In the world of precision machining, external circular grinding wheels play a pivotal role. As a seasoned supplier of external circular grinding wheels, I’ve witnessed firsthand the diverse range of these tools available in the market. Each type is designed with specific applications, materials, and performance requirements in mind. In this blog, I’ll delve into the different types of external circular grinding wheels that you can find today, helping you understand which one might be the best fit for your machining needs. External Circular Grinding Wheel
1. Aluminum Oxide Grinding Wheels
Aluminum oxide is one of the most commonly used abrasives in external circular grinding wheels. These wheels are known for their versatility and durability. They are suitable for grinding a wide range of materials, including carbon steel, alloy steel, and cast iron.
The reason for their popularity lies in the properties of aluminum oxide. It has a relatively high hardness, which allows it to maintain its cutting edge for a long time. This means less frequent wheel dressing and longer wheel life. Additionally, aluminum oxide abrasives are self – sharpening. As the grains wear down, new sharp edges are exposed, ensuring consistent cutting performance throughout the wheel’s lifespan.
For general – purpose grinding operations, such as rough grinding and finishing of steel components, aluminum oxide grinding wheels are an excellent choice. They can be found in various grit sizes. Coarser grits (e.g., 24 – 60) are used for rapid material removal in rough grinding, while finer grits (e.g., 80 – 220) are employed for precision finishing to achieve a smooth surface finish.
2. Silicon Carbide Grinding Wheels
Silicon carbide is another important abrasive used in the production of external circular grinding wheels. These wheels are particularly well – suited for grinding non – ferrous metals, such as aluminum, brass, and copper, as well as hard and brittle materials like ceramics and glass.
Silicon carbide has a higher hardness than aluminum oxide and is more friable. This friability means that the abrasive grains break down more readily during grinding, which is beneficial when grinding hard and brittle materials. The broken grains create new cutting edges, preventing the wheel from loading up with material and ensuring efficient grinding.
In the case of non – ferrous metals, silicon carbide wheels can provide a better surface finish compared to aluminum oxide wheels. They are also used in applications where heat generation needs to be minimized, as silicon carbide has better thermal conductivity. For example, in the grinding of aluminum parts, a silicon carbide wheel can help prevent the aluminum from melting and sticking to the wheel, which can lead to poor surface quality.
3. Cubic Boron Nitride (CBN) Grinding Wheels
Cubic boron nitride is a superabrasive that offers exceptional performance in external circular grinding. CBN grinding wheels are mainly used for grinding hard materials, such as hardened steels, high – speed steels, and nickel – based alloys.
The hardness of CBN is second only to diamond, making it extremely effective at cutting through tough materials. CBN wheels have a long service life, even when grinding hard – to – machine materials. They can maintain their shape and cutting edge for a much longer time compared to conventional abrasive wheels, resulting in fewer wheel changes and higher productivity.
In addition to their durability, CBN wheels can achieve very high – precision grinding. They are capable of producing tight tolerances and excellent surface finishes, which are crucial in applications such as aerospace and automotive manufacturing, where the quality of the machined parts is of utmost importance. However, CBN wheels are more expensive than aluminum oxide or silicon carbide wheels, so they are typically used in high – value applications where the benefits justify the cost.
4. Diamond Grinding Wheels
Diamond is the hardest known material, and diamond grinding wheels are the go – to choice for grinding extremely hard materials, such as carbide, ceramics, and natural stones.
Diamond grinding wheels offer unparalleled cutting performance. They can quickly remove material from hard surfaces with high precision. In the machining of carbide tools, for example, diamond wheels are essential for achieving the sharp edges and fine surface finishes required for high – performance cutting tools.
The use of diamond as an abrasive also allows for high – speed grinding operations. Diamond wheels can operate at higher rotational speeds than other types of wheels, which can significantly increase the productivity of the grinding process. However, like CBN wheels, diamond wheels are relatively expensive. Their cost is offset by their long service life and the high – quality results they produce.
5. Resin – Bonded Grinding Wheels
The bonding material used in a grinding wheel is just as important as the abrasive. Resin – bonded grinding wheels are a popular choice in external circular grinding. Resin bonds are made from organic materials, such as phenolic resins.
Resin – bonded wheels are known for their flexibility. They can conform to the shape of the workpiece to some extent, which is beneficial in achieving a uniform surface finish. They also have good heat dissipation properties, which helps prevent overheating of the workpiece during grinding.
These wheels are commonly used in applications where a high – quality surface finish is required, such as in the finishing of precision components. Resin – bonded wheels can be used with a variety of abrasives, including aluminum oxide, silicon carbide, CBN, and diamond. They are available in different hardness grades, allowing for customization based on the specific grinding requirements.
6. Vitrified – Bonded Grinding Wheels
Vitrified bonds are made from inorganic materials, such as glass and ceramics. Vitrified – bonded grinding wheels are very rigid and have excellent dimensional stability.
They are capable of withstanding high grinding pressures without deforming, which makes them suitable for heavy – duty grinding operations. Vitrified – bonded wheels also have good porosity, which allows for efficient chip removal and prevents the wheel from loading up.
In addition to their strength and porosity, vitrified – bonded wheels can maintain their shape for a long time. This is crucial in applications where precise grinding geometries are required, such as in the production of gears and shafts. They are commonly used with aluminum oxide and silicon carbide abrasives, and they are available in a wide range of grit sizes and hardness grades.
7. Metal – Bonded Grinding Wheels
Metal – bonded grinding wheels use a metal matrix, such as bronze or nickel, to hold the abrasive grains. These wheels are typically used with diamond and CBN abrasives.
Metal – bonded wheels are extremely strong and can hold the abrasive grains firmly in place. They are suitable for grinding hard and brittle materials where high material removal rates are required. For example, in the grinding of carbide inserts, metal – bonded diamond wheels can quickly shape the inserts with high precision.
However, metal – bonded wheels are less porous than resin – or vitrified – bonded wheels, which can lead to heat buildup during grinding. Therefore, proper cooling and lubrication are essential when using metal – bonded wheels to prevent damage to the workpiece and the wheel.
Conclusion
As an external circular grinding wheel supplier, I understand the importance of choosing the right wheel for the job. The market offers a wide variety of options, each with its own unique properties and applications. Whether you’re grinding steel, non – ferrous metals, hard ceramics, or carbide, there’s a grinding wheel that can meet your specific needs.
Vitrified Grinding Wheel If you’re in the market for external circular grinding wheels and need help selecting the right type for your application, I’m here to assist you. Our team of experts has extensive knowledge and experience in the field of grinding wheels. We can provide you with detailed information, technical support, and high – quality products. Contact us to start a discussion about your grinding requirements and let’s find the perfect solution together.
References
- "Grinding Technology: Theory and Applications of Machining with Abrasives" by Paul R. Blau
- "Handbook of Machining with Grinding Wheels" by Yoram Koren
- Various industry – specific research papers on grinding wheel performance and applications
Zibo Longshine International Co., Ltd.
Zibo Longshine International Co., Ltd. is one of the most professional external circular grinding wheel manufacturers and suppliers in China, specialized in providing high quality customized products. We warmly welcome you to buy high-grade external circular grinding wheel at competitive price from our factory.
Address: No,7, Jinjie, Beijing Road, Zhangdian, Zibo, Shandong, China
E-mail: ding@zblongshine.com
WebSite: https://www.zblongshine.com/
