![]() Higher torque holds keeps the head spinning better in tough cutting situations, even when its highest RPMs are lower than low-torque gearing. Even though trimming grass seems like a low-demand task, grass does push back against the line, causing it to bend back and eventually start to bog the motor. Just keep in mind that line diameter has a direct effect on runtime-thicker line takes more power to run.įinally, a motor with higher torque helps the trimmer resist slowing down as the going gets tougher. If you have tougher grass or deal with overgrowth frequently, a string trimmer with 0.105-inch line lets you power through even better. We recommend 0.095-inch for the best all-around performance. Most cordless string trimmers take 0.080-inch line at a minimum. It’s like the difference between getting hit by a 175-pound safety and a 225-pound linebacker at the same speed. Shifting the focus to the line thickness, the higher the line mass, the more force it’s able to cut through thicker grass with. The top models are capable of hitting 6500 RPM and there is a significant difference in how fast you can complete your trimming duties at higher rotational speeds. As long as you’re getting at least 5000 RPM, you should be in good shape. Most battery-powered string trimmers are fine in this category. ![]() The faster the line whips around, the better the tips cut grass. Three primary factors go into cutting power: line speed, line thickness/mass, and motor torque. Find a Stihl Dealer Best Battery-Powered String Trimmer Buying Guide | What We Look For Cutting Power ![]()
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