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Difference between Ball screw and trapezoidal screw

2020-06-27

1. Transmission efficiency

The transmission efficiency of the ball screw is about 90~96%, and the transmission efficiency of the trapezoidal screw is about 26~46%. That is, if the same large load is driven, a ball screw can use a smaller drive power, such as a smaller power motor, which can reduce costs and energy consumption.

2. Transmission speed

The ball screw has rolling friction, and the trapezoidal screw has sliding friction. The temperature rise of the former is much lower than that of the latter during work, so it can undertake high-speed transmission tasks.

3. Service life

The surface damage of rolling friction is much smaller than that of sliding friction. Therefore, when the conditions of cleaning and lubrication are met, the maintenance life of the ball screw is much higher than that of the trapezoidal screw.

4. Self-locking

Self-locking is generally inversely proportional to the transmission efficiency. Therefore, the ball screw has almost no self-locking, while the trapezoidal screw has a certain degree of self-locking (depending on the size of the lead angle and the roughness of the working surface).

5. Economy

Because of its structure is more complex than that of the trapezoidal screw, the price of the ball screw is still higher than that of the trapezoidal screw. However, with the increase in automation equipment and the increase in output, the price difference is getting smaller and smaller

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