
Cutting metal nails between boards can be a challenging task. The most suitable tool for the job will depend on the specific requirements and constraints of the project, such as the hardness of the metal, the diameter of the nail, the space available, and the desired finish. Here are some common tools and methods used to cut metal nails between boards:
| Characteristics | Values |
|---|---|
| Safety | Wear safety goggles, hearing protection, and eye protection. Keep a fire extinguisher handy. |
| Tools | Grinder, mini grinder, Dremel, bolt cutter, tile nipper, vise grips, MultiMaster, carbide-toothed TS blades, SMART Bi-Metal blade, reciprocating saw, diamond grinding wheels, angle grinder, oscillating tool, jigsaw, wire cutters, hacksaw, rotary cutter, crescent bolt cutters, end nippers |
| Technique | Use a grinding wheel, cutoff wheel, or cut-off disc. Apply oil primer. Use a hack saw motion. Drill and use needle-nosed pliers. Use a metal detector. Use a carbide blade. |
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What You'll Learn

Using a grinder
First, select an appropriate grinder for the task. Angle grinders are the most powerful metal-cutting tools available and are commonly used for cutting heavy bolts. They typically have large cutting blades with a diameter of 4.5 inches. However, smaller grinders, such as a 4-inch grinder, can also be effective for cutting metal nails. Choose a grinder size that allows you to maneuver easily in the space between the boards.
Next, equip your grinder with the right cutting wheel or disc. A diamond grinding wheel or a cutoff wheel is ideal for cutting metal nails. Diamond grinding wheels can be affixed to both small and large rotary cutters, providing versatility. If you opt for a cutoff wheel, ensure it is reinforced for added durability. Avoid using a grinding wheel, as it will create metal shavings that can stick to paint and cause rust spots.
Before starting the grinder, ensure you are wearing the appropriate safety gear. Wear safety goggles or eye protection to shield your eyes from sparks and metal shards. Hearing protection, such as earplugs, is also recommended due to the loud nature of grinders. Additionally, keep a fire extinguisher nearby as a safety precaution.
When using the grinder, establish a steady rhythm. With practice, you can achieve perfectly flush cuts with the surface in approximately five to ten seconds per nail. Maintain a firm grip on the grinder and apply consistent pressure to ensure a smooth and controlled cut. Be cautious of the surrounding area to avoid damaging the boards or any nearby surfaces.
Finally, be mindful of the limitations and potential drawbacks of using a grinder. Grinder discs and wheels can wear down relatively quickly, and you may need to replace them during the project. Additionally, the cutting process may generate sparks and hot metal chips, so ensure the work area is clear of any flammable materials and bystanders. Regularly inspect your grinder's components and follow the necessary maintenance procedures to keep it in good working condition.
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Employing a reciprocating saw
When using a reciprocating saw, it is essential to select the right blade for the specific task. In this case, a metal-cutting blade is required to cut through metal nails. These blades typically have a minimum of 10 teeth per inch, with higher tooth counts yielding smoother cuts. Additionally, consider using a bi-metal or carbide-tipped blade, which can handle both wood and metal, reducing the risk of dulling or bending when encountering nails.
Before starting the cutting process, it is important to wear the appropriate safety gear. Eye and ear protection are crucial to safeguard against flying debris and noise. Sturdy gloves are also recommended to protect your hands from potential cuts. Ensure that you have a firm grip on the saw and a stable surface to work on.
When cutting with a reciprocating saw, it is generally advisable to set the tool to a slower speed than when cutting wood. This slower speed extends the blade's life and provides more control and precision during the cut. It is also beneficial to adjust the "shoe" or "fulcrum" of the saw, which helps control the depth of the cut and guides the blade's movement.
During the cutting process, it is important to maintain control and adjust the cutting angle as needed. Start slowly, and then gradually increase speed. If you encounter resistance, stop and check for any potential obstacles, such as large nails or metal pieces. Once the cut is complete, release the trigger and carefully withdraw the blade to prolong its life.
By following these steps and employing a reciprocating saw with the correct blade and safety precautions, you can effectively cut metal nails between boards. This method can save time and effort compared to manual techniques, making it a preferred choice for construction and demolition projects.
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Snipping with bolt cutters
Bolt cutters are a type of heavy-duty cutting tool designed to cut through metal fasteners such as screws, bolts, and nails, as well as other materials like steel chains, padlocks, and rebar. They are ideal for cutting metal nails between boards due to their long handles and geared cutting mechanism, which magnifies the force applied to the handles.
- Ensure you have the appropriate size of bolt cutters for the job. Bolt cutters come in a variety of sizes, so select one that fits fully around the shank of the nail.
- Create space for the bolt cutters if the nail is embedded in the board. You may need to chisel out some wood to allow the tool to sit closely to the pivot point, maximizing force for the cut.
- Position the bolt cutters' jaws around the shank of the nail. Ensure the tool is firmly in place and that you have a stable grip on the handles.
- Apply force to the handles of the bolt cutters. The long handles provide leverage, allowing you to generate significant cutting force with minimal effort.
- Cut through the nail. Depending on the hardness of the metal and the thickness of the nail, you may need to make multiple cuts or adjust the pressure applied.
- Inspect the cut nail. In some cases, bolt cutters may leave a stub, so additional snipping or filing may be necessary to achieve a smooth finish.
Bolt cutters are a versatile and powerful tool for cutting metal nails between boards. They are simple to use and do not require electricity, making them a convenient option for various applications.
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Sawing with a Bi-Metal SMART blade
SMART has developed a 32mm Bi-Metal blade that can cut through nails without ruining the blade. This blade is designed for cutting wood, nails, and non-ferrous metals. It offers universal cutting up to 51mm deep and is recognised as a safe option for cutting timber with hidden nails. The Bi-Metal SMART blade is small enough to fit through awkward spaces, making it an effective tool for tradesmen who want to get the job done quickly.
To use the Bi-Metal SMART blade, attach the blade to your multi-tool and position it against the bottom of the nail, with the blade sitting flat against the timber. Begin cutting through the bottom of the nail by continuously moving the blade side to side in a hack saw motion until the nail has been fully removed. The hack saw motion increases the life of your blade as it helps to spread the load across the teeth.
Bi-metal blades are composed of two different types of metals bonded together to form a single blade. The blade's body is typically made of a flexible and durable spring steel, while the teeth or cutting edge are formed using a high-speed steel (HSS) or cobalt alloy. This combination allows bi-metal blades to excel in durability, enabling them to cut through various materials such as wood, metal, plastic, and more.
Bi-metal blades offer enhanced performance and longevity. They are ideal for heavy-duty applications such as demolition work, metal cutting, and pipe fitting. The high-speed steel teeth offer exceptional hardness, heat resistance, and wear resistance, making them suitable for cutting tough materials such as stainless steel and alloy steel.
Overall, the Bi-Metal SMART blade is a safe and effective tool for cutting through nails embedded in timber, providing precision, durability, and ease of use for tradespeople and DIY enthusiasts alike.
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Using a Dremel with a cut-off disc
To use a Dremel with a cut-off disc for this task, follow these steps:
Firstly, ensure you have the correct cut-off wheel for the job. In this case, you will need a cut-off wheel made of an abrasive material designed for cutting metal. The Dremel EZ Lock Metal Cut-Off Wheel, for example, can be used on various metal types and is reinforced with fibreglass for increased durability.
Next, attach the cut-off wheel to your Dremel. To do this, locate the collet nut at the end of the Dremel and insert the mandrel, a small metal shaft that holds the cut-off wheel in place. Once the mandrel is inserted, place the cut-off wheel onto the mandrel.
Now, you can turn on your Dremel and set it to the desired speed. It is important to use the right speed setting, as too high or too low a speed can damage the cut-off wheel or the material you are cutting. Hold the Dremel firmly with both hands and place the cut-off wheel on the nail you wish to cut. Apply gentle pressure to the Dremel and move it along the nail until you have completed the cut. Remember to take breaks to prevent the Dremel from overheating and to avoid hand fatigue.
Throughout the process, it is crucial to prioritise safety. Always wear eye protection and gloves to shield yourself from sparks and flying debris. Additionally, ensure that you do not apply excessive pressure to the Dremel and that you do not exceed the RPM limits specified by the manufacturer.
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