OEM For Abrasive Tools
Abrasive includes sanding belt, flap disc, cutting wheel, flexible flap disc and other products. The main purpose is to polish steel workpieces, remove rust, polish the welding points, make the surface smooth, more beautiful, cut steel and so on.
Our company is a high-tech enterprise that independently designs, develops, produces, and sells automatic abrasive flap disc production lines.
Variety of Products
We can provide a variety of abrasive equipment, including semi-automatic flap disc machines, fully automatic flap disc machines, fully automatic flexible flap disc machines, automatic abrasive slitting machines, etc. We can also provide flap disc raw materials such as glue and backing.
Rich Production Experience
With over 10 years of experience working with abrasive manufacturers large and small, we can specify, design, source and install the perfect machine for almost any application. No matter what kind of flap disc/ wheel forming, cutting and grinding wheel & packaging machinery, we can manufacture it based on our rich experience.
Strict Quality Standards
All suppliers of raw materials and purchased parts are jointly screened and regularly evaluated by the procurement, technology, and quality control departments to ensure that the raw materials are qualified. Our quality management is a combination of comprehensive employee participation and full value chain quality management from customers to suppliers.
Recognized by Many Parties
Well-known brands Saint-Gobain, 3M, Abrasive and Pferd choose our abrasive equipment to produce flap discs or wheels, cutting and grinding wheels. At the same time, our abrasives have passed CE standard certification.
Abrasive grains are central to a wide range of precision and industrial finishing applications, but they are not a one-size-fits-all solution. They can be sub-divided by material type, grain size, application, and more. However, the two most common platforms for abrasive applications are coated & bonded abrasives. The key difference between bonded and coated abrasives is the technique employed to join the material to the product. Coated abrasives adhere a layer of abrasive material to the outside surface of the product whereas bonded abrasives are formed by the fusion of abrasive grains and the binder itself. Examples of coated abrasives are discs, sheets, rolls, and belts while bonded abrasives comprise grinding wheels, polishing wheels, diamond wheels, cones, and segments.
Coated Abrasive
1.Characteristics of Coated Abrasive
Coated abrasives are grains applied over a surface, commonly in the form of belts, sheets, discs, and rolls where the grain is attached via a binder to the backing, then another layer of binder additionally supports the grains. Sandpaper is perhaps the most common type of coated abrasive. Widely used substrates are paper, cloth, vulcanized fiber, and plastic films which are available in grit sizes ranging from very coarse (~24 mesh ) to ultrafine (micron sizes). The international standard for coated abrasives is ISO 6344. Coated abrasives can utilize abrasive grains with high-performance properties and excellent uniformity. Ceramic grains are also self-sharpening to prolong life and can be used on materials that are difficult to grind or finish.
2.Components of Coated Abrasives
①Abrasive Grains
Coated abrasives are developed using abrasive grains. The foremost common abrasive grains are alumina, zirconium, ceramic, carbide, and garnet. The grains are crushed and separated into sizes that are grit sizes, using calibrated screens. Grit size ranges from 12 (very coarse) to 1200 (very fine). Once the grains are separated into sizes, they're attached to a backing material using various bond techniques. Below are descriptions of the foremost common abrasive grains:
*Ceramic:It is a high performance, man-made abrasive, which is a very uniform, high-density grain structure. Ceramic is extremely durable and self-sharpening for extended life and a more relaxed cut. Excels on tough to grind materials.
*Aluminum Oxide:It is a challenging, blocky shaped, man-made grain used for top speed grinding and finishing metals, wood, and other high-lasting materials without excessive fracturing or shedding. The power to resist fracturing is that the primary consideration, alumina, will outperform all other coated abrasive grains.
*Zirconium:Zirconium is an excellent, dense, man-made crystalline grain used for aggressive stock removal. Zirconium may be a very thick material with a singular self-sharpening characteristic, which provides its long life on massive stock removal operations.
*Silicon Carbide:It is a rigid, very sharp, man-made abrasive fitted to non-ferrous materials and non-metallic materials like concrete, marble, and glass. A friable grain, carbide cuts faster under light pressure than the other grain utilized in coated abrasives.
*Garnet:Garnet is formed of natural alumina, which may be a relatively strong but fragile bonding structure. It is very inconsistent in comparison to synthetics. It's used primarily in woodworking as garnet dulls too quickly to be utilized in metalworking.
②Backing Materials (Substrates)
Below are the four major types of backing materials:
*Paper:Specialized technical papers are used as substrates for coated abrasives. They are identified by letters representing weight and flexibility: “A” and “B” weights are light weight and highly flexible. “C”, “D”, “E”, “F” weights are medium to heavy weight for more strength and less flexibility.
*Cloth:Cloth backings are more durable than paper backings. There are several types of cloth backings: cotton (ie: Egyptian), polyester and polyester-cotton blends. Cloth backings are identified by weight and flexibility: “F” weight (J-Flex) is light and highly flexible. This lighter weight is suitable for cleaning, finishing, and polishing. “J” weight (Jeans) is highly flexible and suitable for cleaning, finishing, and polishing of contour surfaces. “X” weight (Drills) is medium to heavy weight for more strength and durability. It has low flexibility suitable for grinding, deburring and finishing. “H” (Heavy Duty) is a heavier weight than “X” weight. It has low flexibility and is suitable for heavy duty grinding and deburring applications. Excellent edge stability.
*Fiber:Fiber backing is a tough vulcanized material made from rag stock. This backing is usually used for abrasive fiber discs.
*Combination:Combination backing is laminated paper and cloth, and is very sturdy and shock resistant. Combination backings typically are used for a wide range of grits and mounting techniques.
*Other Backing Materials:There are also a variety of other substrates such as nylon fiber or screens that can be coated for special applications. Non-woven nylon impregnated with abrasive grain is another substrate that can be used for cleaning, polishing, or blending.
3.Types of Coated Abrasive
There are various types of coated abrasives available for your product finishing and polishing. It includes a large variety of rolls, discs, flap wheels, and belts. The option that you make should always be based on your needs. Below are some of the standard options that you will find for coated abrasives:
*Cartridge Rolls:Cartridge rolls are abrasive coated rolls that are suitable for sanding and finishing spaces that are difficult to access. The cartridge rolls are used on inside surfaces and inside corners where other abrasives can not hit high-speed grinders. Cartridge rolls have an aluminum oxide-coated material that can provide a versatile method of hand sanding, especially in metalwork.
*Cross Pads:Cross pads are used for small channel polishing, end deburring, and workpiece finishing. The Cross Pads provide greater flexibility and make it easier for users to see through the contact region. These cross pads are perfect for fast grinding on channels, corners, or spotting on flat surfaces.
*Deburring Wheels:Deburring wheels are used to wash, blend, deburring, finish, and polish metals and glass. For light to heavy precision mixing, deburring, and washing, these deburring wheels are ideal. Deburring wheels provide uniform finishing to components and quickly and easily deburr the workpiece than hand finishing.
*Flap Discs:With a product that can grind and finish in one single action, flap discs offer precise angle grinding flexibility. Flap Disc is ideal for most ferrous & non-ferrous materials for sanding and finishing of welds, deburring, rust reduction, and snagging.
*Flap Wheels:For most applications, from grinding to polishing, Flap Wheels are used. These flap wheels are usually used on ferrous alloy, high tensile materials, and a workpiece to finish complex shapes and tight contours. The versatility of the wheel helps the wheels to navigate places that are hard to reach. On grinders, drills, impact wrenches, or handheld rotary tools, flap wheels connect.
*Sanding Belts:Sanding Belts are used for deburring, grinding, blending, finishing, and polishing. These belts are back with cloth, paper, or film.
*Surface Conditioning Discs:Surface Conditioning Discs come in an all-inclusive range of grades and sizes and are an ideal first-step for washing, mixing, deburring, and finishing.
4.Advantages of Coated Abrasive
Coated abrasives have the same advantages as bonded abrasives in that they perform remarkably well when used as instructed. When utilizing one for basic tasks, even beginners can pick it up quickly. The same restrictions apply to coated abrasives as to bonded abrasives. Furthermore, the operator benefits instantly from specialty-coated abrasives. For instance, a coated abrasive product will last longer if it has an additional coat to assist in preventing wear and tear. This results in material savings for the operator. The same holds for specific abrasives that stop the accumulation of stearate.
5.Uses of Coated Abrasive
There are many grit sizes for abrasives. Their grit size determines the abrasives' ideal function. For stock removal, for instance, greater grit grits (24 to 60) work best. For deburring, larger grit grits work best as well. Applications such as surface preparation, mixing, and graining call for grits between 80 and 220. Ultra-fine grits, which come in sizes between 280 and 3000, are used as a pre-polish smoothing agent or on smooth surfaces.
Bonded Abrasive
1.Characteristics of Bonded Abrasive
Bonded abrasives are abrasives in which the grains are bonded together to create a solid form which often takes the shape of a wheel. Bonded abrasives use a binding agent or resin in order to reinforce the grinding surface while cutting. The performance of an abrasive is determined by the type of grain, spacing, and bond material. Bonded abrasives are the product of choice for industrial grinding and finishing of hard materials like metal and ceramic alloys. The nature of your workpiece is the first thing to consider when selecting an abrasive system. Standard material finishing requirements may be satisfied by commodity alumina (Al2O3), but the surface quality finish often leaves much to be desired. This is usually symptomatic of poor bulk particle properties such asbroad particle size distributions (PSDs) and/or coarse grit sizes. It may also come down to chemistry, microstructure, or various other phenomena.
2.Components of Bonded Abrasive
①Abrasive Grain
Abrasive grains occasionally referred to as grit, are particles of man-made compounds. The chemical structure of the grains regulates the physical properties such as the shape and perceptiveness of each particle along with its hardness & friability which is the propensity to break down. The Common grain types used in making bonded abrasives include:
*Aluminum Oxide: A very tough blocky shaped grain used for cutting metals and other higher tensile strength materials without extreme fracturing
*Silicon Carbide: A very harder and very sharp abrasive suited for non-metallic resources such as concrete
*Zirconium: A very finer, dense crystalline grain that can be used for rocky stock removal
*Ceramic: An exclusive ceramic aluminum oxide that is much tougher than standard aluminum oxide
②Bonding Agent
The bonding agent that holds the grains collected determines the fill resistance of the wheel.
③Reinforcement
The reinforcement material offers strength to operate the abrasive product at the noticeable maximum RPMs and to withstand adjacent pressure that is applied during use. This serious element determines the physical strength of the product.
④Combining the Mechanisms
During the manufacturing procedure, these components are combined to form a bonded abrasive tool. The grains & bonding agents are measured, joined, and then pressed in an automatic hydraulic press.
3.Types of Bonded Abrasive
Here are some common types of bonded abrasives:
*Grinding Wheels:These are among the most common bonded abrasives and are used for tasks like removing material from a workpiece, sharpening tools, and achieving fine surface finishes. They are often used in metalworking, woodworking, and other industries.
*Cut-off Wheels:Also known as cutting discs or wheels, these abrasives are designed for cutting through metal, concrete, or other materials. They are commonly used in metal fabrication and construction.
*Sharpening Stones:These are used for sharpening the edges of cutting tools such as knives, chisels, and scissors. They come in various grits for different levels of sharpness.
*Mounted Points:These are small abrasive tools mounted on a spindle for precise grinding, deburring, and finishing tasks. They are often used in precision machining and mold-making.
*Honing Stones:Honing stones are used for achieving a high-precision surface finish and sizing in cylindrical bores. They are commonly employed in engine manufacturing and other applications that require precise internal machining.
*Grinding Segments:These are large blocks of abrasive material used in the surface grinding of steel and other metals. They can be used on vertical or horizontal grinding machines.
*Diamond and CBN Wheels:These wheels use diamond or cubic boron nitride (CBN) abrasive grains for cutting and grinding applications, particularly when high precision and durability are required. They are often used in tool and cutter grinding, precision grinding, and hard material machining.
4.Advantages of Bonded Abrasive
Bonded abrasives are engineered and designed to perform exceptionally effectively with particular tools. You may experience problems, like the bonded abrasive backing falling apart, if you attempt to use a bonded abrasive on tools designed for coated abrasives. Nonetheless, bonded abrasives have very few disadvantages when used as intended. Regarding limits, bonded abrasives are typically not very successful at prep work, especially final prep work prior to a finish being applied, aside from equipment that is expressly intended for these types of abrasives. Furthermore, a lot of bonded abrasive items are not shaped in a way that allows them to cover an object completely. Most bonded abrasive materials have a hard surface that prevents them from getting into objects with bends or dips.
5.Uses of Bonded Abrasive
Bonded abrasives can be utilized for many different grinding applications, such as cut-off wheels, snagging wheels, mounted wheels, segments, plugs, and cones, and have a wide range of applications, with different bonding agents offering different functions. Bonding abrasives are frequently used in heavy industry. This is because applications in which the removal of heavy stock removal on stainless and high alloy steels benefit from the addition of their aggressive cutting action, which can be greatly enhanced via the utilization of alumina-zirconia abrasive grain. Bonded abrasives are also used in track grinding as rail surfacing greatly benefits from the rapid cutting action which enables a faster return to operation. Additionally, they can be used in foundry applications as their durability is able to withstand the severe environment of metal foundries.
Coated & Bonded Abrasive: Manufacturing Method
How Coated Abrasives are Made
A coated abrasive backing can be any material that is flexible and will take adhesive. That includes paper, vulcanized rubber, film, cotton, or polyester cloth. Using the backing as the base, abrasive is to the base. A base coat of adhesive, usually resin, is applied to the backing. Once that has set (but not dried,) an abrasive product, or grain, is applied to the base coat electrostatically. The electrostatic method is used to ensure a wide and even spread of abrasive across the backing and that the grain (abrasive) is facing the proper direction. Once the adhesive has dried, the abrasives get affixed to the backing, the resin coat gets applied over the abrasives. Dried resin locks the abrasives in place and provides some protection against wear and tear.
How Bonded Abrasives are Made
To help bond the raw materials, several different ingredients can be used as stand-alone bonding agents and in combination with other bonding agents. Those most commonly used bonding materials include:Resin, Rubber, Glue. There are several grains available for bonded abrasives. Those include: cBN, Silicon Carbide, Diamonds, Ceramics, Aluminum Oxide, Zirconia, Combinations of grain materials. In some cases, specialty abrasive formulations address specific challenges, such as grinding wheels for aluminum. A backing sheet has adhesive applied to it, and then the grain is added. Once the adhesive sets, the abrasive sheets get cut into different sizes, shapes, and applications. The new product is used in multiple applications to help finish various workpieces.
Choose the Right Abrasive
Abrasives seem simple enough, right? But there are many on the market for various purposes and industries. Some might could say there are so many, it makes choosing the right abrasive hard! Let’s start with why you need an abrasive. You could be removing materials, finishing (such as polish or smooth), cleaning, sharpening, or deburring.
Types of Abrasives and Why You Need Them
Each type of abrasive has its unique properties, advantages, and disadvantages. The choice of abrasive depends on factors such as the workpiece material and the operation being performed. Here are the different types of abrasives commonly used:
●Bonded abrasives are made up of abrasive grains that are bonded together with various materials like resin, rubber, or ceramic. Some examples of bonded abrasives include grinding wheels, honing stones, and mounted points.
●Coated abrasives consist of a backing material (such as cloth, paper, or film) coated with abrasive grains. Examples of coated abrasives include sandpaper, abrasive belts, and discs.
●Non-woven abrasives are made up of abrasive grains that are bonded to a non-woven fabric. They are commonly used for polishing and surface finishing applications.
●Superabrasives are synthetic or natural abrasive materials that are used for high-precision grinding, cutting, and drilling applications. Some examples of superabrasives include diamond and cubic boron nitride (CBN).
●Loose abrasives are abrasive particles that are not bonded to any backing material. They are used for lapping, polishing, and other high-precision finishing operations.
●Abrasive powders are fine abrasive grains that are used for various applications such as polishing, deburring, and cleaning. Examples of abrasive powders include aluminum oxide, silicon carbide, and diamond powder.
Applications for Abrasives
The material you’re using your abrasive on also figures into the equation of which abrasive you should use.
●Wood
The best abrasive for woodwork depends on the specific task and the type of wood being worked on. You can use them on hardwoods and softwoods in different grits and sizes. First, there’s the coated abrasive (sandpaper); it’s commonly used for woodwork. It’s available in various grits, ranging from coarse to fine, and can be used for tasks such as sanding raw wood, removing paint or varnish, and preparing surfaces for finishing. Discs are made up of multiple overlapping flaps of abrasive material and are commonly used for sanding and finishing wood surfaces. They are available in different grits and are ideal for shaping and smoothing contours and curves. Abrasive belts are commonly used for sanding flat or slightly curved wood surfaces. They are available in various grits and can be used with handheld sanders or stationary sanders. Sponges are a flexible and versatile abrasive material that can be used for sanding and finishing curved or irregularly shaped wood surfaces. This is usually best for detail work or on unusually shaped wooden pieces. Steel wool is a type of loose abrasive that is commonly used for sanding and finishing wood. It is available in different grades and can be used for tasks such as removing old finishes, preparing surfaces for staining or painting, and buffing to a high gloss. In general, for finishing tasks, a fine-grit abrasive such as sandpaper or abrasive sponge may be the best choice, while for rougher tasks, a coarser abrasive such as steel wool or flap disc may be more appropriate. It’s always important to use the right abrasive for the specific task at hand to achieve the best results.
●Metal
The best abrasive for metalworking depends on the specific task and the type of metal being worked on. Abrasives can be used on steel, aluminum, brass, and copper. Obviously, some of the materials are more malleable than others, requiring different abrasives. Many metals use grinding wheels that are made up of abrasive particles held together by a bonding agent and are commonly used for grinding and shaping metal surfaces. They are available in various grits and can be used with handheld grinders or stationary grinding machines. Metalworkers also use discs and belts. Discs are available in different grits and are ideal for shaping and smoothing contours and curves. Belts grind and finish flat or slightly curved metal surfaces. They are available in various grits and can be used with handheld sanders or stationary sanders. Wire brushes are commonly used for removing rust, paint, or other surface coatings from metal surfaces. They are available in different types, such as twisted wire brushes or crimped wire brushes, and can be used with handheld grinders or power tools. Finally, polishing compounds are a type of loose abrasive that is commonly used for polishing and buffing metal surfaces. They are available in different grades and can be used with polishing wheels or cloth.
●Plastic
Working with plastics is trickier. You want to avoid damaging or melting the plastic, which can be easy to do. Sandpaper and abrasive sponges are used on plastic. Again, if your piece is irregularly-shaped, a sponge might be perfect. Also, sponges are less likely to damage the plastic, which may mean you want to start there if you’re unsure. Abrasive pads are similar to abrasive sponges and are also a good choice for sanding and finishing plastics. They are available in different grits and can be used with handheld sanders or by hand.
●Concrete
You can even use abrasives on concrete. It’s a popular choice, these days, for modern kitchen countertops. In general, diamond abrasives are the preferred choice for concrete grinding and polishing because they are more durable and longer lasting than other types of abrasives. Diamond grinding wheels grind and shape concrete surfaces. They are available in various grits and can be used with handheld grinders or stationary grinding machines. Polishing pads polish and refinish concrete surfaces. They are available in different grits and can be used with handheld polishers or floor machines. Some people who handle concrete floors and countertops use abrasive blasting media, such as sand or shot, to clean and etch concrete surfaces. This is commonly done to prepare a surface for painting or other types of coating. Or it can add those finishing touches that your customer requests.
●Stone (Natural or Engineered)
Stone, such as granite and quartz, as well as engineered materials created to look like stone are popular choices these days among consumers. Both stone and natural stone are used inside and out, around fireplaces, and in countertops. And both need abrasives to polish, cut, and smooth them, albeit the types of abrasives vary. You can shape stone edges, remove scratches, and create a smooth finish. Depending on the type of stone, such as your hardest stone, you may need diamond abrasives to cut the material. Polishers and polishing compounds are also used to smooth and finish this material.
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FAQ
Q: What is the main use of coated abrasive?
Q: What are bonded abrasives used for?
Q: What are the typical grinding processes using a bonded abrasive wheel?
Q: What are coated abrasives made of?
Q: What is a coated abrasive and state what they are used for?
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Q: Is sandpaper a coated abrasive?
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