NSK: Bearings for rail vehicles (2. strana)

rail transport l components Insulated bearings with PPS coating To prevent electrical damage to the bearing, NSK has developed insulated bearings with a special ceramic or PPS coating on the surface of the outer ring. Insulated bearings have high insulation resistance and high resistance to damage. The insulation resistance of these bearings is not reduced, even at 110 °C. Traction motors use insulated roller and ball bearings. Bearings with an insulated surface are provided in standard dimensions, no special preparation of the opening is therefore required for their installation. Insulated bearings with ceramic coating wear-resistant design and a higher number of rollers. The high strength of the cage provides excellent performance in vibrating equipment. The service life of these bearings is RCT bearings for rail vehicle axles Gearbox bearings Bearings for rail vehicle axles d They have to meet a very wide range of requirements. These include a combination of different loads - high static and dynamic radial loads, radial impact loads, and axial loads. In addition, the axle plays a critical role in railway safety, therefore regular inspections must be carried out including dismantling, inspecting, maintaining, and reassembling the components. A reliable and simple disassembly and reassembly procedure is therefore another important factor. Tapered roller bearings, roller bearings, and spherical roller bearings are used in the axles of rail vehicles based on the benefits of each type. To improve operational efficiency, axle bearings must also provide longer inspection intervals. Based on all of these requirements, satisfactory solutions have been offered. 6 types of NSK axle bearings • RCT bearings (sealed tapered roller bearings with end cover) • RCC bearings (sealed roller bearings with end cover) • Spherical roller bearings • Roller bearings combined with ball bearings • Roller bearings with ribs • Tapered roller bearings d These have to withstand high loads and high speeds and it is essential that they are highly resistant to rolling motion, impacts, and extreme temperatures. Therefore, rolling bearings with robust cages are most often used. • Roller bearings • Tapered roller bearings • Four-point bearings • Angular contact ball bearings • Large single row ball bearings NSK EM series roller bearings up to twice as long as standard roller bearings. The main application areas of EM roller bearings include gearboxes, papermaking machines, and steelworks operations. NSK's facilities are fully utilized by its authorized distributors around the world. The Czech company Coroll has been using them since its foundation in 1995, when it started presenting NSK products on the Czech market. Corrol has been using the professional support of this top manufacturer for more than 20 years; it regularly participates in training programs and in 2019 received the AIP certificate - the highest possible certification for an NSK distributor. It is the first and only AIP partner of NSK in the Czech Republic. p d NSK tapered roller bearings NSK EM series roller bearings d Bearings for very demanding operations provide an innovated internal structure of the bearings which guarantees a high load capacity, strength, quiet operation, and extended service life. These bearings have a one-piece robust brass cage of special QUALITY DECIDES www.coroll.cz www.technikaatrh.cz 25