Endian developed angular contact ball bearings with gaskets

Endian developed an angular contact ball bearing with a dmn value (bearing pitch diameter (mm) × rotational speed (rpm)) of 1.7 million for high-speed bearing performance. The dmn value has increased by 20% compared to previous products, reaching the highest level in the world. As the "BNFS" series products, there are 20-100mm bearing inner diameter models. It can be used for spindles for machine tools such as machining centers and tapping machines. The sales target for 2010 is 1 billion yen/year.

Usually, for the sake of durability, a high-speed spindle with a dmn value of more than 1.4 million is oil lubricated by oil mist lubrication. Oil lubrication requires piping processing on the casing or external installation of a lubrication supply. If the grease lubrication method is used, these measures are not required, so it has been desired to achieve high speed in the grease lubrication mode.

The "BNFS" series developed this time optimizes the internal design, such as changing the diameter of the rolling element to minimize the reduction in bearing rigidity, while at the same time making it not rise sharply at very high speeds. In addition, the lubrication life of the grease is extended by the use of the new urea grease "SE-1".

Since it is a sealed bearing with a gasket, it does not require bearing cleaning and grease filling, which reduces man-hours. In addition, since an external lubrication device is not required, the cost can be reduced. The grease lubrication method also has the characteristics of not polluting the environment.

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