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. Compare with the traditional slew products, NFB slew drive is easy to mount and maintenance saves more space. Products can be widely used in heavy pallet transporter, container carrier, crane, solar tracker and new energy field.