Moottorisahat

Moottorisahat, or chainsaws in English, are portable, mechanical saws that cut with a rapidly reciprocating or rotating chain running over a guide bar. They are primarily powered by a small gasoline engine or an electric motor. The chain consists of a series of sharp teeth that remove material as they move, allowing for efficient cutting of wood.

The invention of the modern chainsaw is often attributed to Andreas Stihl and Emil Lerp in the 1920s. Early models were significantly heavier and more cumbersome than today's designs. Over time, advancements in engine technology, materials science, and ergonomics have made chainsaws lighter, more powerful, and safer to operate.

Moottorisahat are used in a wide variety of applications. They are indispensable tools in forestry for felling trees and cutting logs into manageable pieces. They are also employed in arboriculture for pruning trees and removing dead or diseased branches. In construction, chainsaws can be used for demolition, cutting formwork, and shaping wooden structures. Homeowners often use them for firewood preparation and yard maintenance.

Operating a chainsaw requires proper training and safety precautions. This includes wearing personal protective equipment such as a helmet with a visor, hearing protection, gloves, and chainsaw chaps. Understanding the machine's operation, kickback potential, and maintaining a stable stance are crucial for preventing accidents. Regular maintenance, including chain sharpening and tensioning, is also essential for both safety and performance.