Engineered with a classic four-point contact ball design, the SIG series allows each precision steel ball to maintain four stable contact points with the hardened gothic arch raceways under operating loads. This advanced structure enables the bearing to simultaneously withstand combined axial loads, radial loads and overturning moments, which greatly improves overall rigidity and load uniformity compared with conventional rotary bearings. Whether operating under continuous rotation, intermittent cycling or alternating load conditions, SIG internal gear slewing bearings minimize vibration, friction fluctuation and mechanical fatigue, ensuring consistent and dependable dynamic performance throughout their service life.

The SIG series features an integrated internal gear machined on the inner ring, bringing significant structural advantages for compact mechanical layouts. The precision involute gear teeth are manufactured with tight tolerance control and professional heat treatment, achieving low backlash, high meshing accuracy and steady torque transmission. Different from external gear models, the internal gear structure protects tooth surfaces from external impact, dust erosion and abrasive wear, while saving overall installation space and simplifying the drive system assembly. It perfectly matches standard drive pinions to realize quiet, efficient and maintenance-friendly power transmission for limited-space equipment designs.