NSK announced that it has expanded the size of its high-performance standard NSKHPSTM series of large spherical roller bearings for industrial machinery. NSK has added 400mm to 600mm size range bearings to its NSKHPSTM Series of large spherical roller bearings. These bearings achieve twice the lifespan of conventional bearings and offer 30% lower heat generation and dimensional stability under high temperatures (up to 200°C). HPS bearings also help improve productivity and reduce maintenance costs by improving the reliability of industrial machines. Development background NSK is strengthening its position in the aftermarket by focusing on the maintenance, repair, and operation (MRO) business. This demands comprehensive product power that adds reliability and after-sales service with superior product performance. In response to these demands, NSK has been leveraging its development, design, material and production technologies to expand the line-up and performance of its standard bearings. Since NSK first introduced the NSKHPS Series of small spherical roller bearings back in 2004, it also added angular contact ball bearings in 2009, and deep groove ball bearings and small cylindrical roller bearings in 2013, as well as other bearings, for a total of six types of bearing, ranging to a maximum size of 400mm. Due to increased demand, NSK has expanded the size range of its NSKHPS spherical roller bearings to further strengthen its MRO business for a wide range of industrial machines. New product features NSK has independently researched the cause of damage that is specific to spherical roller bearings to develop technology that increases bearing life. In addition to this technology, NSK developed and applied low heat generation technology to produce the following features for these new bearings: 1. Long life: The new HPS bearings realise optimal friction of the outer ring and rollers and reduce the slip of the inner ring and rollers to offer twice the life of conventional bearings. 2. Low heat generation: The cage and the guide ring design have been optimised to suppress tilting in the rollers, creating 30% less heat generation than that of conventional bearings. 3. Dimensional stability under high temperatures: Heat treatment has been applied for dimensional stability for temperatures up to 200°C. New Product Benefits NSK contributes to improving productivity and lowering maintenance costs for its customers by increasing the reliability of industrial machines.