Self-locking Mechanisms in Slewing Gearboxes

Self-locking Mechanisms in Slewing Gearboxes


Slewing gearboxes are essentially used to turn heavy loads at low speed. They are typically used in construction equipment, cranes, and wind turbines. A slewing gearbox is composed of a motor, gearbox, and slewing bearing.

The importance of self-locking mechanisms

Self-locking mechanisms are important in slewing gearboxes to prevent the load from moving when the gearbox is not active. Self-locking mechanisms are essential in applications where the loads are stationary for long periods of time. They are also used to prevent the load from moving in the event of a gearbox failure.

The role of worm gears in self-locking mechanisms

Worm gears are commonly used in self-locking mechanisms in slewing gearboxes. Worm gears are manufactured to have a high lead angle, which results in a low friction ratio. The low friction ratio allows for the transmission of torque from the motor to the load, while also providing the necessary self-locking ability.

The role of bevel gears in self-locking mechanisms

Bevel gears are also used in self-locking mechanisms in slewing gearboxes. Bevel gears have a large surface area, which allows for a high torque transmission. The teeth of bevel gears are cut at an angle, which allows for a smooth transfer of power from the motor to the load. Bevel gears are often used in conjunction with worm gears to provide added self-locking ability.


Self-locking mechanisms are an important feature in slewing gearboxes, and they are necessary to prevent unwanted movement of loads. Worm gears and bevel gears are commonly used in self-locking mechanisms, and they provide the necessary high torque transmission and low friction ratio required for this application.

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Planetary Gearbox/Reducer Purchasing Guide

Factor Parameter Description
Load Characteristics Load Torque The torque required to move the load
Load Inertia The resistance of the load to rotational acceleration
Performance Requirements Efficiency The ratio of output power to input power
Operating Temperature The maximum and minimum expected temperatures of the application
Service Life The expected lifespan of the gearbox under normal operating conditions
Environmental Factors Environmental Conditions The temperature, humidity, and other environmental factors of the application
Mounting Orientation The position of the gearbox in the application

Author: Miya