Australasian Mining Review
Issue link: http://ebook.aprs.com.au/i/37922
284 NSK - a partnership based on trust and trust based on quality M NSK works with both global manufacturers of mining machinery and end users in the fi eld, to co-develop a package of tough, high- performance bearings that offer a longer service life under demanding mining conditions. NSK’s innovative designs begin with market leading materials and unique heat treatment technologies that NSK develop in-house to produce both ball and roller bearings, that out-perform customers expectations. ark Davies, NSK Australia’s Mining Manager says, “one of the key factors in the enhanced performance of NSK bearings range is the development of industry leading materials technology, in particular NSK’s Tough Steel™ range”. Bearings made from the varying grades of Tough Steel™ are designed to out-perform normal bearings in contaminated, high temperature or inadequate lubrication conditions. Surface orientated fatigue and material wear from contaminated lubricant is a common failure mode in the mining industry. As a key benefit from using NSK’s Tough Steel™, the fine particle wear resistance of the Tough Steel™ increases operational life substantially. As NSK’s Tough Steel™ technology can be used in any bearing design, NSK are able to tailor a solution to many mining application’s common modes of failure, providing an effective countermeasure to the operating conditions that are causing the reduced operating life. NSK have developed varying grades of Tough Steel™ for heavy industries and this technology is in common use throughout the world today, in applications such as Slurry Pump barrels, Vibrating Screen mechanisms, Longwall AFC sprockets, Dragline gearboxes and Coal Pulverizes In addition to Tough Steel™ material technology, another NSK development in standard material bearings is NSK HPS (High Performance Series). This technology originally developed in small to medium size Spherical Roller bearings has now been extended to the brass caged CA series large Spherical Rollers Bearings and Vibration Spec. Spherical Roller Bearings. Davies says “it is expected that the new series of HPS bearings will give user’s large benefits such as reducing their maintenance cost, down-sizing their product design and saving energy. It exceeds the limits of conventional bearings in terms of a longer operating life and limiting speeds, helping to deliver the high levels of reliability required in mining projects”. Developed for applications with heavy or shock loads - of the type encountered in jaw and cone crushers - NSK’s CA series of double-row spherical roller bearings are manufactured with a machined brass cage to combat the effects of vibration, operating fatigue, wear and corrosion. NSK have further extended the HPS range into harsh vibrating applications with NSK’s CAM-VS series of spherical roller bearings. The CAM-VS series bearings have been optimized for use in harsh vibrating applications. Their HPS vibratory specification builds upon the extended load and life benefits of the standard CA construction with an optimized design that provides improved fatigue strength against the vibration and shock-load conditions encountered on screens, feeders and compactors. Davies says “with increased speed limits up to 20% higher than standard bearings, bore dimensions between 50 and 240mm and operating conditions up to 200°C, NSK’s HPS CA series spherical roller bearings are specifically designed for the tough vibrating applications in the mining, quarrying and construction industries”. Extra capacity Cylindrical Roller bearings also providing improved performance benefits in extending operating life and speed rating. NSK’s EW/EM series of cylindrical roller bearings lead the market in innovative design. The EW series features a pressed steel cage and the EM series a one-piece machined brass cage. These bearings are used in, industrial Electric Motors, Gearboxes, Dump Trucks and other Mobile Fleet. Both of these cage designs offer high-load ratings for standard-size bearings, in addition to a longer operating life - approximately twice that of a conventional CRB. Also benefiting from NSK’s focus on improving bearing life in mining and extraction applications is a range of full- complement cylindrical roller bearings for use in crane sheeves. These bearings offer advanced levels of ingress protection with a sealing system that minimizes grease leakage and increases resistance to the entry of water and other foreign substances. Designed to provide maximum reliability and operating life in the difficult environments encountered in mines and quarries, the full-complement bearings are supplied with phosphate surface treatment to improve their resistance to corrosion. NSK welcome any communication to discuss how they can assist in getting the best bearing life outcome for your company. Contact NSK by telephone (03) 9764 8302 or email enquires to aus-nskenquiries@nsk.com [Bearings] _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _