From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Advertisement for TOCCO-hardened crankshafts highlighting their longevity and cost-saving benefits.
| Identifier | ExFiles\Box 132\4\ scan0050 | |
| Date | 8th January 1937 guessed | |
| ONE HUNDRED THOUSAND MILES WITHOUT A BEARING ADJUSTMENT! TOCCO The illustration above shows a TOCCO-hardening installation designed and built for a leading truck manufacturer. At the right a crankshaft is shown in position for hardening pin bearings—with the inductor blocks open. At left inductor blocks for hardening main bearings are closed, ready for the heating cycle. TOCCO-HARDENED CRANKSHAFTS CUT OPERATING COSTS Operators of large fleets of trucks and buses are reporting remarkable savings in maintenance expense on all vehicles powered by engines with TOCCO-hardened shafts. Truck and engine builders, using the new patented TOCCO PROCESS, say the following reports from their customers are typical: “100,000 miles without a bearing adjustment!” “Oil pressure gauge reading has not dropped at all in 80,000 miles, indicating no crankshaft wear.” “Oil consumption same as a new engine after 75,000 miles, due to original bearing clearances and perfect condition of TOCCO-hardened crankshaft journals.” “Former mileage period before regrinding crankshafts increased four times.” “Maintenance of ‘new engine’ rate of oil throw-off from crankshaft eliminates increasing carbon and piston ring troubles—which usually develop as crankshaft wears out-of-round or undersize.” “Permissible engine operating speeds stepped up ten to twenty per cent by use of harder bearing metals on TOCCO-hardened crankshafts without danger of pounding out or burning out connecting rod big ends.” From these statements any operator of truck or bus fleets can quickly figure what his own savings in maintenance and operating costs would be if all his engines had TOCCO-hardened shafts. INSIST ON THE LONG-WEARING TOCCO-HARDENED CRANKSHAFTS THE OHIO CRANKSHAFT CO. Cleveland, Ohio | ||