NS-4405-FG Gearbox Fluid Grease

NSN: 9150-01-212-1409

NS-4405-FG is a high-capacity, semi-fluid grease developed by Syn-Tech, designed for demanding, high-performance applications, particularly in the aerospace industry. It is formulated with a lithium complex thickener and a synthetic blend base fluid, fortified with extreme pressure (EP) and anti-wear additives. This combination provides exceptional shear and centrifugal stability, ensuring consistent lubrication even under high rotational speeds and heavy loads. NS-4405-FG does not contain solids or silicone, which is crucial for preventing residue buildup and ensuring compatibility with various system components. It offers a wide operating temperature range and excellent long service life.

Key Features for Aviation:

• Semi-Fluid Grease (NLGI Grade 000): Its semi-fluid consistency allows it to flow like an oil in some conditions but retains the sealing properties of a grease, preventing leakage from imperfect seals.
  
• Synthetic Blend Base Fluid: Provides excellent thermal stability, oxidation resistance, and performance across a wide temperature range.
  
• Lithium Complex Thickener: Ensures mechanical stability, high dropping point, and good water resistance.
  
• Extreme Pressure (EP) and Anti-Wear Properties: Protects against wear and scoring under high loads, shock loading, and extreme pressure conditions.
  
• Excellent Shear and Centrifugal Stability: Maintains its consistency and lubricating film even under high shear forces and rotational speeds, critical in rotating machinery.
  
• Non-Drying and Long Service Life: Designed to provide prolonged lubrication without drying out or breaking down, reducing maintenance intervals.
  
• Does Not Contain Solids or Silicone: Ensures clean operation and compatibility with sensitive components, avoiding potential contamination or interference with other materials.
  
• Wide Operating Temperature Range: Effective from very low temperatures, typically -65°F (-54°C), up to 275°F (135°C).
  
• Corrosion Preventive Properties: Offers protection against rust and corrosion.

Typical Aviation Applications:

• Helicopter Gearboxes: It is notably approved and used on Intermediate and Tail Rotor gearboxes on the AH-64 Apache helicopter gunship, highlighting its suitability for high-stress, high-centrifugal force environments.
  
• Couplings: Used in various mechanical couplings throughout the airframe where extreme pressure and stability are required.
  
• Bearings: Applied to light to medium load bearings that operate under demanding conditions, benefiting from its anti-wear and EP properties.
  
• Drives and Splines: Provides effective lubrication for drives and splines, ensuring smooth operation and reducing wear in high-load, high-speed applications.
  
• General High-Performance Applications: Applicable to other high-performance mechanical systems within aircraft that require a robust, stable, semi-fluid lubricant with excellent load-carrying capabilities.

• All in-stock orders are processed within 1–2 business days (excluding weekends and holidays) after receiving your order confirmation email.
• Orders with a lead time will ship according to the estimated shipping time shown on the product page.
• If we experience a high volume of orders or if an item is backordered, processing times may be slightly delayed. We will notify you promptly via email.

• Returns must be made within a maximum of 3 business days after receiving the product, with prior authorization from Aircraft Shop Supply (Return Material Authorization). Returns without prior notice or written authorization will not be accepted.
• For products with 3 to 6 months of remaining shelf life, claims must be made within the next 2 business days after receipt.
• Returns are not accepted for products with less than 3 months of remaining shelf life.
• Returns are not accepted for products purchased during a low Shelf Life promotion, items sold with discounts, or special orders that must be placed directly with the factory.
• The customer is responsible for the return shipping cost, except in cases where the return is due to an error on the part of Aircraft Shop Supply.
• Refunds will only be issued after the product has been inspected and no damage is found.
• A 25% Restocking Fee will be charged for returns of products in good condition that are either no longer needed or were ordered incorrectly.
• A 35% Restocking Fee will be charged for returns of products with one year or less of remaining shelf life.
• No Restocking Fee will be charged if Aircraft Shop Supply is responsible for incorrectly shipping a product, or if the order is damaged upon leaving the warehouse.
• Hazardous Materials & Dangerous Goods: These items are sold as final and are not eligible for return approval.