52 POWER TRANSMISSION
Electrically insulated bearings prevent damages by electro corrosion
or modern electrical machines with high degree of performance and demanding reliability and service life, equipment failures due to electro corrosion could cause significant problems. NKE Austria offers electrically insulated bearings which provide optimum protection against damages by undesirable passage of currents. NKE electrically insulated rolling bearings reliably prevent current discharge. Three versions are available. Bearings with oxide ceramic insulating layers – Applied with plasma technology, the insulation has a guaranteed dielectric strength of at least 1000 V ac or dc. SQ77: Insulation on the outer ring.a SQ77E: Insulation on the inner ring. SQ77B (hybrid bearing): Rolling bearing with oxide ceramic rolling elements.
F
Fig. 1. NKE electrically insulated bearings provide optimum protection against bearing damange caused by the passage of currents.
Resistance of insulation theoretically indefinte. The advantages of NKE electrically insulated bearings are: n Higher operational reliability through
Sub-Miniature 10 mm and 15 mm valve manifolds
10 and 15 mm solenoid valve sereies. They offer the efficient grouping of valves along with fast installation. Each manifold features a common inlet, individually-ported outlets, and exhaust to atmosphere. Units are single sided, and available with 2, 4, 6, 8, 10, 12, 14 and 16 stations.
S
mall, compact sub-miniature manifolds are designed for use with Clippard´s
optimum protection against electrical corrosion More economic than, for example, insulation on housings or shafts. n Interchangeable: Same key dimensions and technical properties as conventional bearings
Coating resistant to damage if correctly
handled NKE manufactures electrically insulated cylindrical roller and deep groove ball bearings in standard sizes with outer ring diameter between 80 mm and 400 mm. Other bearing types and special sizes are available upon request. n
Enter 52 or ✔ at
www.engineerlive.com/ede
NKE AUSTRIA GmbH is based in Steyr-Gleink, Austria.
www.nke.at
Spherical roller bearings offer perfromance improvements A
new range of spherical roller bearings is now available that is claimed to offer up to 60 per cent longer service life, higher limiting speeds, increased load ratings and lower energy consumption, resulting in reduced operating costs. Schaeffler Group's FAG E1 spherical roller bearings with outside diameters larger than 320mm are now available in X-life premium quality versions, providing significantly improved bearing performance. The improvements in quality, performance and running accuracy were achieved by developing new cages and rollers with new dimensions and crowned faces.
Clippard offers a complete line of 2- and 3-way 10 mm and 15 mm valves in either normally-open or normally-closed configurations. These are suitable for small and compact areas where pneumatic controls are needed. n
Enter 52A or ✔ at
www.engineerlive.com/ede
Clippard Europe is based in Louvain-la- Neuve-Sud, Belgium.
www.clippard.eu
By upgrading the standard FAG E1 spherical roller bearings to X-life quality, customers benefit from a 15 per cent increase in load ratings, 50 per cent higher limiting running speeds and up to 60 per cent longer service life compared with their predecessors. This means, says the comaony, that in applications where bearing performance specifications remain unchanged, customers can reduce costs by downsizing and installing smaller, more cost-effective bearings. Schaeffler's FAG range of spherical roller bearings is suitable for demanding
operating environments, particularly for applications in which very high load- carrying capacity and reliability are key design criteria. The spherical roller bearings support axial forces in both directions and high radial forces. Many bearing sizes within Schaeffler's spherical roller bearing range can now be converted to X-life quality. These bearings have no central rib on the inner ring and are therefore able to use longer barrel rollers. In addition, the bearings benefit from improved kinematics, optimised surfaces and are made from higher-performance materials. As a result, the basic dynamic load rating and basic rating life (under identical operating conditions) are significantly improved. In some applications, this means a smaller bearing can be specified. For customers, says Schaeffler Group, these benefits translate into higher machine availability, new design possibilities, more economical bearing supports due to downsizing, and lower operating costs due to reduced energy consumption. n
For more information, visit
www.schaeffler
.co.uk
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