KREBS & RIEDEL Vitrified-Bonded CBN and Diamond Wheels and Tools

Brand: Krebs & Riedel
Material: CBN, Diamond
Bonding: Vitrified Bond
Grain: FEPA / DIN 848 Narrow – 46–251 μm
Description: Vitrified-bonded CBN and diamond wheels are types of grinding wheels used in precision grinding applications. They are made under high pressure and temperature, used for grinding hardened steel and superalloys due to their high thermal conductivity and wear resistance. They can maintain their shape and sharpness for longer periods, making them ideal for high-volume production environments. Diamond wheels, on the other hand, are used for grinding hard and brittle materials such as glass, ceramics, and cemented carbides. They have high hardness and excellent thermal stability, making them suitable for precision grinding applications that require tight tolerances and fine finishes.
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Description

In cylindrical grinding – the most widespread pro-cess – the interior or exterior of rotationally symmetrical workpieces are machined. We offer the solution for every area – whether you need precision down to the µ for machining minute components for injection technology, combustion engines, or rollers for the paper industry that weigh tons. Surface grinding – plane-parallel machining of sur-faces with the wheel periphery or grinding face – is primarily used in the construction of tools and molds. The growing diversity of materials here is a challenge we are happy to meet, with proven and lucrative solutions for you. In creep feed or deep grinding, a workpiece is usually completed in a one-step procedure. This demands a high infeed motion for small workpiece feeds and thus large contact arcs between the workpiece and the grinding wheel. Our highly porous tools with very good cutting characteristics make this procedure fast and profitable. In profile grinding, profiled wheels are used to ma- chine outer peripheries. The workpiece itself deter- mines which wheel is used, along with the wheel’s specifications. We manufacture grit sizes and bonds especially adapted for specific radii and profiles, for example, to provide you with a wheel with excellent cutting characteristics, and less need for dressing and truing. We can handle the roughing of the wheel in order to save you set-up time. Roll grinding involves workpieces that require extremely intensive grinding. The wide range of rolls are matched by an equally wide range of materials and dimensions that can be selected to produce the most suitable wheel. Vitrified-bonded CBN and diamond wheels have generally proven to be the most efficient for this. Non-round grinding of items such as camshafts or pump rings is one of the most complex of grinding tasks. The non-round contour leads to changing contact and motion ratios. Deviations from dimensional and shape tolerances are strongly influenced by the quality of the grinding tool. We match our tools precisely to these requirements.. The hardest abrasive material in the world. As always, the hardest materials in the world – CBN and diamond – offer the greatest precision when grinding extremely hard iron and steel alloys or hard, brittle materials, and offer the best stock removal rates and the longest wheel life. Synthetic. Even better than the real thing. Cubic boron nitride, or CBN for short, is synthesized, like diamonds, from a hexagonal boron nitride at 50 to 90 kbar and 1,800 to 2,700°C. It is especially suitable for hard-to-machine or high-alloy hardened steels starting at 54 HRC, such as high-speed, tool or chrome steels, nickel-based alloys, powder metallurgical steels, or white cast iron. he hardest natural material in the world – the diamond – has been synthetically produced for more than 50 years now. It is synthetically produced from graphite carbon at pressures of 70 to 120 kbar and temperatures of around 2,000°C. Diamonds bonds are primarily used to machine brittle materials such as cemented carbide, ceramics, glass, granite, GFRP, semi-conductor materials, or wear coatings. An abrasive material is only as good as its bond. Outstanding wheel life, profiles that keep their pro-file, are easy to dress and true, with cool grinding and high cutting force. Benefits that are especially in demand in the automotive and roller bearing industries, in tool design and construction, and in making cutting tools. Our ceramic-bonded grinding wheels are distinguished by these properties and more. We’ve been producing them for you for more than 20 years now. During this time, we’ve developed numerous types of bonding agents, which not only promise but also deliver optimal grain bonding in a wide range of selectable porosities. The strength and hardness of the grinding wheel depend here not only on the proportion of bonding material; in fact, we adapt our bonding material precisely to the chemical interfacial reaction of the individual abrasive grains. A matter of being well-adjusted: The vitrified bond and its structure. You shouldn’t have to adapt to our wheels – we ad-just the bonding and thus the properties of the wheel precisely to your needs. Whether you need less fusible, soft, and brittle wheels or fusible, hard, and strong ones. Or anything in between – we adjust all that for you. Being well-adjusted pays off: Our vitrified-bonded wheels are distinguished by their greater efficiency and productivity. Along with long wheel life, they offer great cutting performance at cool temperatures and without sharpening. And of course, they can also be easily trued with lasting results. The base structure is of great importance at low cut- ting speeds as well. We select from a wide array of materials depending on the grinding and centrifugal forces, the heat build-up and dissipation, and the vibration of the machine and workpiece. Grain size and concentration have a direct influence on the performance of the wheel and on the sur-face quality that can be achieved on the workpiece. As a rule, we use grains in the particle size range of 46–251 µm in accordance with FEPA. The wheel is round. That’s the one thing that all wheels have in common. Diameters and thicknesses, base structures and coating layers, as well as compositions and profiles are at least as diverse and often just as unique as the tasks and challenges they face. Since we began producing vitrified-bonded diamond and CBN wheels, we’ve developed and produced countless special shapes. Because wheels can vary widely, we place a priority on working with you to determine exactly what your needs are. What workpiece do you need to process on which machine, and what is the goal? Then we construct a wheel for you that not only gets you close to your goal, but that lets you achieve it. Safely and efficiently. No matter what the wheels of the future will look like, you’ll get the one you need from us.

 

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