How to Change an Angle Grinder Blade? (Step-by-Step Guide with Safety Tips)

Your angle grinder is an essential tool for DIY projects around the house. However, the blades used will eventually become worn and need to be replaced. So to keep your projects moving forward, here’s a quick guide on how to change an angle grinder blade.

In this article, we’ll provide a step-by-step guide to changing an angle grinder blade. We’ll also give you some safety tips to consider when replacing blades. Read on to equip yourself with the skills and knowledge you need for a successful DIY project.

When You Need to Change the Angle Grinder Blade?

Your angle grinder cannot achieve the desired results without the right blade. So, when do you need to change your blades?

  • If the blade is visibly worn or damaged,
  • If it’s been a while since you last changed the blades,
  • When your angle grinder starts to vibrate excessively,
  • The metal you’re using is too hard for the existing blade
  • When your angle grinder cannot cut the material

If any of these apply to you, it is time to replace the blade in your angle grinder.

change an angle grinder blade

Step-by-Step Guide on How to Change an Angle Grinder Blade

Now that you know when to replace the angle grinder blade, let’s look at how to remove a grinder blade and replace. 

Here’s a step-by-step guide to help you out:

Safety first 

Before you start, always put your safety first. Wear protective gear, including work gloves, safety glasses, and a dust mask. Unplug the grinder from its power source before you start replacing the blade. This will ensure no accidents occur during the process. You should also check that the blade is compatible with your angle grinder.

Prepare the grinder

Now, get the grinder ready to replace the blade. Unscrew the locking nut and washer on your angle grinder to release the blade from its position. Then, remove and discard the flange, as this part will not be reused. This will expose the blade and make it easier to remove. You can then pull the blade off of its housing.

Change the blade

Next, you can change the angle grinder blade. Ensure the blade is compatible with your power tool and that all safety precautions have been taken. Ensure the correct side of the blade is facing outward. Now secure the blade with a washer and hand-tighten the locking nut. The washer should fit tightly against the blade, while the locking nut should be secure yet easy to remove with a wrench.

Reinstall the new blade

Once you have secured the new blade in place, it’s time to reinstall it. Place the flange on top of your angle grinder and ensure it fits snugly. This will help hold the blade in place to ensure it runs efficiently and safely. You can then reinstall the washer and locking nut to finish the process.

Recommendation for the Corded Hammer Drill

Test the grinder

The last step is to test your newly changed angle grinder blade. Plug in your power tool and turn it on, ensuring all safety measures are in place. Then, test the blade to see if it is working as expected. If you find any issues, you may need to tighten or loosen the locking nut accordingly.

change an angle grinder blade

Safety Tips for Changing Angle Grinder Blade

Besides following the step-by-step process above, there are some additional safety tips to consider when changing the angle grinder blade:

Wear proper protective gear 

To change a blade angle grinder, you should always wear proper protective gear, including safety glasses and work gloves. This will protect your eyes and hands from any potential sparks or debris during the process. Dust masks are also important to filter out any dust particles in the air.

Unplug the grinder before changing the blade

This tip cannot be stressed enough. Always unplug the grinder before you begin installing or changing the blade. This will ensure your safety and protect the motor from any potential damage during the process.

Check if blade is compatible with your angle grinder

Before continuing, check if the new blade is compatible with your angle grinder. This will reduce the risk of any potential accidents or damages to both you and your power tool. You should also check the blade before each use to ensure it is in good condition.

Be careful with the sparks

When replacing your angle grinder blade, you should be careful of any sparks that may occur. These are dangerous and can cause burns or fire if not handled. So be sure to keep a fire extinguisher on hand in emergencies.

Clean the grinder before and after

Finally, don’t forget to clean your instruments before and after you change the blade. This will help keep it in good condition and prevent any unwanted dust from being released into the air.

How Do You Choose the Right Angle Grinder Blade?

Now that you know how to change the blade in an angle grinder, let’s look at how to choose the right one. The type of blade you use will depend on the material and project you are working on. Here are some tips to help you select the perfect blade for your angle grinder:

Choose the right size

The first step is to choose the right blade size for your angle grinder. Measure the diameter of your power tool, and then find a blade that matches. This will ensure it fits securely on the grinder and won’t fall off during use. The blades come in various sizes, such as 4.5-inch, 7-inch, 9-inch, and more. The grinders usually indicate the size of blade you need in their instruction manual.

Consider your material

The type of material you are working with will also determine the kind of blade you need. Different blades are designed for different materials, so select the appropriate one. For example, metal cutting blades can handle hard metals like steel, while abrasive cutting blades are better for softer wood or plastic.

Pay attention to the teeth

The number of teeth on the blade will also make a difference. Blades with fewer teeth are better for faster cuts, while those with more teeth give you more control over your work. So be sure to choose the type that suits your project best.

Safety features

When selecting an angle grinder blade, look for safety features such as anti-kickback teeth and vibration dampeners. These features reduce the risk of accidents or injury while using your power tool.

Quality matters

Finally, don’t forget to check the quality of the blade. Look for blades made from high-quality materials such as tungsten or diamond-coated steel. These blades are designed to last longer and provide better results than regular steel blades.

Knowing how to choose the right angle grinder blade is essential for ensuring the efficiency of your power tool.

change an angle grinder blade

Frequently Asked Questions

How do you change an angle grinder blade without a tool?

Well, you can do it with a little bit of DIY-style elbow grease by gripping the blade firmly and turning it counterclockwise. It’s best to wear protective gear like thick gloves and safety glasses when changing the blade. You never know when a jagged edge may come into contact with your skin.

Do all angle grinder blades fit?

No, not all angle grinder blades are universal. Most angle grinders have specific blade sizes necessary for them to work properly. Check your grinder’s instruction manual for more information about the blade size it requires.

Can I use a 4-inch blade on a 5 inch grinder?

No, this is not recommended. A 4 inch blade will not fit securely on a 5 inch grinder and could cause an accident. If you need to use a 4 inch blade, make sure you have a 4 inch grinder.

Which way do you loosen an angle grinder?

To loosen an angle grinder, turn the locking collar located at the top of the blade counter clockwise. This will release the tension on the blade and allow it to be removed. Make sure to wear thick gloves and safety glasses when attempting this task.

How do you open a grinder screw?

Most grinder screws are designed to open with a standard flathead screwdriver. Gently insert the tip of the screwdriver into the slot on the head of the screw and turn it counter clockwise until it loosens. Once loose, you can remove the screw from its housing.

Do all angle grinders spin clockwise?

No, not all angle grinders spin clockwise. Some grinders require specific blades that rotate counter clockwise. Check your grinder’s instruction manual for more information about the blade type and rotation speed it needs to work properly.


If your angle grinder blade has become blunt or damaged and needs to be changed, you know how. This article on how to change a angle grinder blade has provided you with the steps on how to do this safely and correctly.

Remember always to wear protective eyewear, gloves, and a respirator mask when replacing the blade, so you’ll be sure of your safety. turn off the power switch before installing a new angle grinder blade, as the equipment can cause serious injuries if not handled properly. And finally, make sure to use a compatible replacement blade for your angle grinder. 

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