The speed ratio (also known as the transmission ratio) of a worm gear reducer.

　　The speed ratio (also known as the transmission ratio) of a worm gear reducer is the ratio of the input speed to the output speed. Calculating the speed ratio is crucial for understanding the reducer’s performance and selecting an appropriate unit. The formula for calculating the speed ratio is:

　　Gear ratio = Input speed / Output speed

　　In a worm gear reducer, the speed ratio is primarily determined by the number of teeth on the worm wheel and the worm. The speed ratio is the ratio of the number of teeth on the worm wheel to the number of teeth on the worm. If the worm is single‑start (i.e., one complete turn of the worm corresponds to one tooth rotation of the worm wheel), the speed ratio equals the number of teeth on the worm wheel. If the worm is multi‑start, the speed ratio is the number of teeth on the worm wheel divided by the number of starts on the worm.

　　Specifically, for the calculation, you can follow these steps:

　　Determine the number of teeth on the worm wheel and the worm: denote the number of teeth on the worm wheel as Z2, and the number of teeth (or starts) on the worm as Z1.

　　Apply the speed ratio formula: speed ratio i = Z2 / Z1.

　　For example, if a worm gear has 20 teeth and its mating worm has one start (or one thread), the gear ratio is 20:1. This means the worm gear’s rotational speed is 1/20th that of the worm.

　　It should be noted that, in practical applications, factors such as the gearbox’s efficiency and friction losses must also be taken into account, as these can affect the actual output speed and gear ratio. Therefore, when selecting and using a worm‑gear reducer, it is advisable to refer to the manufacturer’s data and performance curves.

　　The efficiency calculation of a worm gear reducer involves multiple factors, including the reducer’s design, manufacturing quality, operating conditions, and lubrication status. Efficiency is a key performance indicator that measures the reducer’s energy conversion effectiveness during operation, reflecting the ratio between input power and output power.

　　In general, the efficiency of a worm gear reducer can be calculated using the following formula:

　　Efficiency = (Output Power / Input Power) × 100%

　　However, in practical applications, due to various losses—such as friction loss, lubrication loss, and aerodynamic drag—the output power is typically lower than the input power. Consequently, the efficiency is always less than 100%.

　　To calculate the efficiency of a worm gear reducer more accurately, it is necessary to account for specific losses and may require experimental testing. Manufacturers typically provide rated efficiency data for their reducers; these values are determined under specified conditions and can serve as a reference during selection and operation.

　　In practical applications, to ensure the efficient operation of worm gear reducers, regular maintenance and lubrication are essential to minimize friction losses and enhance transmission efficiency. Additionally, selecting the appropriate reducer model and specifications, along with adhering to suitable operating conditions, are key measures for improving efficiency.

　　The lubrication methods for worm gear reducers mainly include the following:

　　No translatable content — contains a zero-width non-joiner (invisible character). Original: "\u200c" Oil-immersed lubrication : Immerse the entire transmission system in lubricant; suitable for high-speed applications and heavy-load transmissions.

　　No translatable content — contains a zero-width non-joiner (invisible character). Original: "\u200c" Oil seal lubrication : An oil seal is installed between the worm shaft and the gearbox to prevent lubricant leakage, making it suitable for applications requiring a high degree of sealing.

　　No translatable content — contains a zero-width non-joiner (invisible character). Original: "\u200c" Circulating lubrication : The lubrication system circulates lubricant to the friction surfaces within the transmission system, making it suitable for worm gear drives operating continuously over extended periods.

　　No translatable content — contains a zero-width non-joiner (invisible character). Original: "\u200c" Grease lubrication : Apply grease to the mating surfaces of the worm gear and worm to form a lubricating film; suitable for worm gear drives operating at low speeds and under light loads.

　　No translatable content — contains a zero-width non-joiner (invisible character). Original: "\u200c" Splash lubrication : Lubricating oil is splashed onto the meshing area of the worm and worm wheel via an oil splash device, providing lubrication and cooling.

　　No translatable content — contains a zero-width non-joiner (invisible character). Original: "\u200c" Forced lubrication : Lubricant is delivered to the meshing zone of the worm and worm wheel via a lubrication pump, making it suitable for high-power, high-speed, and heavy-load worm gear drives.