AB Bolinder-Munktell (BM) was a tractor and machines manufacturer founded in Eskilstuna, Sweden in 1932 through the merger of the mechanical companies Bolinder and Munktell. Bolinder was a large marine engine builder that in the 1920s had 80 percent of the world engine market.
Bolinder are also well known as manufacturers of 'Semi-Diesel' or 'Hot bulb' engines.
The product range has changed with the times. Up to the beginning of the 20th century agricultural machines such as threshers were an important product.
Tractor production commenced in 1913, with the type 30-40. Tractors were the main product up to the 1970s, and gained an unsurpassed reputation for durability. During World War II, Bolinder-Munktell, at the request of the Swedish authorities, built Daimler Benz DB601 aeroplane engines under licence. An entire underground factory at Eskiltuna was built to accommodate this factory. Owing to the superior reliability of the Swedish-built engines the Swedish airforce issued instructions that for two-engined aircraft, at least one engine should be a Swedish built unit. From the 1950s new products in the construction equipment and forestry machinery categories emerged. These were initially based on the tractor chassis. Soon the construction equipment become the dominant product range and remains so today. Products developed in the 1960s and still in production are wheel loaders and articulated haulers.
Bolinder-Munktell traces its origins to the engineering workshops Munktells Mekaniska Verkstad (established in Eskilstuna in 1832) and J. & C.G. Bolinders Mekaniska Verkstad (established in Stockholm in 1845). In 1950 the main shareholder Handelsbanken sold its shares to Volvo who turned the company into a subsidiary.
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