When was the first gas-powered chainsaw invented?
The first gasoline-powered chainsaws appeared in the late 1920s, though the exact "first" is debated because two German pioneers developed engines within a couple of years of each other. Published histories credit Emil Lerp, founder of Dolmar, with building the first petrol-driven chainsaw, the Type A, in 1927, and demonstrating it on Mount Wank in Bavaria. Andreas Stihl, whose name is now synonymous with chainsaws, patented and produced a gasoline-powered tree-felling machine in 1929.Earlier chainsaws did exist, but they were not gas-powered. Electric chainsaws and earlier chain-cutting tools date back to the 1920s and before, and Andreas Stihl also patented an electric chainsaw in 1926. What set the late-1920s gas machines apart was portability from an onboard engine rather than a power cable, even if "portable" still meant a machine so heavy it took two strong people to carry and operate.
The familiar one-person gas chainsaw is a much later development. It was the post-World War II era, with advances in lightweight aluminium alloys and smaller engines, that produced saws a single worker could handle. Through the 1950s, manufacturers including Stihl introduced progressively lighter models, and features such as anti-vibration mounts and the chain brake followed in the decades after, shaping the modern saw.
For how today's gas saws are chosen and used, see our gas chainsaw guide, and for how the major makers compare, our chainsaw brands guide traces Stihl, Husqvarna, and the rest to the present day. This is a summary of widely published history, not a claim of original research.
Why did early gas chainsaws need two people to operate?
Early gas chainsaws needed two people because the engines and materials of the 1920s were heavy, so the machines weighed as much as a small adult and were too unwieldy for one worker. One person guided the cutting bar while the other supported the engine end.The petrol engines of that era used cast iron and steel rather than the light alloys that came later, and the saws were built for felling large timber where brute cutting mattered more than portability. A two-person, or two-man, saw could weigh well over 100 pounds in its earliest forms, so it was operated a little like a powered version of the two-man crosscut saws it replaced. The weight was the central limitation, and shrinking it is essentially the story of the next thirty years of chainsaw development.
How did chainsaws become light enough for one person?
Chainsaws became one-person tools after World War II, when lightweight aluminium and magnesium alloys and smaller, more efficient engines let manufacturers cut the weight dramatically. By the 1950s a single worker could carry and run a saw that once took two.The war accelerated metallurgy and small-engine design, and those advances flowed straight into postwar chainsaws. Through the 1950s and 1960s, makers including Stihl and the North American manufacturers of the day introduced progressively lighter models, moving the chainsaw from a specialist logging machine to a tool a farmer or homeowner could own. Direct-drive designs replaced heavy gear reductions, and better carburettors let the saws run in any position. This steady weight reduction, more than any single invention, is what turned the chainsaw into the handheld tool recognised today.
What were the major milestones after the first gas chainsaw?
After the first gas saws, the major milestones were the shift to one-person saws in the 1950s, the anti-vibration mounts and automatic chain oiling of the 1960s, and the chain brake that became widespread through the 1970s. Each addressed a safety or comfort weakness of the early machines.The headline developments in chainsaw history are summarised below.
| Era | Milestone | Why it mattered |
|---|---|---|
| Late 1920s | First petrol chainsaws (Dolmar, Stihl) | Portable engine power replaced the power cable |
| 1950s | One-person gas saws | Light alloys and smaller engines made saws handheld |
| 1960s | Anti-vibration mounts, auto oilers | Cut fatigue and injury from vibration and manual oiling |
| 1970s | Widespread chain brakes | Stopped the chain on kickback, reducing serious injuries |
| 2000s onward | Cleaner engines, fuel injection, batteries | Lower emissions and the rise of cordless saws |
These milestones show the chainsaw evolving from a raw felling machine into a safer, lighter tool, a trajectory that continues today with the battery saws in our battery chainsaw guide.
Who invented the chainsaw, Stihl or Husqvarna?
Neither Stihl nor Husqvarna invented the chainsaw outright, though both shaped its history, since the German pioneers Emil Lerp of Dolmar and Andreas Stihl built the first practical petrol chainsaws in the late 1920s. Husqvarna, a much older Swedish company, entered chainsaw production later and became a leading maker rather than the original inventor.Andreas Stihl's 1929 gasoline saw and his 1926 electric saw put his name at the centre of early chainsaw history, which is why the brand is so associated with the tool. Husqvarna, founded centuries earlier as an arms maker, brought its engineering to chainsaws in the mid-twentieth century and grew into Stihl's main rival. For how the two compare as brands today, see our chainsaw brands guide.
