Larger HPS spherical roller bearings from NSK

NSK have increased their ability to provide bearing users in tough, demanding environments with continuous operation and minimum maintenance, following the expansion of their HPS range of spherical roller bearings up to 260mm bore.

Fully optimized and uprated, the HPS bearings are said to offer twice the lifespan and a 20% higher limiting speed, compared to conventional spherical roller bearings (SRB). These performance advantages translate into user benefits, such as cost and energy savings and reduced bearing maintenance.

The improved wear resistance of the new larger size HPS bearings, under high speeds and high mechanical loads, allows them to cope with all types of demanding applications in a wide range of equipment types. Typically, these include pumps and compressors, cranes and other hoisting devices, paper machines, mining and extraction equipment technology, and conveyors and table rollers in the steel industry.

Designated the CAM series, the larger size HPS bearings differ in design from the existing HPS-EA range of SRB (up to 130mm bore), due to the increased demands placed upon them. They are equipped with a guide ring, giving precise roller guiding, and optimized solid brass retainers, which carry higher loads and offer very high wear resistance. In the smaller size EA series these features are achieved through a special surface treatment of the bearing steel plate retainers.

The optimized design features integrated into the HPS-CAM series not only increase the life span and the wear resistance of the bearings; they are said to also increase the dynamic load rating by up to 25%. As a result, the larger size HPS units can allow down-sizing in high loaded drive assemblies for demanding applications, providing both space and cost savings for users.

NSK UK Ltd, Northern Road, Newark, Notts NG24 2JF; tel: (0500) 2327464; fax: (01636) 643075