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But after that, the A220 gets very different from its relations. On the normal skid-steer, the wheels are powered though an axle shaft driven off the chain standbygeneratorcalculation case, with bearing support on both the inside and outside of the chain case. On the A220, the axle is supported by a single Torrington spherical roller bearing mounted in the chain case housing.The Bobcat-built axle shaft is splined to a specially designed standbygeneratorcalculation single cardan, lubed-for-life Mentor U-joint housed within a cast iron hub and swivel housing cast by Grede. The hub section incorporates a pair of Timken bearings on the outer hub, along with a Purvis shaft seal. "Our main bearings that carry all the load are standbygeneratorcalculation in the outer hub portion," said Krause. "And that''s where all the weight of the machine is carried, which is why we only need the single bearing on the other end, because none of that weight is actually transferred into the axle back there." 1625DE; Pumps--three Emsco FB-1,600 Triplex;Prime movers--four Cat. 3S126-B, Tech PowerSCR; Rotary Table--37 1/2"; Pipe Handling System--VarcoIron Roughneck; Top Drive--Varco TDS-3.DERRICK: 160'' Lee C. Moore; 1,000,000-lb hook ad.BOP SYSTEM: One 27 1/2" nom. Regan KFDJdiverter; one Hydril GK 13 5/8", 5,000 psi; Two CIW13 5/8", 10,000 psi double.CRANES: Three LeTourneau PCM-120 AS.WORK AREA: Gulf of Mexico.OCEAN NUGGETRIG DESIGN: Modified Levingston Class IIICONSTRUCTION: Levingston Shipbuilding Co., ©2003 www.standbygenerator.net. All rights reserved. |