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In 1991, Milwaukee released the Milwaukee Super Sawzall, a reciprocating saw with built-in counterbalance, a gear-protecting clutch, and five different patents. In the later 1990s, Milwaukee Electric Tool Corporation released a new range of miter saws and a lineup of 18-volt contractor cordless tools. [7]
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 most common types of power tools use electric motors. Internal combustion engines and compressed air are also commonly used. Tools directly driven by animal power are not generally considered power tools. Power tools can produce large amounts of particulates, including ultrafine particles. Airborne particulate matter is a Group 1 carcinogen.
Other important contributors to the modern chainsaw are Joseph Buford Cox and Andreas Stihl; the latter patented and developed an electric chainsaw for use on bucking sites in 1926 [13] and a gasoline-powered chainsaw in 1929, and founded a company to mass-produce them.
Some saws, usually electric saws intended for domestic garden use, shield this whole area from contact with a "tip protector". All cutting produces a reaction force on the saw: normally this should be the lower edge of the bar, where the chain is travelling towards the saw and the reaction tends to pull the saw safely towards the log, against ...
String trimmers powered by an internal combustion engine have the engine on the opposite end of the shaft from the cutting head, while electric string trimmers typically have an electric motor in the cutting head, but there are other arrangements, such as where the trimmer is connected to heavy machinery and powered by a hydraulic motor.
An electric brake is commonly used in corded tools such as circular saws, miter saws, routers, bandsaws, angle grinders, and more recently, table saws. These mechanisms are designed to prevent injuries resulting from things like kickback or skin-to-blade contact. The way these mechanisms work are almost universally the same; when the trigger or ...
In 1929, Andreas Stihl married Mia Giersch (1903-2002), [2] with whom he had four children, among them Hans Peter Stihl (born 1932) and Eva Mayr-Stihl (born 1935), who succeeded her father in managing the company and remaining Vorstand until 2002. [9] Stihl divorced his first wife in 1960, and married Hannelore Wegener-Doberg (1927-2009) the ...