What Do Angle Grinders Do? A Complete Guide

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Angle grinders are versatile tools that can be used for a variety of tasks, from cutting and grinding to polishing and sanding. What Do Angle Grinders Do? A Complete Guide will provide you with all the information you need to understand the functionalities and applications of angle grinders. According to a report by Market Research Future, the global angle grinders market is expected to grow at a CAGR of 4.6% during the forecast period 2020-2025. This growth is attributed to the increasing demand for power tools in the construction and automotive industries. So, whether you are a DIY enthusiast or a professional, understanding the capabilities of angle grinders is essential. Let’s dive in and explore the world of angle grinders.

An angle grinder, also known as a side grinder or disc grinder, is a handheld power tool used for grinding, cutting, and polishing.

Originally designed for metal workers and construction pros, angle grinders now serve DIY enthusiasts and homeowners. Two main types exist: corded, powered by electricity, and cordless, battery-operated for portability in locations without outlets.

Key Components of an Angle Grinder

An angle grinder consists of several key components:

  • Motor is the heart, usually a high-power electric one. Gear head converts motor power to rotational force. Most have two handles.
  • Disc: This is the part of the grinder that does the actual work. There are different types of discs for different tasks, such as cutting, grinding, and polishing.
  • Guard: This is a protective cover that shields the user from sparks, debris, and the spinning disc.

Common Uses of Angle Grinders

Disc Type Task Material/Application
Cutting Disc Cutting through metal, tiles, concrete Metal, Tiles, Concrete
Grinding Disc Grinding down metal, removing rust, smoothing surfaces Metal, Rust, Surfaces
Polishing Disc Polishing metal, stone, and other materials Metal, Stone, Others
Sanding Disc Sanding wood and other surfaces Wood, Surfaces
Carving Disc Carving wood and other materials Wood, Others
Diamond Disc Carving stone and concrete, cutting tiles Stone, Concrete, Tiles

Angle grinders are incredibly versatile tools that can be used for a wide range of tasks:

  • Cutting: With the right disc, an angle grinder can cut through metal, tiles, concrete, and more.
  • Grinding: This is what angle grinders are best known for.
  • Polishing: With a polishing disc, an angle grinder can be used to polish metal, stone, and other materials to a shiny finish.
  • Sanding: Angle grinders can also be used for sanding wood and other surfaces.
  • Carving: With a carving disc, an angle grinder can be used for carving wood and other materials.

It’s important to note that while angle grinders are incredibly useful, they can also be dangerous if not used properly. Always wear appropriate safety gear, such as goggles, gloves, and ear protection, and make sure to follow the manufacturer’s instructions.

For more information on what an angle grinder is used for, check out this comprehensive guide on homebuilding.co.uk.

Different Applications of Angle Grinders

What Do Angle Grinders Do

Angle grinders are not just for grinding.

  • Cutting Metal: This is one of the most common uses of an angle grinder. With a metal cutting disc, you can easily cut through metal rods, bolts, and bars.
  • Grinding Surfaces: This is particularly useful for preparing surfaces for painting or welding.
  • Sanding Wood: This is a quick and efficient way to remove old paint or varnish from wooden surfaces.
  • Angle grinders are versatile tools: Sharpen lawnmower blades, axes, and chisels. Carve stone and concrete using a diamond disc. Remove mortar with a diamond tuckpointing wheel.

For more detailed information on the applications of angle grinders, check out this article on nortonabrasives.com.

Safety Precautions When Using Angle Grinders

Wood Carving With Angle Grinder

Safety should always be a top priority when using power tools, and angle grinders are no exception. Here are some important safety precautions to keep in mind when using an angle grinder:

  • Wear Protective Gear: This includes safety goggles, gloves, ear protection, and a dust mask.
  • Use the Right Disc: Make sure to use the right disc for the task. For example, don’t use a metal cutting disc to cut tiles.
  • Hold the Grinder Firmly: Hold the grinder with both hands and keep a firm grip at all times.
  • Keep Others at a Safe Distance: Make sure there are no people or pets in the immediate vicinity when using the angle grinder.
  • Don’t Overreach: Keep proper footing and balance at all times. Don’t overreach or use excessive force.

Factors to Consider When Choosing an Angle Grinder

Factor Description
Power Source Electric, pneumatic, or petrol-powered options.
Disc Size Determining depth of cut, range from 4.5″ to 9″.
Speed (RPM) Higher RPM for power, balance with control.
Motor Power Measured in watts or amps, handles tougher tasks.
Adjustable Handle Customize handle position for comfort.
Safety Features Dead-man switch, disc brake for safety.

Choosing the right angle grinder is crucial for the success of your project and your safety. Here are some important factors to consider when choosing an angle grinder:

Power Source:

Angle grinders are available in three main power sources: electric, pneumatic, and petrol.

Electric angle grinders, both corded and cordless, are common. Pneumatic ones, powered by compressed air, are typically lighter and more powerful.

Petrol angle grinders are the most powerful and are suitable for heavy-duty applications.

Disc Size:

The size of the disc determines the depth of cut the grinder can make. Common disc sizes range from 4.5 inches to 9 inches. Larger discs are more powerful and suitable for heavy-duty tasks, while smaller discs are more suitable for precision work.


Higher RPM means the tool is more powerful, but it also means it is harder to control. Make sure to choose an angle grinder with a speed that is suitable for the task at hand.

Motor Power:

More powerful motors allow the grinder to handle tougher materials and larger discs.

Adjustable Handle:

An adjustable handle allows you to change the position of the handle to make the grinder more comfortable to use.

Safety Features:

Seek safety features like a dead-man switch, requiring continuous pressure for operation, and a disc brake for quick stopping when power is off.

For more detailed information on choosing the right angle grinder, check out this article on protoolreviews.com.

Safety Gear And Angle Grinder Accessories

Maintenance and Care of Angle Grinders

Proper maintenance and care of your angle grinder will ensure its longevity and optimal performance. Here are some tips and guidelines for maintaining and caring for your angle grinder:

  • After using the angle grinder, clean it thoroughly to remove dust and debris. Pay special attention to the air vents and the motor.
  •  Regularly lubricate the moving parts of the angle grinder as per the manufacturer’s instructions.
  • Store the angle grinder in a dry and clean place.

Frequently Asked Questions

What are the common uses of angle grinders?

They are commonly used for:

  • Cutting metal, tiles, and concrete.
  • Grinding and polishing surfaces.
  • Removing rust and loose paint.
  • Sanding wood and other materials.

Can angle grinders be used for woodwork?

Yes, angle grinders can be used for woodwork.

What are the different types of discs used in angle grinders?

There are several types of discs used in angle grinders:

  • Cutting Discs: Used for cutting metal, concrete, and tiles.
  • Grinding Discs: Used for grinding and removing material from surfaces.
  • Flap Discs: Used for sanding and polishing surfaces.
  • Diamond Discs: Used for cutting and grinding hard materials like concrete and stone.

What safety precautions should be taken when using angle grinders?

When using angle grinders, it is important to:

  • Secure the workpiece properly.
  • Use the correct disc for the task.

How to maintain an angle grinder?

To maintain an angle grinder:

  • Regularly check for any damages or loose parts.
  • Clean the grinder after each use to remove dust and debris.
  • Lubricate the moving parts as per the manufacturer’s instructions.
  • Store the grinder in a dry and clean place.


What Do Angle Grinders Do? A Complete Guide has provided you with all the necessary information to use angle grinders safely and effectively. Additinally always take the necessary safety precautions and maintain your tool properly to ensure its longevity and optimal performance.

Thank you for reading!