Are you looking to cut through metal with an angle grinder, but not sure which blade to use?
With so many options available, it can be overwhelming to choose the right one for your project. But fear not, we’ve got you covered.
In this article, we’ll explore the different types of angle grinder blades and their suitability for cutting metal. Whether you’re a professional fabricator or a DIY enthusiast, understanding the right blade for the job can make all the difference in achieving a clean and precise cut.
So, let’s dive in and discover what angle grinder blade cuts metal best.
What Angle Grinder Blade Cuts Metal
When it comes to cutting metal with an angle grinder, there are a few factors to consider. The cutting capacity of the angle grinder, the size and type of disc being used, and the thickness of the material being cut all play a role in determining the best blade for the job.
For cutting thin metal materials like sheet metal, a 1.0mm or 0.8mm cutting disc is recommended. These thinner discs provide a cleaner cut and minimize any potential discoloration due to less heat transmission.
When cutting thicker, heavier steel like rebar or structural steel like angle iron, a cutting disc with a thickness of 1.6mm or 2.5mm is necessary. However, using a larger blade like a 2.5mm cutting disc can result in discolouration due to increased friction and slower blade speed.
For cutting through almost any metal with precision and accuracy, a bench mounted drop saw with a 14” 350mm or 16” 400mm cutting blade is most suitable for heavier steel work. This tool is particularly useful for cutting repetitive lengths of steel quickly and accurately.
An angle grinder is also a popular and versatile power tool for cutting metal due to its size, affordability, and portability. Angle grinders come in different sizes to suit different sizes of abrasive cutting discs. Each angle grinder operates at a different RPM to suit the respective disc, so it’s important not to fit an incorrect sized disc on an angle grinder.
Diamond blades are another option for cutting through ferrous metal with an angle grinder. These blades last longer, cut faster and cleaner, and wear down much slower than abrasive discs.
Understanding The Anatomy Of An Angle Grinder Blade
To better understand how an angle grinder blade cuts through metal, it’s important to understand its anatomy. An angle grinder blade consists of a circular disc made of abrasive material, such as aluminum oxide or silicon carbide. The disc is mounted onto the spindle of the angle grinder, which is powered by an electric or pneumatic motor.
The size and thickness of the blade will depend on the type of material being cut and the cutting capacity of the angle grinder. Thinner blades are recommended for cutting thin metal materials to minimize heat transmission and potential discoloration. Thicker blades are necessary for cutting through thicker, heavier steel.
The blade’s abrasive material is what actually cuts through the metal. As the blade rotates at high speed, the abrasive particles on its surface grind away at the metal, creating a cut. The angle at which the blade is held against the metal also plays a role in determining the quality of the cut.
It’s important to note that not all angle grinder blades are suitable for cutting metal. For example, diamond blades are specifically designed for cutting through ferrous metal and offer faster and cleaner cuts than abrasive discs.
In addition to the blade itself, other components of the angle grinder play a crucial role in its ability to cut through metal. The spindle and its related parts hold the blade in place and allow it to rotate at high speeds. The main body or head of the angle grinder also plays an important role in providing stability and control during cutting.
Types Of Angle Grinder Blades For Cutting Metal
There are several types of angle grinder blades available for cutting metal, each with its specific purpose and advantages.
1. Cut-off wheels: These are the most commonly used blades for cutting metal. They are thin and can cut through various metals like steel, aluminum, and copper. They come in different thicknesses, ranging from 0.8mm to 2.5mm, depending on the thickness of the metal being cut.
2. Diamond blades: These blades are ideal for cutting through hard materials like concrete, tiles, and stones. The diamond grits embedded into the edges of a steel disc make it efficient for cutting through these materials with precision and ease.
3. Flap discs: These discs are used for smoothing rough surfaces before welding or painting. They can also be used for removing rust or paint from metal surfaces.
4. Ceramic sanding discs: These discs are designed to sand down rough surfaces without overheating the metal. They are ideal for removing scratches or imperfections on metal surfaces.
5. Strip discs: These discs are less invasive and are used for removing rust or paint without damaging the underlying metal surface.
6. Grinding wheels: These wheels are used for smoothing rough edges on metal surfaces. They come in different grits and can be used for both light and heavy grinding tasks.
7. Wire wheels: These wheels are used for removing rust, paint, and other adhesives from metal surfaces. They come in different wire thicknesses and can be used for various cleaning tasks.
When choosing an angle grinder blade for cutting metal, it’s important to consider the type and thickness of the metal being cut, as well as the desired finish. Always wear appropriate personal protective equipment when using an angle grinder and follow proper safety procedures to avoid injury.
Choosing The Right Blade For Your Project
Choosing the right blade for your project is crucial to achieving a clean and precise cut. The type and thickness of the material being cut, as well as the desired finish, all play a role in determining the appropriate blade.
For cutting softer metals like aluminum or copper, a non-ferrous blade is recommended. These blades are designed to cut through materials that do not contain iron and will provide a cleaner cut without damaging the material.
When cutting through harder metals like stainless steel or cast iron, a ferrous blade is necessary. These blades are designed to cut through materials that contain iron and will provide a clean and precise cut without damaging the material.
For the best results, use a diamond blade that’s rated to cut the type of metal you are working with. These blades are incredibly durable and will last much longer than traditional abrasive discs. They also provide a cleaner cut with less chance of discoloration due to their superior strength and hardness.
It’s important to choose the correct size blade for your angle grinder to ensure safe and efficient operation. Each angle grinder operates at a different RPM to suit the respective disc, so it’s important not to fit an incorrect sized disc on an angle grinder.
Tips For Cutting Metal With An Angle Grinder Blade
Cutting metal with an angle grinder blade can be a tricky task, but with the right technique and equipment, it can be done easily and safely. Here are some tips to help you get the best results:
1. Use the right disc: As mentioned earlier, different types of discs are suitable for different thicknesses of metal. Make sure you select the right disc for the job.
2. Wear protective gear: Always wear protective gear like gloves, earmuffs, and safety glasses when cutting metal with an angle grinder blade. This will protect you from any flying debris or sparks.
3. Secure the metal: Use a C-clamp to secure the metal firmly on a flat surface before cutting it. This will prevent it from moving around and causing any accidents.
4. Start slow: Begin by using light pressure on the blade and gradually increase it as you go along. This will prevent any kickbacks and ensure a smoother cut.
5. Watch the metal: Keep an eye on the metal as you cut it to ensure that you’re cutting in a straight line and not deviating from your intended path.
6. Let the blade do the work: Don’t apply too much pressure on the blade, as this can cause it to break or wear out faster. Instead, let the blade do the cutting for you by using moderate pressure.
7. Keep the blade cool: Cutting metal generates heat, which can cause the blade to wear out faster. To prevent this, take breaks between cuts to let the blade cool down.
By following these tips, you can ensure that your angle grinder blade cuts through metal cleanly, accurately, and safely.
Safety Precautions To Keep In Mind While Using An Angle Grinder Blade.
While using an angle grinder blade to cut metal, it’s important to keep safety precautions in mind to prevent accidents and injuries. Here are some tips to follow:
1. Always ensure that the safety guard is facing your body and is not removed. The safety guard is designed to keep you safe and should never be removed.
2. Avoid working in flammable areas as angle grinders can generate a lot of sparks. Keep any items that can readily catch fire, such as aerosol or gas cans, or an oily rag, at a safe distance.
3. Choose the right disc for the angle grinder. A disc that is too large or too small for the grinder can increase the risk of shattering and cause potentially deadly consequences.
4. Use two hands to operate the grinder, with one hand gripping the handle and dead-man switch (if provided), while the other hand supports the weight of the tool.
5. Hold the grinder against the work piece with minimum pressure, so the disc does not ‘grab’ and cause it to kickback.
6. Keep the grinding disc at a 15 to 30-degree angle to the object and ensure that the work piece is held firmly either as part of a larger item or in a bench vice.
7. Adopt a comfortable stance with feet apart so you feel well-balanced, and ensure you have a clear view of the job.
8. Stop at regular intervals for a short break to rest your hands and arms.
9. Never put a grinder down until the disc stops rotating.
10. Remove the plug from the power point before changing discs.
11. Always use a cutting disc for cutting and a grinding disc for grinding.
12. Never use a cutting disc for grinding or a grinding disc for cutting.
13. Ensure that the disc guard is in place prior to operating an angle grinder, as it is designed to deflect debris off your body and protect you from injury.
By following these safety precautions, you can ensure that you use an angle grinder blade safely and efficiently while cutting metal.