High-power gearboxes handle torques up to 200,000Nm

Employing Nord's proven Unicase concept, the gearbox case is a one-piece casting, with all bearing seats integrated and machined in a single process. This optimises strength and eliminates sealing surfaces that could deflect under the effect of torque or radial forces, minimising the possibility of oil leakage. The resulting high-integrity gearboxes deliver smooth, low-noise operation with a long service life.

There are four choices in the new High Power Unicase family, offering maximum torques of 60,000, 90,000, 135,000 or 200,000Nm. Available in helical-parallel shaft or helical/bevel right-angled drive configurations, a wide range of gear ratios can be specified using two-, three- or multi-stage reductions. The gearboxes are suitable for material handling and processing equipment in applications such as steel manufacture, aggregates, mining and grain handling. The low losses of the helical gearing technology means that Unicase gearboxes can deliver energy efficiencies of up to 96 per cent-plus.

Configured to order

Conforming to Nord Drivesystems' modular design concept, the plug-together approach to add-ons makes it simple to configure gearboxes for specific applications. A range of accessories includes brakes, backstops, a drywell facility, condition monitoring equipment and a choice of cooling systems. Combined with the flexibility to be mounted on six sides, or via an optional flange, the gearboxes can be adapted to address customer-specific power transmission requirements.

Because of the gearboxes' inherently high efficiencies, Nord Drivesystems expects the units to appeal to the refurbishment and repair market, especially where older, relatively inefficient worm gear units are being replaced. In such applications, the energy savings will often provide a payback on the investment within months.

As with all Nord Drivesystems gearboxes, the company's production line is set up for rapid manufacture of application-specific models in line with customer needs.