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Andreas Stihl designed and hand built his first chainsaw in 1926. [5] The saw was electrically powered, and weighed about 48 kg (106 lb). [6] Stihl grew slowly initially, as the chainsaws came to the market about the same time as the Great Depression; with manpower cheap, and old two-man saws proven, there was no need for power saws.
The following year, Stihl created the first ever chainsaw that could be operated by only one person. [7] The company continued to grow and in 1931 it became the first European company to export chainsaws to the United States and the Soviet Union. [8] Stihl has been the biggest chainsaw manufacturing company in the world since 1971. [2]
The first electric chainsaw was invented by Stihl in 1926. [21] Corded chainsaws became available for sale to the public from the 1960s onwards, [ 22 ] but these were never as successful commercially as the older gas-powered type due to limited range, dependency upon the presence of an electrical socket , plus the health and safety risk of the ...
Knife and scissor grinder sharpening a knife on a water-cooled grinding wheel, 2018.. A scissor grinder (German: Scherenschleifer), sometimes also scissor and knife grinder or knife and scissor grinder, for short also knife grinder, is a craftsman who sharpens and repairs blunt knives, scissors and other cutting tools.
This has two distinct advantages over scratcher chain – it enables the use of fewer cutters per unit length of chain, which allows for shorter downtime for sharpening, and produces a more "open" chain layout, allowing far better clearance of chips and debris from the kerf. Individual depth gauges on each tooth also enable the use of skip chain.
The term is based on the word "whet", which means to sharpen a blade, [3] [4] not on the word "wet". The verb nowadays to describe the process of using a sharpening stone for a knife is simply to sharpen, but the older term to whet is still sometimes used, though so rare in this sense that it is no longer mentioned in, for example, the Oxford Living Dictionaries.