Page 65: of Maritime Reporter Magazine (November 1998)

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M| ! horizontal pivot that permits verti- cal motion about its axis.

The vertical pin rotates on a large self-lubricating filament- wound Duralon non-metallic bear- ing, constructed from a filament- wound fiberglass epoxy resin matrix with a woven Teflon and polyester fiber bearing element, made by Rexnord Corporation. The bearing for the vertical pivot eye assembly is 15.625-in. I.D.

The assembly requires a mini- mum of lubrication to prevent the metal shafts from corroding. In service, they are subjected to ambi- ent temperature extremes from over 100 degrees F to -20 degrees

F or lower, plus some moisture and dust. In addition, the leverage of the long boom and loaded conveyor exerts complex and heavy forces on the bearings.

Circle 42 on Reader Service Card

Top: View from stern of Pathfinder, a tug-barge undergoing conversion at Bay Shipbuilding, shows support structure for boom at right, with hydraulic cylinder being installed. amn a

Why Cat engines? Because out here, surviving a rough day at the office requires more than a couple of aspirin,

I^^^IHBft .

Closeup shows dual-pivot cylinder mounting, which allows the boom to swing and elevate easily. Duralon bearings support the vertical pin.

Duralon bearing is shown during manufacture, after fiilament-winding operation that combines fiberglass epoxy resin matrix with a woven

Teflon and polyester fiber bearing element.

Cat Marine Engines are rated from 200-9600 bhp (150-7200 bkW) PATCDDII IAD

North America: 800-32 l-7332«Wor!dwide: 309-578-6298'Fax: 309-578-2559«E-mai!: CAT [email protected] UJ2J Clir ILLMH

Circle 382 on Reader Service Card 65 wea arn

In the case ot Lat engines, that would be the best des components and support available.

To learn more, hail us by phone, fax or e-mail. ( After all, rugged seas call for rugged engines

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