1. Core Performance and Formulation

1. Formulation

• Base Oil: Synthetic oil (ester or hydrocarbon-based) for stability across -54°C to 177°C.

• Thickener: Organically modified bentonite (non-soap), optimized for colloidal structure and high-temperature resistance.

• Additives: Heavy metal-free (lead, cadmium), nitrite-free, with eco-friendly extreme pressure (EP) anti-wear agents and antioxidants.

2. Key Properties

• Wide-Temperature Adaptability: Maintains low startup torque (0N·m at -54°C) and minimal evaporation (≤0.53% at 177°C, per SH/T 0337), meeting extreme environmental demands.

• EP and Anti-Wear Performance: Hertz load reaches 400ZMZ/N (SH/T 0202), suitable for high-impact scenarios like aircraft brake systems and wheel bearings.

• Stability:

• Colloidal Stability: Steel mesh oil separation ≤6.45% (SH/T 0324), no softening risk at high temperatures.

• Water Resistance: Water washout loss ≤4.88% (ASTM D1264), withstands salt spray and humidity.

• Compatibility: Excellent with rubber and plastic components, ideal for sealed bearings and complex transmission systems.

2. Application Scenarios

1. Aviation Sector

• Aircraft Brake Systems: Wheel bearings and gearbox bearings (validated for 150 landings on Boeing 707).

• Helicopter Transmission: Tail rotor shaft bearings and swashplate ball bearings (meets flight test standards).

• Import Substitution: Replaces imported products like Mobilgrease 28 and AeroShell Grease 5, achieving localization.

2. Industrial and Civilian Sectors

• Marine Auxiliary Machinery: High-load gears and sliding bearings (naval vessel control systems).

• Automotive Components: Low-power device lubrication (e.g., Santana models, compliant with GJB 9001A-2001).

• High-Temperature Industrial Equipment: Rolling bearings in petrochemical machinery (replaces Klüber and Shell products).

3. Technical Specifications and Test Data

4. Comparative Analysis with Similar Products

1. 7256 vs. Mobilgrease 28

• Temperature Range: Both cover -54°C–177°C, but Mobilgrease 28 offers better low-temperature pumpability (PAO base oil).

• Eco-Friendliness: 7256 excludes paraffin and organometallic clays, aligning better with modern environmental standards.

2. 7256 vs. AeroShell Grease 5

• Low-Temperature Performance: AeroShell Grease 5 operates down to -23°C, while 7256 extends to -54°C.

• Cost: 7256 is 30%-50% cheaper than imported alternatives with more stable supply chains.

3. 7256 vs. Domestic 7254/7014 Series

• Load Capacity: 7254 (with MoS₂) offers superior EP performance (680N Hertz load) but weaker low-temperature adaptability.

• High-Temperature Limits: 7014 withstands up to 200°C but sacrifices low-temperature startup performance.

5. Production and Supply Chain

1. Manufacturer and Standards

• Primary Manufacturer: Sinopec Research Institute of Petroleum Processing (RIPP), compliant with GJB 9001A-2001.

• International Certifications: Meets MIL-PRF-81322 (U.S. military) and NATO CODE G-395.

2. Supply and Market

• Packaging: 3 kg/canister (industrial), 4 kg/canister (aviation), minimum order: 1 canister.

• Authorized Distributors: Sold exclusively through Sinopec-affiliated channels (e.g., Beijing Luhang Aviation) to prevent counterfeits.

6. Usage and Maintenance Guidelines

1. Operational Requirements

• Cleaning: Clean components with solvent and dry thoroughly before lubrication to remove old grease.

• Compatibility Testing: 72-hour testing required for contact with polyurethane seals.

2. Maintenance Recommendations

• Relubrication Intervals: Inspect and replenish every 500 hours in high-temperature or heavy-load environments.

• Storage: Store sealed in dark, dry conditions below 25°C; use nitrogen purge after opening to prevent oxidation.

 Summary and Industry Impact

RIPP 7256  Aviation Grease, with its extreme temperature range (-54°C–177°C), eco-friendly formula, and import substitution capability, has become a benchmark for domestic aviation lubrication. Its successful deployment in Boeing  aircraft and helicopter transmission systems marks China’s breakthrough in high-end lubrication technology. Future upgrades will further drive localization, reducing reliance on global brands like Mobil and Shell.