At Superior Gearbox Company, we’ve manufactured high-quality gear drives for power transmission systems for over 45 years. One of our core product offerings is low input speed worm gear reducers.
Speed reducers—also referred to as gearboxes or gear reducers—are mechanical devices that serve two functions. The first function, as suggested by the name, is reducing the input speed so the output speed is appropriate for the application. The second function is multiplying the input torque provided by the power source. These functions are accomplished by employing a worm (a component that resembles a screw) and worm gear (a component similar to a spur gear). This design results in the input gear completing more rotations than the output gear in the same period, leading to decreased speed and increased torque.
To achieve greater torque from a transmission requires a reduction of speed. Speed reduction is the primary function of a worm gear speed reducer, ours, known as a Variodrive. A worm gear speed reducer consists of a worm pinion input and output worm gear oriented for perpendicular output, which produces a higher torque value in relation to the applied reduction ratio. The small diameter of the output gear allows the Variodrive to be used in applications where space is limited.
How Does a Worm Gear Reducer Work?
A worm pinion is a screw used to input power to the assembly. When coupled with a standard spur gear fitted with slightly angled teeth in a perpendicular alignment, known as a worm gear or worm wheel, the pairing becomes a worm gear reducer. As power from an engine or motor turns the worm pinion, its spirals push the teeth on the worm wheel, causing it to turn in accordance with the designed reduction ratio as it applies load to its drive shaft.
Higher reduction ratios may be achieved by increasing the circumference of the worm gear, or by increasing the number of threads on the worm pinion. Accomplishing the same reduction using conventional gear sets requires multiple reductions, which take up more space. Increasing the number of parts raising costs and adding to the risk of component failure.