Alexei Volkov
A mitre box is a tool used to guide a hand saw for making precise cuts, typically at a 45-degree angle. While some mitre boxes are made of plastic, others are made of metal. Lubrication is an important aspect of maintaining a mitre box, especially for those with sliding components. Proper lubrication can help improve the performance and precision of cuts, as well as extend the lifespan of the tool. There are various lubricants available, including silicone spray, dry lubricants, wet oils, and proprietary products such as Boeshield, each with its own advantages and considerations. In this discussion, we will explore the different methods and products available for lubricating a plastic mitre box, ensuring smooth and efficient usage.
Characteristics and Values Table for Plastic Mitre Box Lubrication
| Characteristics | Values |
|---|---|
| Lubricants | Silicone-based spray, Silicone with Teflon spray, WD-40, Mineral oil, Dry lubricant, Wet oil, Light oil, Trans fluid, Boeshield, TDL |
| Steps | 1. Turn off the saw and verify the blade is not moving. 2. Unplug the saw and set it on a flat surface. 3. Remove the cover or guard. 4. Spray compressed air to remove debris. 5. Clean the connecting bolt and apply lubricant. 6. Spread lubricant over the blade by hand and let it soak. 7. Wipe off excess lubricant with a clean rag. 8. Put the cover back and test the saw. |
| Tips | Use dry lubricant for longer-lasting results. Avoid heavy lubricants as they attract dirt and dust. |
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What You'll Learn
Using a silicone-based spray
Silicone spray is a versatile lubricant that can be used on plastic surfaces, including plastic mitre boxes. It is safe to use and will not react with most substances. It is also non-oxidising, which means it will maintain its greasiness and effectiveness over a wide temperature range.
To use a silicone-based spray to lubricate a plastic mitre box, start by ensuring the surface is clean and free of debris. If the plastic cover is not moving as it should, blast the area with compressed air. If this does not solve the problem, carefully remove the cover by unscrewing it. Once removed, use compressed air again to clean the parts, removing any old lubricant or debris.
After cleaning, you can apply the silicone spray. Ensure you are in a well-ventilated area and follow the instructions on the product for safe application. Spray an even coat onto the desired area, being careful to avoid overspray on surrounding surfaces. Allow the lubricant to dry completely. Silicone spray typically dries clear and will not leave a mess or attract dirt.
It is important to note that silicone spray should not be used on electrical connections, switches, or relays, as it can cause contact problems. Additionally, be cautious when using silicone spray near wooden surfaces, as it can cause issues with finishes. Always refer to the manufacturer's instructions and take the necessary precautions when using any lubricant.
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Applying mineral oil to the blade
It is recommended to use food-grade mineral oil, which is chemically stable, tasteless, hydrophobic, and does not support bacterial growth. This type of mineral oil can be found at hardware stores, pharmacies, Target, or Amazon for under $10.
Before applying mineral oil, it is important to clean the blade thoroughly. Compressed air can be used to remove sawdust and debris, and the blade should be inspected for any signs of rust or corrosion. If necessary, use a cleaning agent like WD-40 and a Scotch-Brite pad to remove any corrosion or old lubrication.
After cleaning and drying the blade, apply a few drops of mineral oil and use a designated towel to rub it into the blade and handle. This process will help keep the mitre saw blade in good condition and protect it from the elements.
While some people consider mineral oil application as part of lubrication maintenance, others view it primarily as a cleaning technique. It is worth noting that working in a damp environment may reduce the need for frequent blade lubrication, as rust and corrosion are less likely to occur in such conditions.
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Cleaning with compressed air
While compressed air can be used to clean a miter saw, it is important to exercise caution as it can be dangerous, and even deadly, when misused. Air compressors are not designed for cleaning, but it is a common practice to use compressed air to clean dust and debris from filters, machinery, and surfaces.
If your plastic mitre box is not moving as freely as it should, blasting the area with compressed air should help. You can use canned air or an air compressor to spray compressed air and remove as much sawdust and debris as possible, not just from the affected area but from the entire tool.
However, it is important to be aware of the risks associated with cleaning using compressed air. Compressed air can exert extremely high forces that can turn small particles, nuts, bolts, and other bits into high-velocity projectiles, causing severe damage or injury. Even dust and dirt can cause skin abrasions when forced at high speeds.
Additionally, when compressed air comes into contact with the body, it can cause significant health complications. For example, it can rupture internal organs if it enters the mouth, navel, or bloodstream. It can also cause permanent hearing loss if blown near the ears and can even blow an eye out of its socket.
To mitigate these risks, it is essential to follow safety guidelines when using compressed air for cleaning. In some places, such as Canada and the United States, there are laws and regulations governing the use of compressed air for cleaning. Always refer to these guidelines and take the necessary precautions to protect yourself and others from potential harm.
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Using a dry lubricant
Lubricating a plastic mitre box is important to reduce friction and wear, lower power consumption, and increase the life of the plastic components. When choosing a lubricant, it is essential to consider compatibility with the plastic material.
Dry lubricants are a good option for plastic mitre boxes as they provide enhanced lubrication and protection. They leave behind a dry film that resists dirt, dust, and oil, ensuring a clean and mess-free application. Dry lubricants are suitable for use on various surfaces, including plastic, metal, wood, rubber, and glass, and can work across a wide temperature range.
One example of a dry lubricant is the WD-40 Specialist Anti-Friction Dry PTFE Lubricant. This product is formulated with PTFE (polytetrafluoroethylene), also known as Teflon, which provides a non-stick surface. It is suitable for use on plastic and can be used in most temperatures, making it a versatile option.
Another option is to use a silicone-based dry lubricant, such as the 3-IN-ONE Easy Slide Silicone Spray Lubricant. Silicone-based lubricants are compatible with plastic and offer excellent performance in a wide temperature range, typically from -90°F to 425°F. They provide reliable protection, reduce friction, and extend the lifespan of items and machinery. Additionally, they repel dirt, dust, and moisture, leaving no sticky residue.
When using a dry lubricant, it is important to follow the manufacturer's instructions and take the necessary safety precautions. Ensure that the lubricant is compatible with the plastic material of your mitre box and always test it on a small area first to check for any adverse reactions.
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Applying wet oil to plastic parts
When lubricating plastic parts, it is important to understand how different types of oils can affect the material. While oil and plastic may seem like incompatible materials, their interaction can lead to surprising changes in the properties of both materials.
For instance, motor oil can cause certain plastics to become brittle, cracked, or discoloured. However, some plastics, such as nylon, polypropylene, or certain types of high-density polyethylene, are compatible with motor oils.
Perfluoropolyether oils are highly stable fluids that can withstand extreme temperatures and pressures. They are often used in high-performance applications and are compatible with most plastics. Polytetrafluoroethylene (PTFE) is particularly suited for use with perfluoropolyether. Castor oil is another option that is generally safe for use with most plastics, although it is recommended to use plastics that are resistant to castor oil, such as polypropylene or PET.
When applying wet oil to plastic parts, it is important to follow these steps:
- Identify the type of plastic and ensure that it is compatible with the wet oil you plan to use.
- Clean the plastic parts to remove any debris or old lubricant. This can be done by blasting the area with compressed air or using a solvent if necessary.
- Choose the appropriate wet oil for the application. Common options include mineral oil, silicone-based sprays, or lubricants with Teflon.
- Apply the wet oil to the plastic parts following the instructions on the product. Ensure that you only apply it to the intended areas and avoid any unwanted surfaces.
- Allow the wet oil to dry and form a protective barrier on the plastic surface.
- Test the lubricated plastic parts to ensure they are functioning smoothly and effectively.
By following these steps and choosing the appropriate wet oil, you can effectively lubricate plastic parts while also preserving their condition and functionality.
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Frequently asked questions
If your plastic mitre box is not moving as smoothly as it should be, it may need lubrication.
You can use a silicone spray with Teflon, a dry lubricant, or a wet oil. You can also use WD-40, but this may not be as effective and will need to be applied before each use.
First, turn off the saw and unplug it. Then, spray compressed air onto the mitre box to remove any sawdust and debris. Finally, apply a small amount of your chosen lubricant to the blade and spread it by hand.
It depends on how often you use your mitre box and the conditions of your workspace. If your mitre box is exposed to dust and debris, you may need to lubricate it more frequently. As a general rule, it is recommended to lubricate your mitre box when it becomes difficult to slide or move smoothly.
