Power-to-Weight Ratio: Power divided by weight measures how much power a chainsaw can produce per pound. The larger the number the better. Min | Max: Indicates the minimum, and maximum recommended bar lengths. Wet/Dry Weight: The weight of the chainsaw’s power head with and without fuel and bar oil. HP “Horsepower”: Measurement of the engine’s potential power, calculated by multiplying the amount of force (in pounds) by the speed (in feet per second). Unless you have extensive experience and training, stay within the manufacturer’s specifications. Combined with the shorter bar’s reduced weight and length, the saw will be more unpredictable and susceptible to kickback. A saw running a bar that is too small will have increased torque and chain speed making it hard to control.Additionally, the added weight and length will change the balance point of the saw increasing user fatigue and the chance of an accident. Using a chainsaw with a bar that is too long reduces the torque and chain speed making it cut less efficiently. Due to the high chain speed of 5 meters per second, the cutting speed and performance of the chainsaw are phenomenal.It is possible to use a smaller or larger bar than specified, but this can result in excessive component wear, poor cutting performance, too much power, and increased opportunities for accidents to happen. Most chainsaw manufacturers publish the minimum, maximum, and recommended bar lengths for each of their chainsaw power heads. During this process, only one or two cutters engage in the wood at a given time and the chain will jam. Kickback often occurs when cutting with the nose of the saw. This does not give the operator time to react. If kickback occurs, it will be over within 2/10 of a second. Please refer to Husqvarna's documentation before making a purchase decision. When cutting, the chain is traveling about 65 feet persecond. All data is as reported by Husqvarna and is subject to change. So read your owner’s manual, and respect the saw.Husqvarna gas chainsaw powerhead comparison table including wet and dry power-to-weight ratio, wet and dry weights, and min-max guide bar lengths. Your chainsaw’s most important safety feature is you. If the saw does kick back, or hits something, or just starts vibrating a little too much, use the emergency stopping feature. Don’t cut more than one log or branch at a time.Be sure to check around the area you’ll be cutting before cutting.īesides the tips above, here are a few more ways to stay safe while cutting: If your saw hits a branch on the other end of the wood, or even a nail, it can yank the saw forward and away from you. PULL-IN KICKBACK (Something’s in the wood).If the chain gets pinched on either side by the wood being cut, the whole saw can get pushed back at you, full speed. LINEAR KICKBACK (Don’t pinch the chain).That’s why standing to the left is a good idea. To avoid it, never touch the upper tip of the saw to any object – otherwise the saw gets kicked back, straight at you. Cuts buttery branches with a super-fast chain speed of 26.2 feet per second, greatly increasing your productivity. Rotational kickback is the most common, and the most dangerous. The faster the chain, the faster the cut. ROTATIONAL KICKBACK (Don’t touch the tip).Kickback happens when the chain’s rotational energy gets thrown back at you, and you lose control of the saw. After cutting, the engine and muffler can stay hot for up to 10 minutes, so put the saw where children and pets can’t get to it.Release the throttle control as soon as you’re done, and let the saw come to a complete stop.Maintain pressure until the end of the cut, then ease up to finish.With the saw running at full speed, press against the wood with firm, steady pressure.Stand off to the left in case of kickback (which we’ll cover down below). There is in fact fairly common agreement that for general work, the tooth should be moving somewhere around 130 to 170 feet per second.Right hand on rear handle, arm slightly bent. 325 pitch chain would only be traveling at 51. Left hand in front with thumb wrapped around handle, arm straight, elbow locked. 3,780,000 inches per hour / 12 inches per foot 315,000 feet per hour Almost 60 miles per hour Note that. And if you’re felling a whole tree, wear a hard hat.
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