weedwhacker
A device used to cut grass and destroy weeds; a string trimmer.
weedwhacker: the string trimmer that clears edges
A weedwhacker is a handheld power tool that uses a rapidly spinning nylon string or filament to cut grass, weeds, and light brush at ground level. The string rotates at speeds between 3,000 and 8,000 rpm, depending on the motor type and engine displacement, creating a cutting edge through sheer velocity rather than a sharp blade. The tool excels at trimming grass around obstacles, along garden borders, and in areas where a lawnmower cannot reach.
Most weedwhackers use either a two-stroke gasoline engine, a four-stroke gasoline engine, or an electric motor powered by battery or corded mains. Gasoline models typically displace 25 to 33 cc and produce 0.5 to 1.5 kW. Battery models run from 18V to 56V lithium systems and suit light residential work. The cutting head houses a spool of nylon filament, usually 1.4 to 2.4 mm in diameter, which can be manually fed or automatically advanced as the string wears.
String material matters to performance and durability. Standard nylon melts or breaks under heavy use; commercial-grade copolymer blends resist heat and last longer. String diameter affects cutting power: thicker filament cuts denser weeds but consumes more fuel and generates higher vibration. The cutting swath typically ranges from 300 to 450 mm, making multiple passes necessary on wider areas.
Common wear and failure modes
String breakage is the most frequent problem, often caused by hitting rocks, logs, or fence posts. Fouled spark plugs plague fuel models when the ethanol in modern gasoline destabilizes fuel stored for weeks. Battery terminals corrode, reducing charge retention. The cutting head bearing wears quickly if impact loads are severe. Vibration isolation mounts on the handle deteriorate and allow uncomfortable resonance to reach the operator's hands and arms over extended use.
The term "weedwhacker" derives from the percussive action of the spinning string striking weeds and stems. The British call it a "strimmer" (from string trimmer), while North Americans favour the onomatopoetic "weedwhacker" or "weed whip." Industrial and municipal grounds crews treat it as a standard tool for edge finishing after mowing, and landscape contractors rely on models with shaft-drive transmission and commercial-grade fuel tanks for all-day operation.