Krebs & Riedel is specialized in gear grinding. Gears are among the most important mechanical elements in the construction of transmissions, vehicles and machinery. Gear grinding is one of the most important methods for meeting these high demands. For this purpose, Krebs & Riedel provides proven grinding tools for virtually all types of machines when it comes to continuous generative grinding, profile grinding, gearshafts and bevel gear grinding.

Top high-precision grinding of hard iron and steel alloys or hard and brittle materials, the best removal rates and the longest service life are still provided by the hardest materials in the world: CBN and diamond. Cubic boron nitride, CBN for short, is particularly suited to difficult to machine or high-alloyed hardened steels with a hardness of 54 HRC or more such as high-speed steel, tool or chrome steel, nickel-based alloys, powder metallurgy steels or white cast iron.

A major advantage of vitrified bonding is the controllable porosity. Highly porous grinding wheels are in particularl needed for productive deep and creep-feed grinding processes to transport the cutting fluid directly into the contact zone and to optimally remove the generated grinding chips and heat.

Abrasive grains embedded in PU bonding systems can achieve surface roughness values of ≤ Ra 0.1 μm. We process grain sizes up to 1500 mesh. Given the variety of materials used (e.g., soft to hardened steels, ceramics, or composites), specifying fine grinding and polishing tools is crucial for surface finish, productivity, and tool longevity. Our PU bonding systems can be manufactured with varying degrees of hardness and tailored to specific applications.

Typical Applications

• Polishing grinding of gears (automotive, aerospace, general mechanical engineering)
• Tool functional surfaces (e.g. chip flutes of carbide drills, form tools)
• Knives (industrial knives, scalpels, kitchen utensils)
• Glass and ceramic processing (protective glasses, lenses / lenses, wafers)
• Laboratory equipment (sample preparation)
• Jewelry industry (e.g. watch cases)

Advantages
• High-quality surfaces and functional surfaces
• Comprehensive product portfolio for all fine grinding and polishing applications
• Customized solutions with quality tools
• Comprehensive customer service and support worldwide
• Continuous development through R&D
• On-time delivery, fast delivery times and flexibility
• All products are „Made in Germany“
• Highest precision and excellent tool life
• Diameters up to 800 mm

Fine grinding- & polishing tools forhigh-quality surfaces and functional surfaces . The trend towards fine and polished surfaces is increasing year by year. In the medical and food industry, fine surfaces are used to minimize bacterial adhesion. While in gear and drive technology, the focus is primarily on reducing noise, friction reduction is the main concern in engine construction. In traditional mechanical engineering, for example, durability is of high importance due to reduced notch effect. Thus, component design can be optimized accordingly.

In many areas, roughnesses ≤ Ra 0.1 μm are required. Due to the use of different materials (e.g. soft to hardened steels, ceramics or composite systems), the specification of fine grinding and polishing tools is crucial for surface results, productivity and tool life. Our PU bonding systems can be manufactured in different hardness grades and adapted to the respective application.

While material removal takes place in the grinding process, tips in the topography are mainly smoothed in the polishing process (creating a new topography). The fine grinding or polishing process involves a certain amount of pressure. The dressing process can be carried out with both stationary and rotating tools.

High performance DIA & CBN double disc grinding wheels for face and finegrinding Krebs & Riedel has many years of experience and references in double disc grinding. We offer tailor-made solutions for a wide range of applications, machines and workpieces in the area of face and finegrinding. Krebs & Riedel manufactures double disc grinding wheels up to 1500 mm outer diameter made of DIA and CBN in vitrified bond for the effective creation of flat surfaces with a high surface quality and shape tolerance for a wide range of different materials. The range includes grinding tools in different segmentation for single and double disc grinding machines with and without planetary kinematics. Compared to other systems, the vitrified bond system by Krebs & Riedel allows the production of very free cutting and porous coating structures. This results in a significant increase in productivity.