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Issue link: https://coal.epubxp.com/i/131326
product news continued loading motors. The chain conveyor is now driven hydraulically for better speed control, although electric drive can be specified for less abrasive applications. Sandvik has redesigned the cutter gearbox, with internal sealing that is cheaper to maintain although, as it points out, the gearbox remains fully compatible with the model used on the MR340. The electric panel is now housed in an ATEX-approved flameproof box that can also incorporate a monitor screen where profile control is used. Sandvik is in the process of gaining national approvals for this enclosure, with the aim of having a standardized installation on all its machines, worldwide. Two types of water spray are available, the choice depending on local regulations. The Incentive Temperature Potential (ITP) system recycles motor-cooling water into the spraying system, while the Jet Pipe system uses both cooling water and compressed air for dust suppression. The first MR341 is scheduled for delivery to New World Resources' 2.9-million mt/y CSM mine in the Czech Republic shortly, with a three-month trial scheduled for the second quarter of the year. The largest single component—the main frame—weighs around 7 mt, with a two-week underground assembly schedule possible with three-shift activity. www.sandvik.com need for ancillary cooling equipment; precision gear tooth profiles that reduce noise and maximize power transfer; an optimized, cast housing; and a unique flippable design with modular mounting options. Customers also benefit from the company's new three-year extended warranty package, which is available for any gearbox brand and model—even those of competitors—and provides access to David Brown's global network of service and repair centers. The extended warranty also covers new installations of gearboxes designed and manufactured by David Brown; and includes the option to install a remote conditioning monitoring system (CMaS) that gathers critical information while the gearbox is in operation, warding off the risk of unexpected failure. www.davidbrown.com Gearboxes Offer Performance Improvements for Mine Use Gear and drive specialist David Brown says its CX series gearboxes are designed to operate at extremely high defined levels of torque, speed, power and thermal ratings, exceeding competitor performance and representing a new, unique best-in-class model. According to the company, the advanced technologies designed into the CX series provide key product solutions for mining operations, including up to four times longer bearing life; up to 20% greater thermal capacity, reducing the March 2013 www.coalage.com 49