Chainsaw Terminology: A MowShop Guide Chainsaws are indispensable tools. Whether you’re a first-time chainsaw owner or looking to upgrade your equipment, understanding the technical terms associated with chainsaws will allow you to make more informed decisions and maintain your tool efficiently. This guide breaks down key chainsaw jargon from A to Z. A Air Filter: Chainsaws produce a lot of sawdust, which can clog the air filter. Regular cleaning is essential to ensure optimal performance. A dirty filter can cause sputtering or even engine failure. Spare filters are inexpensive and a smart backup to keep on hand. Anti-Vibration System (AVS): Designed to reduce strain on your wrists, arms, and shoulders, AVS features springs and dampers that isolate the handles from the engine. This makes longer cutting sessions more manageable and reduces fatigue. Automatic Chain Oiling: Most chainsaws come with an automatic chain oiling system that lubricates the chain and guide bar. This reduces overheating, prevents rust, and extends the life of your tool. Ensure oil lines and lubrication holes are clear of sawdust for smooth operation. B Bumper Spikes (Felling Dogs): Small spiked bars at the base of the guide bar, these provide stability by gripping the wood during cutting. They’re typically made of metal or plastic and are particularly useful for felling trees. C Centrifugal Clutch: This clutch disengages the chain when the engine is idling, preventing unnecessary movement. It only engages once the engine reaches a certain speed, reducing strain and allowing for smoother operation. Chain: The chainsaw chain loops around the guide bar and consists of cutter links, drive links, and tie straps. Keeping the chain sharp is critical for efficient cutting; if sharpening feels daunting, visit a professional service centre. Chain Brake: A vital safety feature integrated into the top handle. The chain brake stops the chain’s motion during kickback, protecting the user and reducing the risk of injury. Chain Catcher: A small hook designed to catch the chain if it breaks or slips off the guide bar, enhancing safety. Chain Tensioning: Proper chain tension is crucial for safe operation. Some chainsaws have tool-free tensioning systems, while others require a spanner or multi-tool for adjustments. Always check tension before use. Chock: A wedge or block used to control the direction of a tree’s fall or to stabilise logs during cutting. Chocks are available in wood, plastic, or metal, with tapered designs for versatility. D Drive Link: Found on the bottom of the chain, drive links fit into the guide bar’s groove. Always count the drive links when purchasing replacement chains to ensure compatibility. G Gauge: Refers to the thickness of the chain’s drive links. Matching the gauge to your guide bar is essential when replacing a chain. Thicker gauges are more durable, while thinner ones are suited for lighter tasks. Guide Bar: The metal bar around which the chain moves. Shorter bars are ideal for pruning and light tasks, while longer bars handle thicker logs and tree trunks. H Hunting: When the engine surges or “hunts,” it’s usually indicative of a fuel issue. Regular maintenance and clean fuel lines can help prevent this problem. Check out our Chainsaw Maintenance Guide for troubleshooting tips. K Kickback: A sudden upward motion of the guide bar when it encounters resistance. Kickback is one of the most common chainsaw hazards. Modern chainsaws are equipped with chain brakes and tip guards to mitigate this risk. Proper training is essential for safe use. M Muffler: This component reduces engine noise and back pressure, making the chainsaw more comfortable to use. O Oil Reservoir: Holds the oil used for lubricating the chain and guide bar. Regularly check and refill the reservoir to ensure smooth operation and prevent wear. P Pitch: The pitch measures the distance between three consecutive drive links divided by two. Choosing the right pitch is essential for replacement chains. Mini-pitch chains are preferred for their reduced vibration and kickback. S Safety Throttle: A switch on the rear handle that prevents accidental start-ups. This must be pressed alongside the throttle for the chain to engage. Scabbard: A plastic cover for the guide bar, protecting the chain and preventing injuries during storage or transport. T Tip Guard: Fitted to the end of the guide bar, tip guards reduce kickback but may limit advanced cutting techniques like boring cuts. W Wedge: Similar to a chock, wedges are used for directing tree falls or stabilising logs. They’re an invaluable accessory for felling and splitting tasks. Looking for a new chainsaw? Browse our range of high quality chainsaws here and find the perfect tool for your needs.
