Are you planning to cut bricks for your next DIY project? If so, you’ll need the right tool for the job.
An angle grinder can be a great option, but what size should you use? With so many different sizes available, it can be tough to know which one is right for your needs.
In this article, we’ll explore the different sizes of angle grinders and how they can be used to cut bricks. Whether you’re a seasoned DIYer or just starting out, this guide will help you choose the right size angle grinder for your brick-cutting needs.
So, let’s get started!
What Size Angle Grinder To Cut Bricks
When it comes to cutting bricks with an angle grinder, the size of the grinder is an important factor to consider. The size of the grinder will determine how deep you can cut into the brick material in one pass.
For instance, a 4-inch or 6-inch angle grinder can be used to cut small-sized bricks, while a 9-inch angle grinder is better suited for larger brick sizes. The depth of the cut will also depend on the thickness of the brick material and the size of the diamond blade being used.
If you need to cut through the brick in one pass, it’s important to choose an angle grinder that is large enough for the job. A 4-1/2-inch diameter blade can cut approximately 2-1/4 inches deep, while a 9-inch grinder can cut to depths of approximately 4-1/2 inches.
It’s worth noting that brick sizes can vary depending on the type and style you are using. The average range is between 1-5/8-inch through 2-3/4-inch thick, with some specialty bricks even thicker. This means that the size of your angle grinder is important if you need to cut through the brick in one pass.
If you cannot cut all the way through the brick, you must score the material as deeply as possible on one side with the angle grinder, slide the brick to the edge of your work surface, and finish the cut by lightly tapping the top of the waste side of the brick with a hammer to snap it off. A quick pass with the angle grinder (this time held so that its blade is near parallel with the brick’s cut side in order to shave) will clean up any rough edges.
Understanding Angle Grinder Sizes
Angle grinder sizes are determined by the diameter of the cutting/abrasive disc. The most common sizes available in the market are 4-inch, 4-1/2-inch, 5-inch, 6-inch, 7-inch, and 9-inch. When choosing an angle grinder size for cutting bricks, it’s important to consider the size of the brick and the depth of cut required.
Smaller angle grinders, such as the 4-1/2-inch and 5-inch models, are suitable for cutting small-sized bricks. These grinders can cut to a depth of approximately 2-1/4 inches with a 4-1/2-inch blade. However, for larger brick sizes, a 9-inch angle grinder is more appropriate. A 9-inch grinder can cut to depths of approximately 4-1/2 inches.
It’s important to note that smaller angle grinders have a higher RPM and smaller discs, which makes them more prone to wearing down rapidly. On the other hand, larger angle grinders with bigger discs are well suited for heavy-duty applications.
When working with an angle grinder to cut bricks, it’s essential to ensure that the tool has an adjustable speed as sanding usually requires a low RPM between 600 and 1000. Additionally, it’s worth bearing in mind that diamond cutting discs are superior to abrasive cutting discs in terms of making a much cleaner and faster cut. They also last far longer than abrasive discs.
Factors To Consider When Choosing The Right Size Angle Grinder
When choosing the right size angle grinder to cut bricks, there are several factors to consider. The first factor is the size of the brick you are cutting. As mentioned earlier, smaller bricks can be cut with a 4-inch or 6-inch angle grinder, while larger bricks require a 9-inch angle grinder.
Another factor to consider is the depth of the cut you need to make. If you need to cut through the brick in one pass, it’s important to choose an angle grinder that is large enough for the job. A 4-1/2-inch diameter blade can cut approximately 2-1/4 inches deep, while a 9-inch grinder can cut to depths of approximately 4-1/2 inches.
The thickness of the diamond blade being used is also an important consideration. A thicker blade will allow for deeper cuts and may be necessary for cutting through thicker or denser brick materials.
The power source of the angle grinder is another factor to consider. Electric angle grinders are the most common and widely available, but petrol engine or compressed air-powered grinders may be necessary for certain applications.
Finally, it’s important to consider your own level of experience and comfort with using an angle grinder. Smaller grinders may be easier to control for beginners or those with less experience, while larger grinders may require more skill and experience to handle safely and effectively.
Tips For Cutting Bricks With An Angle Grinder
Cutting bricks with an angle grinder can be a daunting task, but with the right technique and tools, it can be done easily and efficiently. Here are some tips to help you get the most out of your angle grinder when cutting bricks:
1. Choose the right size angle grinder: As mentioned earlier, the size of the angle grinder is crucial when it comes to cutting bricks. Make sure to choose an angle grinder that matches the size of the brick you are working with.
2. Use a diamond masonry blade: Diamond blades are specifically designed for cutting through hard materials like bricks. Make sure to use a diamond masonry blade to ensure clean and precise cuts.
3. Wear protective gear: Always wear protective gear such as safety glasses, a dust mask, and leather gloves when cutting bricks with an angle grinder. This will protect you from flying debris and dust.
4. Cut on the waste side: When cutting along the marked line on the brick, make sure to cut on the waste side of the pencil line. This will provide a little leeway until you gain the feel of the tool and cutting process.
5. Apply minimal pressure: The blade on your angle grinder should be fast and powerful enough to make the cut without applying too much pressure. Apply only a small amount of pressure to ensure that the disc penetrates the brick, and let the angle grinder do most of the work.
6. Smooth out uneven surfaces: After making the cut, use the angle grinder to smooth out any uneven surfaces where you made the cut.
By following these tips, you can ensure that your brick cutting project goes smoothly and efficiently with an angle grinder.
Safety Precautions When Using An Angle Grinder To Cut Bricks
Before using an angle grinder to cut bricks, it is important to take certain safety precautions. The following are some essential safety measures to follow:
1. Wear proper safety gear: Always wear eye protection, dust mask or respirator, gloves, and earplugs or headphones when using an angle grinder to cut bricks. This will protect you from dust, debris, and noise.
2. Check the grinder: Before using the angle grinder, check the condition of the tool and make sure it is in good working order. Inspect the power cord for any damage or fraying, and ensure that the blade is securely attached.
3. Secure the workpiece: Make sure that the brick you are cutting is securely clamped or held in place before you start cutting. This will prevent it from moving or shifting during the cutting process.
4. Choose the right blade: Select a diamond blade that is appropriate for cutting bricks. The blade should be the correct size for your angle grinder and capable of cutting through the thickness of the brick.
5. Avoid overheating: To prevent overheating of the blade, make sure to remove it from the brick every 30 seconds or so during the cutting process.
6. Keep the grinder moving: When cutting with an angle grinder, keep the tool moving in a steady back-and-forth motion. This will help prevent overheating and ensure a clean cut.
7. Watch out for debris: As you cut through the brick, debris and dust will be generated. Be aware of this and take steps to protect yourself and others from flying debris.
By following these safety precautions, you can safely use an angle grinder to cut bricks without risking injury or damage to your equipment. Remember to always prioritize safety when working with power tools.
Alternative Tools For Cutting Bricks
While an angle grinder can be used to cut bricks, there are several alternative tools that may work faster and better. One of the most common ways to cut bricks is to use a brick chisel and a hammer. A brick chisel features a sharp and durable edge that is wide enough to cut through a whole brick at once. All you have to do is hold the chisel on the brick and hit it with a hammer. This should split the brick right in half.
Another way to cut bricks is to use any type of circular saw, such as a handheld circular saw, a table saw, a miter saw, or even a concrete saw if need be. If using a circular saw, it’s important to use the right kind of blade. Specifically, a diamond masonry blade is what you need for this task.
Petrol-engined power saws can also be used to cut paving materials, with 230mm or 300mm blades being best suited for the job. The smaller diameter blades used on angle grinders are not really suitable for cutting bricks.
If you have a lot of cutting work to do, it’s recommended to hire a saw for just one day and do all the cutting in one session. It’s important to tell the hire centre exactly what type of material you will be cutting as there are different blades for different materials.