LOCTITE 660

LOCTITE 660 is a high-strength anaerobic retaining compound specifically engineered for bonding cylindrical fitting parts. This advanced formulation effectively fills bond gaps that can approach 0.50 mm (0.02 in.), restoring correct fits on worn components. It cures reliably when confined in the absence of air between close-fitting metal surfaces, preventing loosening and leakage from shock and vibration in demanding industrial environments.

General Information of LOCTITE 660

LOCTITE 660 utilizes an acrylic-based urethane methacrylate chemistry, presenting as a distinct metallic gray paste. This product is a convenient one-component system, eliminating the need for pre-mixing before application. Its primary cure mechanism is anaerobic, meaning it hardens in the absence of air. This characteristic makes it ideal for sealing and retaining metal-to-metal assemblies where oxygen is excluded. Furthermore, LOCTITE 660 exhibits excellent gap cure characteristics. This ensures robust performance even when dealing with larger tolerances or worn parts. An activator can be used to accelerate cure speed, particularly on inactive metals or in situations with very large gaps.

Key Features & Technical Benefits

• High Strength Retaining: LOCTITE 660 provides superior bonding for cylindrical components. It ensures maximum load transmission and uniform stress distribution across the joint.
• Exceptional Gap Filling: This compound effectively fills bond gaps up to 0.50 mm (0.02 in.). Consequently, it restores original fit and tolerance on worn shafts, housings, and keyways.
• Anaerobic Cure Reliability: The product cures when confined between metal surfaces, without requiring external air exposure. This ensures a consistent and reliable cure in challenging assembly conditions.
• Vibration and Shock Resistance: Once cured, LOCTITE 660 forms a durable bond that resists loosening. It protects assemblies from the detrimental effects of shock and vibration, enhancing operational longevity.
• One-Component Convenience: As a single-component adhesive, LOCTITE 660 simplifies application processes. It eliminates the need for complex mixing, reducing potential errors and improving production efficiency.

Typical Industrial Applications

This formulation is engineered for the following applications:

• Restoring correct fits on worn shafts and housings, extending equipment lifespan.
• Securing spun bearings and bushings, preventing rotational movement and wear.
• Repairing damaged keyways and splines, ensuring proper power transmission.
• Bonding cylindrical parts where high strength and gap filling are critical.