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Easy Guide for Using an Angle Grinder to Cut/Grind Metal & Other Materials

An angle grinder is one of the most versatile tools that can be used for many different types of work. For example, if you wish to go for metal fabrication or metal polishing, you might want to consider buying an angle grinder. Furthermore, you can use an angle grinder for various jobs based on your requirement. If you want to remove rust or paint from your metal, you can use a wire brush, or if you want to slice a concrete piece of material, you can go for a cutting wheel. You can easily find various types of disks in hardware stores. Read on to know how to use an Angle Grinder safely and correctly.

What is an Angle Grinder?

An angle grinder is a tool that can be used to grind, sand, cut, or various polish types of materials such as metal, stones, bricks, or any concrete material. It is a hand-held power tool that consists of disks instead of blades to cut or sharpen a material. You can use it with various disks that come in different sizes. Angle grinders can be either cordless or battery-powered based on different brands and functions. If you are a regular user of angle grinders, a corded angle grinder with motor power is the most suitable option, but a cordless angle grinder is good for you if you do not use it regularly.

Angle grinders also consist of spindle nuts and spindle washers to adjust different shapes and sizes of disks. The disk in the tool rotates at an average speed of 12,000 rotations per minute or rpm. However, the average speed of different angle grinders is based on different brands.

How to Use an Angle Grinder Tool?

Before learning how to use an angle grinder, you should first take precautions to safeguard yourself since the tool can be dangerous if used carelessly. Therefore, you need to make sure that you wear a dust mask, gloves, an eye protector, protective boots, and earplugs. Once you are equipped with all the necessary items, read the instruction manual thoroughly to understand how to use your angle grinder since different brands have different functions and should be operated differently. After you are done reading the manual, follow the below steps regarding how to use a angle grinder tool to cut or grind metal, aluminium, wood, and other dense materials:

Step 1: Make your Environment Safe

You need to clear your environment before starting to use an angle grinder to ensure your safety. Make sure that nobody is around you before you start using the angle grinder. If you have somebody around, you need to ensure that the person has taken all the necessary precautions. You also need to keep all the unnecessary stuff aside to do your job properly.

Step 2: Choose Right Disk for your Job

You need to use different disks for different jobs since one disk cannot be used for different tasks. For example, you can use a circular wire brush known as a paint stripper wheel if you want to remove rust or paint from your piece of material. Similarly, you can use a cup brush to clean your piece of metal or any concrete material. Different types of disks are designed for cutting, grinding, or sharpening a material using an angle grinder. Make sure you use a disk that fulfills your purpose. So if you want to slice a metal or a concrete material, you can use a sharp cutting wheel. You can find a variety of disks in many hardware stores where you can choose the most appropriate disk for your angle grinder based on your job.

Step 3: Support Tool Using Both Hands

Hold the handle of your angle grinder with one hand and hold its weight with the other hand. Make sure to hold the handle with your dominant hand to avoid any risks later. Also, if there is a deadman’s switch on your angle grinder, make sure to hold it with your thumb. A deadman’s switch is supposed to be held to make the angle grinder work continually.

Step 4: Let Grinder Fully Speed Up Before you Begin

Once you have switched on the grinder, make sure to wait until your grinder is at full speed before starting your work. After your grinder is at full speed, you can sand, grind, sharpen or cut your material with it. An angle grinder is more effective if you allow it to come to full speed, and if you want to slice a piece of any concrete material, you can effortlessly do it when your grinder is at full speed.

Step 5: Move Grinder Around the Surface of Concrete Material

If you are cleaning or removing rust or paint from your material, you must constantly keep moving your grinder around it to give it a smooth finish. If you are trying to smoothen a particular area, do not hold the grinder in that place for long. Instead, try to move it around the whole surface until you are satisfied with the material.

Step 6: Use Light Pressure When Cutting or Grinding

Do not apply too much pressure when cutting or grinding a piece of material. You need to apply light pressure on the material so that the tool does not yank and lead to injuries. The tool can easily rotate and grind your material by applying light pressure.

Step 7: Pay Attention to Grinder’s Sound

If the grinder’s sound is moderate, it means that it is working properly and if you apply too much pressure to the grinder, it starts emitting a louder sound. Therefore, you need to pay attention to the sound if you are a beginner to keep the pressure moderate.

Step 8: Pay Attention to Spark

The ideal pressure for an industrial angle grinder is 8 to 10 amps. However, it may vary from brand to brand. Too much spark flow indicates that you are applying harder pressure and almost no spark indicates that you are applying way too light pressure. Hence, you need to pay attention to the sparks to control the pressure in your hands.

Step 9: Use Perfect Angle for Attaching the Wheel

If you are going to sand a material, your tool should be positioned at an angle of 5 to 10 degrees from your material’s surface. If you are willing to grind it, the angle should be 15 to 30 degrees.

Step 10: Check if Grinder has Stopped Rotating

If you are done with the job, you need to ensure that the wheel has stopped rotating completely before you put it down. If you keep it down while it rotates, it can cut the things you do not want to cut, or it can also flip back towards you. Therefore, keep it down after it stops spinning. You also need to unplug the tool after using it to avoid any further risks.


Can an angle grinder cut metal?

Yes, not only grinding you can also cut metal using angle grinder.


It will be easier for you to use an angle grinder if you understand and follow all the mentioned steps. You should also read all the instructions provided in the manual thoroughly to familiarize yourself with your angle grinder. You might find it difficult for cutting metal or other material with angle grinder if you are using it for the first time, but you will be able to ace it if you use it a few times.