Grinding wheels are the most important type of abrasive tool in grinding process. The grinding wheel is a porous body made by adding a binder to the abrasive, compacting, drying and firing. Due to different abrasives, bonding agents and manufacturing processes, the characteristics of grinding wheels vary greatly, which has an important impact on the processing quality, productivity and economy of grinding. The characteristics of the grinding wheel are mainly determined by factors such as abrasive, particle size, bond, hardness, structure, shape and size.
Abrasive wheels are divided into two types: grinding discs and cutting discs. What are the products and uses of the two? What is the difference between these two? Today, ChangZhou DOME Abrasives Manufacture will introduce to you to avoid wrong use.

First of all, what is cutting disc?
Resin cutting discs use resin as a binder, combined with a variety of materials, especially for difficult-to-cut materials such as alloy steel and stainless steel. Dry and wet cutting methods make the cutting accuracy more stable. At the same time, the choice of material and hardness of the cutting blade can greatly improve your cutting efficiency and save your production cost. Generally speaking, the cutting disc is thinner, ≤3mm The most important is slicing, which is mainly used for cutting common metals and stainless steel.
Then,what is grinding wheel?
Grinding wheel is a kind of resin abrasive tool with special fiber fabric as reinforcement material. Grinding wheel have high tensile strength, impact resistance and bending strength. Grinding wheel are widely used in grinding and rust removal of various metal and non-metal materials, which is fast and economical. Using resin as binder and glass fiber mesh as reinforced high-speed grinding tool, it has high toughness, high impact strength, high grinding rate, easy to use and safe. The maximum operating speed can reach 80m/s. It is installed on various grinding machines for free grinding. It is easy to use and is widely used in various aspects of automobiles, ships, machine manufacturing, metallurgy, and chemical construction. Clean up welds, solder joints, polish castings, burrs, burrs, repair metal surface defects, etc. Used for ordinary steel, steel pipe, angle steel, stainless steel, sheet steel, stone, concrete, etc.
Scope of application Metal? Grinding wheel are tools for grinding, lapping and polishing. Most of the grinding tools are artificial grinding tools made of abrasives and bonding agents, and natural grinding tools are also directly processed into natural ore rocks. In addition to being widely used in machinery manufacturing and other metal processing industries, abrasive tools are also used in the processing of non-metallic materials such as grain processing, paper industry, ceramics, glass, stone, plastic, rubber, and wood. During the use of the abrasive tool, when the abrasive grains are blunt, due to the partial fragmentation of the abrasive grain itself or the fracture of the bond, the abrasive grains fall off partially or completely from the abrasive tool, and the abrasive on the working surface of the abrasive tool continues to appear new cutting The cutting edge, or new sharp abrasive grains are constantly exposed, so that the abrasive tool can maintain the cutting performance for a certain period of time. Abrasives are divided according to their source of raw materials, and there are two types of natural abrasives and artificial abrasives. The natural abrasive tools commonly used in the machinery industry are only whetstones. Artificial abrasives are divided into five categories according to their basic shape and structural features: grinding wheels, grinding heads, oil,stones, sand tiles (collectively referred to as bonded abrasives) and coated abrasives. Ordinary abrasive bonded abrasives are abrasive tools that consolidate ordinary abrasives into a certain shape and have a certain strength by a binder. It is generally composed of abrasives, bonding agents and pores. These three parts are often called the three elements of bonded abrasives. Angle grinding disc bonded abrasives can be divided into ordinary abrasive bonded abrasives and super abrasive bonded abrasives according to the abrasives used. The former is made of ordinary abrasives such as corundum and silicon carbide, while the latter is made of super abrasives such as diamond and cubic boron nitride. Abrasives play a cutting role in abrasive tools. The binder is a material that consolidates loose abrasives into abrasive tools, and there are two types of inorganic and organic. Inorganic binders include ceramics, magnesite, and sodium silicate; organic binders include resin, rubber, and shellac. The most commonly used of these are ceramic, resin and rubber bonds. The hardness of the abrasive tool mainly depends on the amount of bonding agent added and the density of the abrasive tool. If the abrasive grains fall off easily, it means that the hardness of the abrasive tool is low; otherwise, it means that the hardness is high. The grades of hardness are generally divided into seven grades: super soft, soft, medium soft, medium, medium hard, hard and super hard, and several subgrades can be subdivided from these grades. The methods for measuring the hardness of abrasive tools are the hand awl method, the mechanical awl method, the Rockwell hardness tester method and the sandblasting hardness tester method. The hardness of the abrasive tool has a corresponding relationship with its dynamic elastic modulus, which is beneficial to use the audio method to measure the dynamic elastic modulus of the abrasive tool to express the hardness of the abrasive tool. In the grinding process, if the material hardness of the workpiece to be ground is high, the abrasive tool with low hardness is generally used; otherwise, the abrasive tool with high hardness is used. The structure of angle grinding discs is roughly divided into three categories: tight, medium and loose. Each category can be further divided into subdivided numbers, etc., which are distinguished by organization numbers. The larger the organization number of the abrasive tool, the smaller the volume percentage of the abrasive in the abrasive tool, and the wider the gap between the abrasive grains, indicating the looser the organization. Conversely, the smaller the weave number, the tighter the weave. The organization of the abrasive tool is only controlled by the formula of the massage tool during manufacture, and is generally not measured. Abrasive grains with a tighter structure are not easy to fall off, which is conducive to maintaining the geometric shape of the abrasive. Abrasives with a loose structure are not easy to be passivated during use, and generate less heat during the grinding process, which can reduce heat deformation and burns of the workpiece.
What is the difference between the grinding disc and cutting disc?
1. The purpose is different. The grinding disc is used for grinding. For example, the burr on the surface of the workpiece needs to be polished, and the welding tumor on the surface of the workpiece needs to be polished. At this time, the angle grinder is equipped with a grinding disc to remove the burr and weld tumor grinding;
The cutting piece is used for blanking. For example, if you want to cut a 2-meter-long channel steel into two sections, you need to use a cutting piece.
2.The thickness is different. The grinding disc is thick and the cutting disc is thin. The thickness of the cutting disc with a diameter of 100 is about 1mm, while the thickness of the grinding disc with a diameter of 100 is more than 10mm.
The cutting disc is thin, so that the waste of material is the least, and the resistance when cutting is also small. If you use it to grind, the side will be stressed, and it will be broken in one go
The thick grinding disc can withstand a large lateral force, and it will not move down when cutting with it.
Therefore, it is necessary to choose the required product correctly. If you need to cut and choose a cutting disc, if you need to polish it, you must choose a grinding disc to install and use.
When using the grinding wheel as a grinding tool, you must pay attention to the operating specifications, otherwise accidents will easily occur. So how can it be regarded as its standardized method of use?
When using the grinding wheel, you should first abide by the safety rules of GB2494 abrasive tools;
Only a single piece of grinding wheel is allowed to be installed and used, and it is strictly forbidden to install and use two or more pieces at the same time;
The speed of the grinding wheel cannot exceed the working line speed stipulated by the trademark of the grinding wheel. When using a pneumatic grinder, it is necessary to prevent the unstable air pressure from causing the grinding wheel to exceed the maximum speed;
The storage time of the grinding wheel is one year. After the time is exceeded, the rotary inspection should be carried out again, and it can be used only after it is confirmed to be qualified;
When using the grinding wheel, the force should be increased slowly. Excessive force may cause stalling, jamming and smashing of the grinding wheel. If it is stuck, the cutting wheel should be lifted immediately to avoid burning or jamming of the grinding wheel.
As the grinding wheel is dangerous, be sure to wear safety protective equipment when using it
Finally, if you are interested in our cutting discs and grinding discs, welcome to contact us for free samples for quality testing, we will be your best choice.
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