A Matter of Millimeters – No Room to Spare
A Matter of Millimeters – No Room to Spare
2 Pages! WORLDWIDE IN-SITU MACHINING SERVICES A MATTER OF MILLIMETERS – NO ROOM TO SPARE ANNEALING SAVES MAIN ENGINE CRANKSHAFT FOR OWNER AFTER FAILED ATTEMPT TO MACHINE AWAY THE HARDNESS Resistance to new repair methods can prove costly. A bulk carrier operator almost learned this lesson when they chose a traditional machining method to address excessive hardness. The 13-year-old bulker’s main engine, an MAN B&W 6S50MC-C, suffered a lube oil failure resulting in heavy damage to crankpin #6. Goltens advised that the journal could, and should, be rectified by annealing and machining. Goltens believed that the hardness would extend below the rated diameter of the journal and that traditional methods to machine below the hardness would result in a condemned c
