mtd log splitter

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One potential source of serious injury in grinding comes from an oversight that is easy to make: operating the wheel in an over-speed condition. While a wheel that is run far enough in excess of its rated maximum speed may shatter within minutes of operation, danger may also result from a wheel run just slightly faster than its rated speed. This less severe over-speed condition can cause the wheel to be damaged, and the damage may result in breakage after further use. For example, operating a reinforced, 9-inch diameter, Type 27 wheel rated for a maximum speed of 6,600 rpm on a 7-inch angle grinder with a speed of 7,700 rpm can cause the wheel to crack. This cracking can lead to breakage later. Any of these actions sets up a disastrous scenario that could lead to an accident involving serious injury or death.

DERRICK: 147''; 1,044,000-lb hook load capacity.BOP SYSTEM: One 13 5/8", 5,000-psi annular; two13 5/8", 10,000-psi double ram type; Regan KFDJ diverter.CRANES: Two Link Belt 218A, 33 t @ 30''.MOORING: Four 10,000-lb anchors, four anchorwinches and four 2,500'' lines.REMARKS: Formerly Arethusa Heritage.WORK AREA: Indonesia.OCEAN SOVEREIGNCONSTRUCTION: Far East Levingston Shipyard, Singapore, 1981.REMARKS: Formerly Arethusa Sovereign.BOP SYSTEM: One 21,", 2,000'' psi annular diverter.DRILLING EQUIPMENT: Prime movers--five Cat. D-399; Top Drive--Varco

Pump it up"Centrifugal pumps have become more robust, with much tighter tolerances and stress analyses of components to increase efficiency and machine time to failure," according to Bruce Smith, North American sales manager for Fristam Pumps Inc., Middleton, Wis. Shaft deflection that results in moving parts hitting stationary components in the pump is a major contributor to pump failure, and manufacturers are addressing that concern.Liquid ring pumps are coming into play in the industry as an alternative to standard centrifugal pumps, adds Smith. Although these scavenger pumps have been around for a quarter of a century, pharmaceutical manufacturers have embraced the technology and forced redesigns that have expanded their applications. Liquid ring pumps are particularly adept at handling fluids with entrained air, an issue with cream, which tends to foam during transit. Liquid ring pumps do a superior job in fully evacuating a tank, a material-savings advantage that appeals to ice cream manufacturers and liquid egg processors, according to Smith. Pump improvements have been accelerated with the application of computational fluid dynamics (CFD) software, points out Russell Jones, business development manager-pumps for Alfa Laval in Pleasant Prairie, Wis. "From an R&D point of view, CFD is a big advance in optimizing design and increasing pump efficiency," he says. The technology has been instrumental in boosting pump efficiencies from the 40 percent range to 60 to 70 percent in recent years.

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