The Chainsaw: A Reliable Tool for Tree Work

 Chainsaws have become an indispensable tool for cutting trees and thick vegetation in forests, farms and yards. The chainsaw was invented in the late 18th century and since then it has evolved into an extremely powerful yet versatile equipment. In this article, we will explore the different aspects of chainsaws including its history, modern features, uses and safety guidelines.

History of the Chainsaw

The earliest form of chainsaw was invented in 1831 by two American inventors - Samuel J. Harper and Christopher Schultz. Their saw consisted of a chain of links fitted with cutting blades. However, it was not suited as a practical chainsaw as it was powered manually. The chainsaw as we know today was developed in the late 1920s by German engineer Andreas Stihl. His chainsaw had an engine attached to it to power the cutting chain instead of manual power. In the following decades, chainsaws became increasingly popular and manufacturers incorporated features like vibration dampening, automatic chain oiling and chain brakes for improved handling and safety. Today, companies like Stihl, Husqvarna, Makita and Poulan dominate the chainsaw market worldwide.

Major Features of Modern Chainsaws
Most Chainsaws today run on gas-powered two-stroke engines ranging from 35cc to 120cc displacement. The cutting chain circulates around a guide bar attached to the engine housing. Features like automatic chain tensioning, vibration isolation and kickback brakes have made chainsaws easier to control. Electronic ignition and fuel injection have also improved starting reliability. Chainsaws suited for professional forestry work can weigh over 30 pounds with bar lengths up to 36 inches. Lighter home-owner models are also available weighing 8-15 pounds with bars usually 14-20 inches long.

Chainsaw Uses in Tree Work and Farming
Chainsaws excel at cutting through thick woody vegetation too large and dense for hand tools. Tree services and arborists depend on chainsaws for pruning limbs, removing hazardous trees and firewood harvesting. In forestry, they aid in tasks like thinning stands, clearing areas after tree falls and biomass harvesting. Farmers use chainsaws for cutting fence posts, firewood and clearing fields. Landscapers also utilize chainsaws for shaping hedges, clearing brush and storm cleanup work. Chainsaws are unmatched whenever heavy cutting of wood is required quickly over large areas. Their lightweight and powerful cutting ability make them a go-to tool for all tree professionals and outdoor workers.

Safety Guidelines for Operating a Chainsaw
While chainsaws vastly simplify manual cutting jobs, they can also pose risks if not handled properly. Some key safety practices to follow include - wearing proper safety gear like chainsaw chaps/leggings, gloves, ear/eye protection and steel toe boots. Ensure the chainsaw is serviced regularly and in good working condition with a sharp chain, tight fitting guide bar and no fuel/oil leaks. Use only the recommended fuel/oil ratio and don't refuel a running or hot saw. Keep the chain sharp using a file, as a dull chain increases kickback risk. Hold the saw firmly with both hands during cutting and watch out for branches under tension. Know how to react properly in case of kickback by letting go of the trigger and not fighting the saw's movement. Chainsaws should only be operated by trained individuals per manufacturer guidelines. Always cut with the saw below waist level for best control. Following proper safety techniques is essential to avoid chainsaw injuries while getting the job done efficiently.

Maintenance and Chain Replacement
To keep chainsaws running smoothly, some regular maintenance checks must be performed. These include tightening any loose nuts/bolts, cleaning air filters, inspecting/topping up chain oil levels and fuel filters. It's recommended to replace the spark plug every 50 hours of use. Chains get dull and worn out over time which reduces cutting efficiency and increases risks. Most manufacturers suggest replacing chains once the depth gauge wear exceeds .025 inches or every 3-6 months on heavy use saws. Proper sharpening can extend chain life but it's best to replace completely when links show abnormal stretching/wear. Replacing the chain with one recommended for the saw model and bar length will restore maximum performance.

Chainsaw Models for Homeowners vs Professionals
While the basic functions are same, key areas where consumer and professional chainsaws differ are - power, weight, vibration control, serviceability and safety features. Homeowner models in the 34-50cc displacement range focus more on ease of use, having lower kickback risk, vibration isolation and overall lighter builds. Bar lengths are usually 14-18 inches. Professional saws weigh over 10lbs as they offer more power from 60-120cc engines, larger fuel/bar capacities and heavy duty construction for intense continuous use. Advanced anti-vibration mounts, automatic oiling and chain brake kickback systems add to their safety. Though upfront costs are higher, serious arborists rely on brands like Stihl MS 661 Magnum and Husqvarna 572 XP saws for their supreme power-to-weight ratios and durability.

Conclusion
With its superior ability to cut virtually any tree or woody growth briskly, the chainsaw has established itself as a necessary tool across forestry, landscaping and agricultural sectors over the past century. While posing some risks, modern chainsaws incorporating improved safety mechanisms have made tree cutting/pruning much safer than manual methods. Following manufacturer guidelines on operation, maintenance and protective equipment ensures users can maximize chainsaws' benefits whilst avoiding harm. Their evolution continues with goals of boosting efficiency, reducing emissions and weight for an all-round better user experience.