National Oil Seal dimensions, and diagrams. Whether standard or custom, our seals ensure leak-free performance, reduced downtime, and extended equipment life. Explore the comprehensive National Oil Seals catalog for industrial-grade solutions tailored to your needs. Download now and upgrade efficiency—expert sealing is just a click away!
National Oil Seal: National Oil Seal Company offers high-performance solutions such as the National Oil Seal 3604, National Oil Seal 37003a, National Oil Seal 8835s and National Oil Seal 6815 that are designed to last for automotive, industrial and heavy-duty applications. Available through certified National Oil Seal dealers, these seals prevent leaks, reduce wear and extend the life of your equipment. Whether replacing or upgrading, our products ensure a precise fit and reliable performance. As with National Oil Seal Company
National Oil Seal ：national oil seal cross reference to skf National Oil Seals offer precision sealing for hydraulic, automotive, and industrial systems. Key models like 63.5×44.45×12.7mm (high-pressure) and 63.5×50.8×6.35mm (352541, SKF-compatible) ensure seamless replacements. Features: SKF Cross-Reference: Direct match (e.g., National 471424 ≈ SKF 60x80x8). Extreme Durability: Fluorocarbon seals (482041N) handle -40°C to 200°C. Zero Leaks: ±0.01mm precision (e.g., 63.55×44.45×7.92mm). Popular sizes: 60.33×38.1×0.312mm (470380), 66.68×50.8×7.92mm (471424). Upgrade reliability – order National Oil Seal today!
National oil bath seals，national oil seal company china feiyun national oil seal 3604， national oil seal 37003a， national oil seal 8835s 70.05*47.62*10.79 6712N 73.02*44.45*9.52 471141 73.02*53.97*9.52 470898 73.02*50.8*7.92 472924 76.2*57.15*9.52 471272 76.2*57.15*11.11 471341 76.2*60.33*9.53 473573 76.2*50.8*7.92 472397
Research and Innovation
Practical material improvement technology
Targeting the needs of small and medium-sized enterprises, we focus on optimizing cost-effective rubber composite materials, and by adjusting the formula ratio, we enhance the oil resistance, wear resistance and adaptability of oil seals (-30℃ to 200℃), reducing costs by 15% while increasing product life by 20%. The technology has passed third-party testing and certification and is widely used in agricultural machinery, industrial pumps and valves and other livelihood fields, meeting the dual requirements of small and medium-sized customers for quality and cost.
Modular sealing structure design
Combined with market feedback, we developed standardized multi-scenario sealing components, which adopt replaceable lip design and simple installation structure to meet the diverse needs of general machinery and equipment. By simplifying the production process, the product delivery cycle is shortened by 30%, supporting small batch customized orders, helping customers reduce inventory pressure, and serving more than 100 regional small and medium-sized machinery manufacturers.
Lean production and environmental protection upgrade
Introducing semi-automatic production lines to achieve precise control of key processes (such as spring preload and lip forming), the product qualification rate is stable at more than 98.5%. Simultaneously improve environmental protection technology, adopt low VOC water-based coating technology, meet domestic environmental protection standards, and pass ISO 9001 quality management system certification, becoming a stable partner of many regional auto parts suppliers
Feiyun Seals Factory focuses on the research, development, and production of high-quality oil seals, offering a full range of multi-specification, high-performance oil seal products to meet sealing needs in industrial equipment, automotive, construction machinery, and more. Below is a selection from the National Oil Seal Model Catalog with complete specifications and reliable quality. For inquiries and purchases, please contact us!
Core Product Advantages
Precision Craftsmanship: Utilizes composite technology of wear-resistant rubber and a metal skeleton for high-temperature resistance, anti-aging, and a 30% extended service life.
Wide Compatibility: Covers outer diameters from 25.4 mm to 203.2 mm, suitable for various shaft sizes and operating conditions.
Rigorous Quality Control: 100% airtight testing, compliant with ISO 9001 standards, ensuring zero leakage.
Rapid Response: Standard models are in stock with customized production cycles reduced to 7 days.
Model Specification Overview
Classified by Outer Diameter to Precisely Match Your Needs:
Outer Diameter 20–100 mm (Small Equipment/Precision Machinery)
| Model | Dimensions (OD × ID × Thickness, mm) | Product Code |
|---|---|---|
| 127 | 66.68 × 50.8 × 7.92 | 471424 |
| 128 | 66.68 × 41.28 × 7.95 | 473232 |
| 129 | 69.85 × 44.45 × 7.93 | 472179 |
| 130 | 69.85 × 47.63 × 7.93 | 472572 |
| 132 | 70.05 × 47.62 × 10.79 | 6712N |
Outer Diameter 100–170 mm (General Industry/Automotive Parts)
| Model | Dimensions (OD × ID × Thickness, mm) | Product Code |
|---|---|---|
| 133 | 73.02 × 44.45 × 9.52 | 471141 |
| 137 | 76.2 × 57.15 × 9.52 | 471272 |
| 141 | 82.55 × 63.5 × 9.53 | 471271 |
| 146 | 85.62 × 57.15 × 9.53 | 412920 |
Outer Diameter 170–203 mm (Heavy Machinery/Special Operating Conditions)
| Model | Dimensions (OD × ID × Thickness, mm) | Product Code |
|---|---|---|
| 145 | 190.5 × 165.1 × 14.28 | 415294 |
| 149 | 203.2 × 177.8 × 15.87 | 416364 |
| 150 | 203.2 × 165.1 × 15.9 | 416229 |
Note:
Models with an “N” designation (e.g., 6712N) are enhanced for oil resistance and high-pressure applications, making them ideal for hydraulic systems. Custom sizes are also supported—please consult our technical team for details.
Applications
Automotive: Seals for transmissions, crankshafts, and wheel hubs (Recommended Models: 137, 146).
Construction Machinery: Seals for hydraulic cylinders and pump valves (Recommended Models: 145, 150).
General Industry: Dust and leakage protection for fans and gearboxes (Recommended Models: 133, 141).
Why Choose Feiyun?
✅ One-Stop Procurement: Over 160 standard models available, eliminating the need for multiple suppliers.
✅ Technical Support: Free guidance on product selection and installation.
✅ Price Advantage: Direct factory supply, eliminating intermediaries and reducing costs by 20%.
Contact us now to enjoy exclusive offers!
Feiyun Seals | Your Premier Partner for National Oil Seals & Comprehensive Sealing Solutions
Dear Valued Partner,
I’m Locke Li from Feiyun Seals Factory, a leading ISO 9001:2015 certified manufacturer with 15+ years of expertise in precision sealing technology. While National Oil Seals are our flagship product, we also deliver a full spectrum of high-performance seals tailored to meet global industrial demands.
Core Focus: National Oil Seals – Precision Redefined
National Oil Seals are the backbone of our expertise, engineered to excel in extreme environments. Here’s why they dominate our portfolio:
✅ Unmatched Technical Superiority
Material Innovation:
Steel casing + NBR/FKM/PTFE composites for thermal stability (-40°C to +200°C).
Spring-loaded dual lips to prevent leakage under 3.5 MPa pressure.
Precision Engineering:
Laser-validated tolerances (±0.01mm) for perfect shaft alignment.
Customizable for ID 20mm–400mm with anti-rotation notches or dust lips.
✅ Industry-Proven Performance
| Application | Key Models | Results Achieved |
|---|---|---|
| Heavy-Duty Trucks | NO-127 (66.68×50.8×7.92) | 98% leakage reduction in axle systems |
| Mining Equipment | NO-145 (190.5×165.1×14.28) | 15,000-hour lifespan in abrasive environments |
| Industrial Pumps | NO-133 (73.02×44.45×9.52) | 99.5% uptime in high-speed (20m/s) rotary systems |
Beyond National Oil Seals: Diversified Sealing Solutions
To serve your broader needs, we offer 6 specialized product lines, each backed by rigorous quality control:
✅ Power Steering & Hydraulic Seals
Power Steering Oil Seals:
Material: HNBR with PTFE coating for 25 MPa pressure resistance.
Applications: ZF/TRW-compatible EPS systems, off-road vehicle pumps.
Hydraulic Seals:
Multi-lip U-cups and piston seals for cylinders (ISO 10766 certified).
✅ Automotive & Industrial Seals
Valve Stem Seals: Reduced hydrocarbon emissions with FKM-Viton® compounds.
TC Oil Seals: Cost-effective sealing for transmissions and gearboxes.
✅ High-Pressure & Custom Solutions
PTFE Seals: Zero-leakage performance in chemical processing.
Polyurethane Pads (GR/GS/MT): Shock-absorbing pads for CNC machinery.
Why Partner with Feiyun?
Dual Expertise:
National Oil Seals: 150+ standard sizes, 7-day customization.
Full Portfolio: From O-rings to hydraulic systems – one-stop solutions.
Quality Assurance:
100% material traceability (RFID-tagged batches).
72-hour endurance testing for critical applications.
Global Agility:
30% faster delivery than industry benchmarks.
EXW/FOB/DDP terms with multilingual technical support.
Success Stories
European Automotive Supplier:
Switched to Feiyun’s NO-137 (76.2×57.15×9.52) National Oil Seals, achieving zero recalls in 3 years.
Asian Hydraulic OEM:
Cut downtime by 40% using our Power Steering Seals + PTFE Hydraulic Kits.
Act Now – Optimize Your Sealing Systems!
📥 Request Free Samples: Test our National Oil Seals and related products.
📞 Contact: Locke Li | WhatsApp/WeChat: +86 187 3012 9525
1. Feiyun Seals After-Sales Service System
Quick Response Mechanism
24-hour online technical consultation and fault reporting, promise to issue a preliminary solution within 2 hours;
Emergency orders are prioritized, regular product delivery time is ≤5 days, and emergency repair parts support 48-hour expedited delivery.
Customized Technical Support
Provide full-process technical support such as seal selection, working condition adaptation, installation guidance, and customize material formulas for special media (such as acid, alkali, high-temperature oil);
Provide free sealing system optimization solutions, such as recommending double-lip TC oil seals for hydraulic equipment to take into account both dust prevention and sealing.
2. Typical Cases
Dough Mixer Industry: Dough Mixer Equipment Improvement
Problem: Oil seal wears and melts into flour due to long-term operation at high temperature.
Solution: Customized NBR-TG4 type external thread oil seal, using brown wear-resistant rubber.
Effect: Wear rate decreased by 95%.
Engineering Machinery Field: Repair of Hydraulic System of Heavy Industry Excavator
Problem: Aging of hydraulic cylinder seal leads to slow movement.
Service Process: Provide a full set of repair kits (including TG90-125-15 oil seal + guide ring) within 48 hours.
Results: Equipment recovery efficiency increased by 30%, and maintenance costs reduced by 40%..
Customized solution: Develop AS-type sealing ring made of hydrogenated nitrile rubber (HNBR), and pass ISO/TS 16949 certification.
Feedback: Stable supply for 3 consecutive years, with defect rate less than 0.2%.
3. Summary of service advantages
Feiyun Seals covers 20+ industries such as automobiles, energy, machinery, etc. through the three cores of rapid response, precise adaptation, and full-cycle management, and has served more than 1,500 customers in total.
We are providing good & on time services to our valuable customers.
Address: Pingxiang County, Xingtai, Hebei, China
Working Hrs:Mon to Fri: 8:30-18:00
ABOUT US
Feiyun Seals Factory, with more than 15 years of experience, specializes in the production of oil seals and O-rings. We can provide any oil seals and O-rings you need.
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