Dive into the astonishing manufacturing process of rear axle shafts, where raw steel is transformed into a polished, high-performance product. Through intense forging, precise machining ...

is a forging operation that is performed with the help of a tool called mandrel. A mandrel is a blunt ended tool or rod that is used to enlarge or retain the cavity in a hollow metal product during ...

In number 22, Vol. XX., of the SCIENTIFIC AMERICAN, we discussed the method, hitherto in vogue, of forging shafts for sea-going steamers, from mixed scrap iron. We most decidedly disapproved the ...