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Home > Vitrified bonded grinding wheels

Vitrified bonded grinding wheels

Vitrified bonded grinding wheels are made from CBN, diamond, electrocorundum , or silicon carbide. These products are divided into super-hard wheels, which use diamond and CBN as the grain, and conventional wheels, which are made using electrocorundum and silicon carbide.

These wheels are made as structured grinding wheels, which means that they contain voids called pores in their structure in addition to the bond and the grain. During operation, these pores make it possible to lower the temperature of the surface being machined.

Grinding wheels in this product category are manufactured in a wide range of profiles and sizes according to customer needs. These discs are used for flat grinding and machining of holes and profiles of any shape or size. Amongst other things, they are extremely useful in the precision machining of rolling bearings, fuel apparatus components, and many other applications.

CBN vitrified bonded grinding wheels

These grinding wheels are made from a super-hard CBN abrasive filled with a ceramic bond. High-performance grinding wheels are used for machining super-hard materials requiring high accuracy and high classes of surface smoothness. Vitrified bonded CBN grinding wheels exhibit a significant advantage over conventional tools in high-performance grinding processes. The physical properties of CBN (hardness, abrasion, and heat resistance) in combination with the characteristics of the vitrified bond (hardness, brittleness, porous tool structure) allow more efficient cutting of the workpiece material and high quality grinding.

 

Cubic boron nitride (CBN) is referred to as a super-hard material due to its significantly higher hardness compared to traditional abrasives such as aluminium oxide (Al2O3), also known as corundum, or silicon carbide (SiC), also known as carborundum.
CBN is used in grinding processes where the priority is to achieve excellent surface quality with high machining efficiency.

 

The main advantages of using abrasive tools made of CBN are as follows:

– long service life due to the preservation of the tool profile
– short processing times
– shorter auxiliary times due to fewer tool changes
– elimination of thermal damage to workpiece surfaces due to lower grinding temperatures
– maintenance of working profile

 

CBN abrasive tools are designed for machining:

– high-speed steels (HSS)
– tool steels
– steels for carburising
– bearing steels
– stainless and high-alloy steels with a hardness of at least 55HRC

 

Grinding wheels can be made on a vitrified or metallic body. A metallic body should be used for diameters above ø 300 as it is more homogeneous and allows operation at higher speeds.

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Vitrified bonded electrocorundum and silicon carbide grinding wheels

Vitrified bonded electrocorundum and silicon carbide grinding wheels are widely used in almost all industries. The possibility of extensively modifying their parameters and their good abrasive properties have made this type of grinding wheels suitable for machining most of the materials used today.

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Standard wheels
Ceramic flap wheel
Grinding wheels for machining of ball bearings
Wheels for fuel system machining

Vitrified bonded PCD/PCBN tool sharpening wheels

PCD (polycrystalline diamond) is a synthetic super-hard material used in the manufacture of cutting tools. It is made up of very hard diamond grains of micron size. The grains are bonded with a metallic bond and deposited on a carbide substrate. This combination results in a material with excellent properties, widely used in machining.

PCD is mainly used to process materials such as ceramics, aluminium, copper, laminates, wood, plastic, and rubber.

PCBN (polycrystalline boron nitride) is a synthetic material produced similarly to PCD, except that micron-sized grains of boron nitride are embedded instead of diamond.

PCBN is mainly used for machining materials such as tool steels, HSS, and high-alloy steels.

Compared to conventional tool materials, sharpening tools made of PCD or PCBN requires a different approach in terms of grinding methods and grinding wheel characteristics. Sharpening polycrystalline tools is a challenging task for both users and wheel manufacturers.

In order for the sharpening process of tools with PCD/PCBN elements to proceed correctly, the following are essential:
– an accurate grinder with appropriate rigidity and a vibration damping system to guarantee the high precision required when sharpening polycrystalline tools
– a specially designed wheel for high-performance and high-precision machining, providing excellent edge quality

Modern diamond grinding wheels designed for sharpening tools with polycrystalline diamond (PCD) and boron nitride (PCBN) cutting elements.
Cutting elements with PCD and PCBN blades are extremely durable tools, but require occasional sharpening.
Thanks to the use of modern technology, these grinding wheels have found their way into accurate and high-performance sharpening processes for super-hard PCD/PCBN tools, which are increasingly used in advanced manufacturing techniques in many industries.

 

Vitrified bonded diamond grinding wheels have the following advantages when sharpening cutting elements made of PCD and PCBN:
– high edge quality of PCD/PCBN elements after sharpening
– short grinding time
– long wheel life of grinding wheel
– high efficiency and accuracy
– significant reduction in unit sharpening costs
– low temperature machining

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DON'T KNOW WHAT TO CHOOSE?

Grinding wheels selection guide

See the vitrified wheel selection guide

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INTER-DIAMENT® Kacprzycki Sp.j.
st. Chełmońskiego 30
05-825 Grodzisk Mazowiecki, Poland

+48 22 755 69 83
+48 22 755 58 78
+48 22 734 18 63

handlowy@inter-diament.com.pl
inter@inter-diament.com.pl