Tokyo, Japan, April 1, 2014 – NSK Ltd. (NSK; Headquarters: Tokyo, Japan; President and CEO: Norio Otsuka) today announced that it has expanded its Creep-Free™ bearing series lineup. These bearings are widely used in fan and pump motors to prevent creep. This series of bearings is designed with exceptional creep resistance, which helps improve motor maintenance and assembly performance. NSK is targeting 1.2 billion yen in global annual sales by 2017 through this expansion to its Creep-Free™ bearing series lineup.
Due to the constraints of assembly, motor bearings are often used with a clearance fit*1 between the outer race and the housing. Depending on the usage conditions, if rotational load*2 is exerted on the bearing, a slip phenomenon called creep can occur between the housing and the bearing, which results in wear that can reduce the life of the bearing. In 2007, NSK launched its Creep-Free™ series of bearings of an inner diameter (ID) of 45 mm or smaller. This series has been very well received by our customers. In response to the needs from our customer base for the same kind of bearings for larger, higher output power motors, NSK has expanded its lineup to an ID of 100mm.
|*1 clearance fit:||Installing with a gap between the bearing, shaft and housing.|
|*2 rotational load:||The radial load that changes the direction to the rotating shaft.|