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The World’s Largest Motor Graders

Jun 13, 2019

The ACCO grader: the biggest ever


In 1980, the Italian Umberto Acco Company built the machine that to this day, holds the record as the world's largest motor grader. The ACCO grader was a monster, measuring over 7.3 metres and weighing 181,437 kilograms.

The ACCO grader included a blade over 9 metres long and a total of 12 tyres (two per hub). An engine at one end provided 1,000 horsepower, while a second engine at the other end provided 700 horsepower. The front and rear of the machine articulated separately.

The machine was built for a client in Libya, but was never delivered because of trading restrictions. Sadly, the world's biggest motor grader was left in Italy as no more than a curiosity for tourists, and it has now been dismantled for scrap.

Today's biggest motor graders

The world's largest surviving motor grader is Caterpillar 24H, launched in the United States in 1996 as part of the company's popular H-series line of graders. The Cat 24H is a little over 15 metres long, weighs 62,142 kilograms and includes a 7.3-metre moldboard.