Loctite 680 is a high-strength, wicking grade, anaerobic sealant and threadlocker specifically designed for sealing and locking threads in applications where high strength and minimal shrinkage are required. As a prominent product in the Loctite lineup, it has garnered attention for its versatility and performance in various industrial settings, including automotive, aerospace, and manufacturing. The formulation of Loctite 680 is based on a unique blend of monomers and polymers that cure in the absence of air (anaerobically) to form a strong, durable bond that resists vibration and environmental stress.
The unique wicking properties of Loctite 680 allow it to penetrate deep into the microscopic gaps and crevices between threaded parts, ensuring a complete seal and lock. This characteristic is particularly beneficial in applications where traditional threadlocking compounds may not be effective due to the tight tolerances or complex geometries of the components involved. Moreover, the minimal shrinkage of Loctite 680 upon curing minimizes the risk of part distortion, making it suitable for use with precision components and in assemblies where dimensional stability is critical.
Key Points
- High-strength anaerobic sealant and threadlocker for industrial applications
- Wicking grade formulation for deep penetration into threaded parts
- Minimal shrinkage to prevent part distortion
- Resistant to vibration and environmental stress
- Suitable for use in precision components and assemblies requiring dimensional stability
Applications and Usage
Loctite 680 finds its application in a variety of industries where the reliability and integrity of threaded fasteners are paramount. In the automotive sector, it is used for locking and sealing engine bolts, gearbox components, and other critical fasteners subjected to high stress and vibration. In aerospace, its high strength and resistance to extreme temperatures make it an ideal choice for securing fasteners in aircraft engines, gearboxes, and other critical assemblies. Additionally, in manufacturing, Loctite 680 is used for sealing and locking threads in machinery, pumps, and valves, where leakage or fastener loosening could lead to significant downtime and maintenance costs.
Technical Specifications
Understanding the technical specifications of Loctite 680 is crucial for its effective application. It has a viscosity of approximately 1000 cP, which allows for easy application and wicking into tight spaces. The breakaway torque of Loctite 680 is significantly high, typically in the range of 20-30 Nm on M10 bolts, indicating its ability to resist loosening under vibration. Furthermore, its temperature range is quite broad, from -55°C to +150°C, making it suitable for a wide range of applications. The cure speed of Loctite 680 can be accelerated with the use of activators, allowing for faster assembly and reduced production time.
| Property | Value |
|---|---|
| Viscosity (cP) | 1000 |
| Breakaway Torque (Nm) on M10 bolts | 20-30 |
| Temperature Range (°C) | -55 to +150 |
| Cure Speed (minutes) | 5-15 |
Comparison with Other Threadlockers
Loctite 680 stands out among other threadlockers due to its unique combination of high strength, minimal shrinkage, and wicking properties. While other products, such as Loctite 242 or Loctite 262, may offer similar benefits, they are often tailored to more specific applications. Loctite 242, for instance, is a general-purpose threadlocker with a lower strength than Loctite 680 but is suitable for a broader range of materials and applications. Loctite 262, on the other hand, is a high-strength threadlocker designed for applications requiring extreme resistance to vibration and thermal stress, but it may not offer the same level of wicking as Loctite 680.
Precautions and Safety
When working with Loctite 680, as with any chemical product, it is essential to follow proper safety precautions. This includes wearing protective gloves, safety glasses, and working in a well-ventilated area to prevent inhalation of vapors. Skin and eye contact should be avoided, and in case of accidental contact, the affected area should be flushed with water and medical attention sought if irritation persists. Additionally, Loctite 680 should be stored in a cool, dry place, away from direct sunlight and heat sources.
What is the primary use of Loctite 680?
+Loctite 680 is primarily used as a high-strength anaerobic sealant and threadlocker for industrial applications requiring minimal shrinkage and high resistance to vibration and environmental stress.
How does the wicking property of Loctite 680 benefit its application?
+The wicking property of Loctite 680 allows it to penetrate deep into the microscopic gaps and crevices between threaded parts, ensuring a complete seal and lock, which is particularly beneficial in applications with tight tolerances or complex geometries.
What safety precautions should be taken when handling Loctite 680?
+When handling Loctite 680, it is essential to wear protective gloves and safety glasses, work in a well-ventilated area, and avoid skin and eye contact. In case of accidental contact, the affected area should be flushed with water, and medical attention sought if irritation persists.
