How to choose the external gear slewing drive or the internal gear slewing drive?

The slewing drives designed and produced by U-TRSM can be divided into external gear slewing drives and internal gear slewing drives, how to choose these two types of slewing drives mainly depends on the requirements of the transmission system and the actual application scenarios, the following are a few considerations summarized by U-TRSM for your reference.

Transmission efficiency and structural compactness

External gear slewing drives usually have low transmission efficiency and relatively loose structure with large clearance and friction losses, but are relatively simple and low cost to design and manufacture.

The internal gear slewing drive structure is more compact and has higher transmission efficiency. The machining and installation of internal gear meshing gears are relatively difficult and costly.

Application and load requirements

The external gear slewing drives are suitable for low speed, large scale, high torque transmissions, and can withstand large loads and shocks.

The internal gear slewing drives are suitable for high speed, small and high precision applications. Due to the high contact stresses on the tooth surfaces, the internal gear meshing requires better lubrication and accuracy.

Space limitations

Internal gear slewing drives are more suitable for compact mechanisms and can achieve transmission actions in a smaller space.

Vibration and noise

External gear slewing drives have relatively low noise and vibration, and are suitable for low noise and smooth transmission applications.

Internal gear slewing drives may generate high vibration and noise due to their compact construction and high tooth contact stresses.

The choice of external gear or internal gear slewing drive needs to be based on the specific transmission requirements and use of the occasion. Our design engineers have a wealth of experience and technology, according to your actual situation to recommend you a better quality solution.