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LOCTITE® 680™
LOCTITE® 680™ high-strength retaining compound that is used for bonding active metals and passive substrates such as stainless steel and plated surfaces. It provides durable, vibration-resistant bonds, prevents corrosion, and works well In challenging conditions to prevent loosening and leaking of bonds, making it ideal for heavy machinery and automotive applications.
- Manufacturer: Henkel
- Product Line: LOCTITE® Retaining Compounds
- Product: LOCTITE® High Strength Retaining Compounds
- Industries: Adhesives | Building & Construction | Maintenance, Repair, Overhaul | Metal Processing & Fabrication
- Authorized Countries: Canada | Mexico | United States
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Overview
LOCTITE® 680™ is an advanced adhesive solution that provides high strength retaining performance and exceptional bonding and securing for a wide range of applications. These compounds are formulated to create a strong, durable bond between close-fitting metal surfaces, such as active mild steel and passive substrates, such as stainless steel and plated surfaces. It is used for the bonding of close fitting cylindrical fitting parts, such as shafts, retaining sleeves, pulleys, rotors, gears, mounting sleeves, bushings, and more, with a robust curing performance due to its anaerobic formulation.
The superior physical properties of LOCTITE® 680™ provides excellent resistance to minor surface contaminations from various oils as well as high temperature performance, ensuring a strong bond in demanding environments. It also prevents loosening and leakage commonly caused by shock and vibration during operation.
Specifications
Chemical type: Methacrylate ester
Appearance (uncured): Green liquid
Fluorescence: Positive under UV light
Components: One component – requires no mixing
Viscosity: Medium
Viscosity, Brookfield - RVT, 25°C, mPa·s (cP) (Spindle 3, speed 20 rpm): 750 to 1,750
Viscosity, Cone & Plate, 25 °C, mPa·s (cP) (Shear rate 129 s): 650 to 1,850
Cure: Anaerobic
Secondary Cure: Activator
Strength: High
Specific Gravity @ 25°C: 1.1
Features & Benefits
High strength retaining compound
Anaerobic adhesive
Fills bond gaps up to 0.5 mm
Maximum strength at room temperature
Cures when confined in the absence of air
Prevents loosening and leakage from shock and vibration
Robust curing performance
Low viscosity
Prevents metal fretting and corrosion
Tolerates surface contaminations from oils, such as cutting, lubrication, anti-corrosion and protection fluids
Non-running
High temperature and oil tolerance
Works on active metals (e.g. mild steel) and passive substrates such as stainless steel and plated surfaces
Problems Solved
Backlash in worn assemblies
Loosening and leakage from shock and vibration
The need for remachining to repair equipment
Inability of adhesive to fill difficult-to-reach cracks and crevices
Contamination of bonds from oils, such as cutting, lubrication, anti-corrosion, and protection fluids
Applications
Bonding of cylindrical parts
Restoring correct fits on worn shafts, spun bearings, and damaged keyways
Locating pins in radiator assemblies
Locking bushings and sleeves into housings and on shafts
Repairing worn machine parts
Related Applications
Adhesives
Building & Construction
Maintenance, Repair, Overhaul
- Assembly & Run-in
- Bearings
- Electric Motors
- Gear Boxes
- Machining
- Noise, Vibration, Harshness
- Pumps
- Threads & Thread Connections
- Valves, Packings, Seals & O-Rings
Related Chemistries
Related End Markets
Maintenance, Repair, Overhaul
- Facility Infrastructure
- General Industrial
- Heavy Industry
- Metal Processing & Fabrication
- Transportation
Related Functions
Adhesives
Building & Construction
Maintenance, Repair, Overhaul
Metal Processing & Fabrication
Related Technologies
Adhesives
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