How to grinding wood with flap disc? - Binic Abrasive (2023)

Grinding Wood

Grinding wood typically refers to the process of using a grinding machine or other tool to remove material from a piece of wood. Here are a few reasons why wood might be ground:

  • Smoothing: When wood is cut with a saw or other cutting tool, the surface can be rough and uneven. Grinding the wood with a sanding machine or other grinding tool can help to smooth the surface, making it more even and uniform.
  • Shaping: Grinding wood can also be used to shape it into a specific form. For example, a carpenter may use a grinding tool to shape a piece of wood into a rounded edge or to create a specific design or pattern.
  • Removing material: Sometimes, it is necessary to remove material from wood in order to create a desired shape or form. Grinding is one way to remove material quickly and efficiently.
  • Preparation for finishing: Grinding wood can also prepare the surface for finishing. By smoothing and evening out the surface, it can be easier to apply paint, varnish, or other finishes to the wood.Overall, grinding wood is a useful process for shaping, smoothing, and preparing wood for a variety of different applications.

The role offlap disc for grinding wood

How to grinding wood with flap disc? - Binic Abrasive (1)

Wood grinding can be a challenging and time-consuming task, especially if you don’t have the right tools for the job. Flap discs are one of the most versatile and effective tools for grinding wood. Now, we will explore what flap discs are, why choose them, how they work, and the steps you can take to grind wood effectively using a flap disc.

1.What are flap discs?

Flap discs are abrasive tools that are made up of overlapping flaps of abrasive material, usually aluminum oxide or zirconia alumina, that are adhered to a central hub. They can come in a variety of shapes and sizes, ranging from small 2-inch discs to large 7-inch discs, and can be used on a variety of materials, including metal, plastic, and wood.

Flap discs are unique in that they can be used for both grinding and finishing tasks. The abrasive flaps of the disc are designed to wear down gradually as they come into contact with the workpiece, which helps to prevent gouging or scratching the surface being ground. The result is a smooth and even finish that requires minimal additional work to achieve.

2.Whychooseflap discsforgrinding wood?

Versatility: Flap discs come in a variety of grits and sizes, which makes them suitable for a range of wood grinding applications. They can be used for heavy material removal, as well as for smoothing and finishing surfaces.

Smooth finish: Flap discs are designed to produce a smoother finish than other grinding tools like sanding discs or grinding wheels. The overlapping flaps of abrasive material conform to the surface being ground, which helps to prevent gouging or scratching.

Long-lasting: Flap discs are durable and long-lasting, which means they can be used for extended periods of time without needing to be replaced. This can be especially beneficial for woodworkers who are grinding large pieces of wood.

Reduced clogging: Flap discs are less likely to clog with sawdust or other wood particles than other types of grinding tools. This is because the flaps are designed to shed material as they wear down, which helps to prevent the abrasive material from becoming clogged.

3.How to Use a Flap Disc for Wood Grinding?

Grinding wood with a flap disc requires some preparation and the right technique. Here are the steps you can follow to grind wood effectively using a flap disc:

Step 1: Safety Precautions

Before beginning the process of grinding wood with flap discs, it is important to take the necessary safety precautions to avoid injury. Here are some key safety precautions to keep in mind:

Wear protective gear: When grinding wood, it is important to wear eye protection and a dust mask to prevent eye injuries and inhalation of wood dust.

Keep a clean workspace: Make sure your workspace is clean and free of clutter to reduce the risk of accidents.

Use the right tool for the job: Make sure you are using the right flap disc for the type of wood you are working with and the type of grinding you need to do.

Step 2: Choosing the RightFlap Disc

The first step in grinding wood with flap discs is to choose the right disc for the job. Here are some factors to consider when choosing a flap disc for wood grinding:

  • Grit Size: Flap discs come in different grit sizes, which determine how coarse or fine the abrasive material is. For wood grinding, it is recommended to use a flap disc with a lower grit size, such as 40 or 60, which will remove material quickly without damaging the wood surface.
  • Abrasive Material: Flap discs come with different types of abrasive materials, including ceramic, zirconia, and aluminum oxide. For wood grinding, it is recommended to use a flap disc with a softer abrasive material, such as aluminum oxide, which will remove material quickly without leaving deep scratches on the wood surface.Aluminum oxideflap discis a recommened..
  • Disc Size: Flap discs come in different sizes, ranging from 4 inches to 7 inches in diameter. The size of the flap disc you choose will depend on the size of the wood surface you are grinding.
  • Flap Density: The density of the flaps on a flap disc can affect its performance. A flap disc with a high flap density will provide more aggressive grinding, but it may also clog more quickly. For wood grinding, a flap disc with a medium flap density is recommended.
  • Backing Material: Flap discs come with different types of backing material, including fiberglass and plastic. For wood grinding, it is recommended to use a flap disc with a fiberglass backing, as it is more durable and can withstand the high speeds required for wood grinding.
  • Brand and Quality: It is important to choose a reputable brand of flap disc for wood grinding, as the quality of the flap disc can affect its performance and durability. Look for flap discs that are designed specifically for wood grinding and that have good customer reviews.

Step 3: Prepare the Wood Surface

Before grinding, prepare the wood surface by removing any rough spots, splinters, or imperfections. Use a belt sander or sanding block to smooth the surface, starting with a coarse grit sandpaper and gradually moving to a finer grit. This will make the grinding process easier and help to achieve a smoother finish.

Step 4: Grinding the Wood

Whenuse flap discs to grind wood, it is important to follow the proper technique to avoid damaging the wood or causing injury to yourself. Here are the steps to follow:

Hold the flap disc at a slight angle to the wood surface, with the disc rotating away from you. This will help to prevent gouging or scratching of the wood.

Use a light touch and move the flap disc in a back-and-forth motion across the wood surface. Avoid pressing too hard or staying in one spot for too long, as this can create uneven grinding and damage the wood.

Keep the flap disc moving at all times and use a consistent speed to achieve a smooth finish. Be patient and take your time to ensure that the entire surface is evenly ground.

As you grind, periodically check the wood surface to ensure that you are achieving the desired finish. If necessary, switch to a finer grit flap disc to achieve a smoother finish.

How to grinding wood with flap disc? - Binic Abrasive (5)

Step 5: Finishing the Wood

Once the grinding is complete, it is important to remove any dust or debris from the wood surface. Use a soft-bristled brush or compressed air to remove any loose sawdust or debris. Then, apply a finish to the wood surface to protect it and enhance its appearance. This could be a stain, wax, varnish, or other finish of your choice.


Grinding wood with flap discscan be an effective way to remove material and achieve a smooth, even finish on wooden surfaces. By following the proper technique and using the right flap disc for the job, you can achieve a professional-looking result that enhances the natural beauty of the wood. Remember to always take the necessary safety precautions and to work in a clean, clutter-free workspace to avoid accidents or injury. With practice and patience, you can become proficient at grinding wood with flap discs and achieve stunning results on yourwoodworking projectswith flap disc.

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Can you use a grinder flap disc on wood? ›

Flap discs can also be used across various surfaces, including aluminum, wood, concrete, engineered stone, granite and more. For each of these applications, whether you're grinding or finishing, make sure you choose the right flap disc.

Can you grind with flap disc? ›

Flap discs offer benefits such as fast stock removal and the ability to grind, blend, and finish with a single product, which can improve project timeline without compromising on results.

Should I use flap wheel or grinding disc? ›

Flap discs are ideal for grinding, blending, finishing, and polishing surfaces, as well as removing rust, paint, and weld seams. Grinding discs are typically used for heavy-duty material removal, such as removing large welds, and shaping and smoothing metal edges.

What grit is a flap disc? ›

The abrasive grains for flap discs typically range from about 36 to 120, with smaller numbers indicating larger, coarser grit and larger numbers indicating smaller, finer grit.

What is the difference between a flap wheel and a flap disc? ›

Flap Discs, which allow you to see through the wheel while it is in use. (V.S.R. stands for Visible Stock Removal.) Flap wheels are similar to flap discs in that they shape metal, but flap wheels are designed to allow you to grind and finish hard-to-access areas such as the inside of pipes or tubes.

What is a 40 grit flap disc used for? ›

The flap disc is engineered to allow you to remove stock quickly from both steel and stainless steel. It can also be used for other applications such as sanding, deburring, removing rust and paint, as well as cleaning and grinding.

What is the difference between flap disc and cutting disc? ›

While flap discs, are formed by several abrasive fabrics depending on the application, and their center is usually depressed when it is going to be used for roughing, although they also exist with a flat center. However, the cutting discs have a smaller grain size, and a less concave or even flat center.

What kind of flap disc for wood? ›

Did you know that ceramic flap discs are excellent on woods? If you are a regular flap disc user you will know that the Cibo Ceramic Flap Discs are fantastic when grinding stainless steel, steel and other hard metals but they are also excellent on a variety of woods.

What is the use of abrasive flap wheel? ›

Flap wheels are used to grind and finish hard-to-reach areas of metal or plastic pipes and tubes. Coated abrasive wheels are made up of multiple abrasive sheets connected to a core. Flap wheels are used for different metalworking applications including fabrication, deburring, cleaning, polishing, and finishing.

What is the use of flap grinding wheel? ›

When you think of abrasives for sanding, you probably envision a standard grinding or sanding disc. However, if you're working with metals, you may need to use a flap disc or flap wheel instead. These discs shape metal and are used most often in welding, agriculture, food production, and industrial maintenance.

Can you use a metal grinding disc on wood? ›

Do Certain Tasks Require Different Circular Saw Blades? In the simplest terms, yes. Although it is possible to use a metal carving disc for wood cutting, professionals would strongly advise against this due to the potential hazard associated with the kickback.

Is it OK to use an angle grinder on wood? ›

Angle grinders are fitted with abrasive wheels, not blades. These wheels operate by abrading the material they come into contact with. These wheels are not suitable for cutting wood: they have no teeth. Rather they are used to remove grout between bricks, smooth surfaces, and shorten bolts, amongst other purposes.

Is it safe to use an angle grinder on wood? ›

The blade of an angle grinder is a grindstone that is used to polish or sharpen metal and stone; it cannot be used for cut- ting wood because it may burn and singe the wood by friction.


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