Tokyo, Japan, June 19, 2009 - NSK Ltd. (NSK; Headquarters: Tokyo, Japan; President and CEO: Norio Otsuka) has developed new low-torque, highly rigid, sealed thin-walled angular contact ball bearings especially for use in factory automation equipment. The new bearings deliver lower torque, smaller size, lighter weight and better rigidity than conventional angular contact ball bearings. When used in electrical actuators and industrial robots, the new bearings will enhance precision and energy efficiency, as well as save space and dramatically reduce maintenance. NSK expects annual sales of 500 million yen by fiscal 2011.
In a wide range of industries including medical treatment, biotechnology, optical components and automobiles, there is a growing need to improve processing accuracy, reduce transport process, and improve precision and efficiency. In the actuators and the joints of robots utilized in transport and processing applications, gear drives were the conventional choice. Today, however, DD (direct drive) motors that enable high-precision positioning are becoming increasingly common, driving demand for bearings with even lower torque and higher rigidity.
Optimizing the design of the internal specifications of the bearings, NSK has developed compact, highly rigid, energy-saving angular contact ball bearings that realize both low torque and minimal torque fluctuations.
Utilizing angular contact ball bearings in robot joints and electrical actuators featuring advanced DD motorization improves precision and energy efficiency, while also saving space and dramatically reducing maintenance.