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20 September, 2021

Hannover Fair 2013 exclusive show report

23 June, 2013

Maxon motor has added two single-stage planetary gearheads for high radial loads to its GP32 range. The bearings have been repositioned and the planetary carrier reinforced to handle radial forces up to 140N in applications such as toothed belt drives. As an option, ceramic axles are available to achieve short-term torque ratings up to 1.25Nm.

Nexen was demonstrating a new harmonic gearhead designed to replace planetary gearheads, and said to require less than half the space of alternative technologies. The patent-pending strain wave gearing technology delivers a rigid, high-torque, zero-backlash system.

Parker Hannifin announced a 45mm-wide screw-driven linear positioner that can position loads of up to 7kg with a repeatability of up to ±1µm and an accuracy of 6µm (depending on the encoder used). The MX45S positioner is available in travel lengths of 5, 15 or 25mm and can be supplied with high-efficiency leadscrews or high-precision ballscrews. Both can produce up to 40N of thrust at linear velocities of 20mm/s and 30mm/s respectively.

Rossi presented a new series of gear reducers targeting applications such as conveyor belts in the mining sector. The G series reducers (above) have longitudinal finned housings with forced ventilation to lower the operating temperature and to allow increased power at constant operating temperatures. They are interchangeable, in terms of dimensions and spares, with Rossi’s existing helical and bevel-helical G05 products.

Schaeffler has developed a sealed spherical roller bearing which cuts grease consumption by up to 80% and has the same outer dimensions as non-sealed versions, thus providing an almost maintenance-free alternative that is also protected against contamination. The FAG E1 X-life bearing has an innovative seal that minimises the loss of grease and avoids the need for relubrication systems, while maintaining high dynamic and static load ratings.

Schaeffler has also expanded its range of large, long-life tapered and cylindrical roller bearings. Its two- and four-row tapered bearings with outer diameters of 320–625mm and its cylindrical roller bearings with diameters of 320–1,600mm will, in future, be available as X-life products with load ratings that are about 20% higher. This can be used to improved performance, reduce weights, or apply higher loads while maintaining the same rated lives.

Another Schaeffler innovation is a new plummer block housing which, it claims, will extend the operating lives of fitted spherical roller bearings by up to 50% compared to conventional housings. The FAG SNS housing (above), which can replace many existing housings directly, ensures optimum load distribution in the bearing. Further design optimisations make it easy to mount/dismount and improve conditioning monitoring.

SEW-Eurodrive has added a pair of low-loss two-stage helical-bevel gearboxes to the lower end of its power range. The compact K19 and K29 boxes offer efficiencies of more than 90% for all ratios, allowing smaller motors to be used in some applications. They have hypoid gearing in three different ratios in the output stage, and offer total ratios from 3–70.

SEW has also introduced two new planetary gear systems, extending its upper torque capacity to 500kNm. The arrival of the P092 and P102 boxes means that SEW now offers industrial planetary gears in 11 sizes covering a torque range from 24–500kNm. If required, the short gearboxes can be used with helical and helical-bevel designs in various combinations.

Siemens has developed a new generation of high-performance steel couplings offering increased axial offsets and larger bore capacities than previous versions. The Arpex couplings are also lighter, yet have a higher torque capacity. Component geometries have been improved, resulting in an optimised centre of gravity.

At Hannover, SKF unveiled a new range of long-life spherical plain bearings and rod ends (above) that need no lubrication and fill the gap between standard steel/steel plain bearings and maintenance-free TX plain bearings. The Extended Life bearings have heavy-duty triple-lip seals that almost eliminate the ingress of contaminants that could lead to premature bearing failures. A 100mm-bore bearing can save up to 876kg of grease per year.




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