CBN Ranks High for Internal Gears

CBN Ranks High for Internal Gears


Together with diamond, CBN (Cubic Boron Nitride) is one of the superhard grinding materials. Both materials are superior to the conventional grinding materials corundum and silicon carbide in terms of hardness. There is no need for the time-consuming dressing when grinding with electro-plated CBN profile grinding discs; the discs also have a longer tool life. Very high process stability meets a high rate of metal removal – a combination users appreciate.

Liebherr-Verzahntechnik offers various discs which can be used with the new grinding head generations IG, OPAL 4.0 and 4.1 for internal grinding. CBN also has another advantage over corundum for internal grinding: These tools can be manufactured with very small diameters. Corundum tools reach their geometric process limit much quicker. With double- or triple-ribbed grinding discs the two steps roughing and finishing can be completed in only one process as the individual ribs have different grain sizes. As a result, the grinding time can be significantly reduced, but the high surface quality required can still be achieved.

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