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Does a Small Gear Driving a Large Gear Speed Up or Slow Down?

1 Answers

LilyRose

07/30/25 12:21am

A small gear driving a large gear results in a reduction in speed. When a small gear drives a large gear, the rotational speed decreases, which is based on the principle of gear ratio. When two gears of different diameters mesh and rotate together, the larger diameter gear naturally turns slower than the smaller one. The speed ratio is inversely proportional to the gear diameters. Below are the specific functions of gear engagement: 1. Changing speed or torque: There are many gears in the transmission and drivetrain. The gears in the transmission are used to change speed and torque, while the main reduction gear in the differential reduces speed and increases torque. 2. Power transmission: Gears serve a power transmission function. Many four-wheel-drive vehicles have numerous gears in the transfer case, which facilitate power transmission. The main reduction gear in the differential also aids in power transmission. Many gears transmit power by meshing with each other. Gears in the steering system also contribute to power transmission. 3. Achieving gear ratios: Different gear combinations in the transmission enable various gear ratios, allowing the vehicle to adapt to different driving conditions.

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