Loctite 55 is a high-strength, threadlocking adhesive designed to prevent threaded fasteners from loosening due to vibration or shock. It is a single-component, anaerobic adhesive that cures when confined between close-fitting metal surfaces, forming a permanent bond. This article will provide a comprehensive overview of Loctite 55, including its benefits, applications, usage instructions, and additional tips and tricks.
Loctite 55 is suitable for a wide range of threaded fastener applications, including:
To use Loctite 55 effectively, follow these steps:
Property | Value |
---|---|
Viscosity | 500 mPa·s |
Color | Green |
Cure Time | 24 hours at room temperature |
Tensile Strength | 10,000 psi |
Temperature Range | -65°F to 300°F |
Chemical | Resistance |
---|---|
Water | Excellent |
Oil | Good |
Solvents | Fair |
Acids | Poor |
Bases | Poor |
Adhesive | Strength | Cure Time | Applications |
---|---|---|---|
Loctite 55 | High | 24 hours | General purpose |
Loctite 242 | Medium | 12 hours | Less demanding applications |
Loctite 271 | High | 2 hours | High-temperature applications |
Story 1:
A mechanic was working on a car engine when he realized that one of the bolts holding the timing cover had loosened. He had forgotten to apply threadlocking adhesive, and the constant vibration of the engine had caused the bolt to work itself free. The mechanic had to disassemble the timing cover and reinstall the bolt with Loctite 55 to prevent it from loosening again.
Lesson learned: Always use threadlocking adhesive on critical threaded fasteners to prevent loosening and potential failures.
Story 2:
An assembly line worker was assembling a medical device when one of the screws that held the device together snapped off. The screw had been overtightened, and the stress concentration at the threads caused it to fail. The worker had to remove the broken screw and replace it with a new one, using Loctite 55 to ensure that it would remain secure.
Lesson learned: Avoid overtightening threaded fasteners, as this can damage the threads and lead to premature failure. Use threadlocking adhesive to prevent loosening and ensure long-term durability.
Story 3:
An engineer was designing a new product that required the use of threaded fasteners. He wanted to use a threadlocking adhesive that could withstand high temperatures and vibrations. He chose Loctite 55, which was rated for temperatures up to 300°F and had excellent resistance to vibration. The engineer's design was successful, and the threaded fasteners remained secure even under extreme conditions.
Lesson learned: Consider the specific requirements of your application when selecting a threadlocking adhesive. Loctite 55 is a versatile adhesive that meets the needs of most industrial and automotive applications.
Loctite 55 matters because it helps to prevent threaded fasteners from loosening due to vibration or shock. This is critical for applications where the failure of a fastener could have serious consequences, such as in automotive engines, industrial machinery, and medical devices. By using Loctite 55, you can ensure that your threaded fasteners will remain secure and your assembly will function properly.
1. What is the difference between threadlocking adhesives and thread sealants?
Threadlocking adhesives, such as Loctite 55, are designed to prevent threaded fasteners from loosening due to vibration or shock. Thread sealants, on the other hand, are designed to prevent leakage between threaded surfaces.
2. Can Loctite 55 be used on all types of metals?
Loctite 55 is compatible with most metals, including steel, stainless steel, aluminum, and brass. However, it is not recommended for use on soft metals, such as lead or zinc.
3. How long does it take for Loctite 55 to cure?
Loctite 55 typically cures in 24 hours at room temperature. However, the cure time can be accelerated by applying heat.
4. Is Loctite 55 toxic?
Loctite 55 is not considered to be toxic, but it is important to avoid contact with skin and eyes. If contact occurs, rinse the affected area with water.
5. How do I remove Loctite 55?
If you need to remove Loctite 55, you can use a drop of oil or apply heat. If all else fails, you can use a commercial threadlocker remover.
6. Where can I buy Loctite 55?
Loctite 55 is available at most hardware stores and online retailers.
Loctite 55 is a high-strength, threadlocking adhesive that provides a reliable and cost-effective solution for preventing threaded fasteners from loosening. By understanding the benefits, applications, and usage instructions of Loctite 55, you can ensure that your threaded fasteners will remain secure and your assembly will function properly.
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