Why Does a Wet Grinder Use a Smaller Motor Than a Mixer Grinder?

If you've ever used both a wet grinder and a mixer grinder, you might have noticed a surprising difference: the wet grinder runs on a much smaller motor, yet it handles large quantities of soaked grains with ease. So, why is that?


The answer lies in the design and functionality of these two kitchen appliances.

Wet Grinder: Built for Slow and Heavy Grinding

A wet grinder is specially designed for making batters — like those used for dosa, idli, or vada. It uses granite stones that rotate slowly over a base, grinding soaked grains with a gentle, rolling action. This traditional method requires high torque (rotational force), but not high speed. That's why most wet grinders come with low-wattage motors ranging between 150 to 250 watts.

What makes wet grinders unique is their ability to operate for long periods without overheating. The slow grinding process produces minimal heat, preserving the flavor, texture, and nutrients of the food.

Mixer Grinder: Designed for Speed and Power

In contrast, a mixer grinder is meant for quick tasks — like blending, pureeing, or dry grinding spices. It uses high-speed stainless steel blades that spin at 15,000 to 20,000 RPM. To achieve such speeds, mixer grinders require powerful motors, typically ranging from 500 to 1000 watts.

These high-speed operations make mixer grinders efficient for short bursts of activity, but they tend to heat up quickly, making them unsuitable for preparing thick batters over long durations.

The Bottom Line

  • Wet Grinders use low-wattage, high-torque motors for slow and consistent grinding.

  • Mixer Grinders use high-wattage, high-speed motors for fast processing.

Both are built for different needs — one excels in traditional batter-making, and the other in modern kitchen convenience.

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