slew drive is a new kind of slew products. It consists of worm, slewing ring, housing, motor and so on. Because the core part is slewing ring, so slew drive can also bear axial, radial loading and titling moment at the same time.

Slewing drives usually come with different applications. For instance, according to the raceway diameter of the slewing ring, a slewing drive can be classified into WD-080, WD-0130, WD-0170, WD-0223, WD-0343, WD-0419, WD-0478, and WD-0625 series, etc. in the international market. In the model, W and D refer to Worm and Drive respectively.

In China, most slewing drive manufacturers divide slewing drive into SE3, SE5, SE7, SE9, SE12, SE14, SE17, SE21, and SE25 series, etc. In the model, S and E refer to slewing and enclose respectively and the number refers to the raceway diameter of the slewing ring in inch.