Spur gears are therefore only suitable for low circumferential speeds. This leads to relatively high noise levels. Since with spur gears the entire width of a tooth engages at the beginning of meshing, the force transmission also suddenly starts and abruptly breaks off at the end of meshing. Animation: Spur gear (enlarged animation) The more teeth are engaged at the same time, the lower the load for each tooth and the higher the power that can be transmitted. However, at least one tooth must always engage the mating gear to ensure continuous power transmission. With spur gears, up to three teeth mesh simultaneously with each other. Such a toothing can be produced very cost-efficiently by gear hobbing, gear planing or gear shaping. in the direction of the rotation axis, it is referred to as a spur gear or a straight-cut gear. If the teeth of a toothed gearwheel run in a straight line, i.e. In a spur gear, up to 3 teeth are in mesh at the same time. Straight-cut gears (spur gears) are the simplest type of toothing.
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