Though one may not think of gears to be flexible, gear couplings are extremely much considered to be a flexible coupling. A gear coupling is usually a mechanical gadget designed to transmit torque between two shafts that aren’t collinear. The coupling typically includes two versatile joints, one fixed to each shaft. These joints tend to be connected by a third shaft called the spindle.

Each joint generally includes a 1:1 equipment ratio internal/external gear pair. The tooth flanks and outer size of the external equipment are crowned to allow for angular displacement between the two gears. Mechanically, the gears are equivalent to rotating splines with modified profiles. They are called gears because of the relatively huge size of the teeth. Gear couplings are generally limited by angular misalignments of 4 to 5°.

Equipment couplings ordinarily come in two variations, flanged sleeve and continuous sleeve. Flanged gear couplings contain short sleeves surrounded by a perpendicular flange. One sleeve is normally placed on each shaft so the two flanges fall into line in person. A number of screws or bolts in the flanges hold them collectively. Continuous sleeve gear couplings feature shaft ends coupled jointly and abutted against each other, which are then enveloped by a sleeve. Generally, these sleeves are constructed with metal, but they can also be manufactured from Nylon.

Single joint equipment couplings are accustomed to connect two nominally coaxial shafts. In this application these devices is named a gear-type versatile, or flexible coupling. The solitary joint allows for minor misalignments such as installation errors and adjustments in shaft alignment because of operating circumstances. These kinds of gear couplings are generally limited to angular misalignments of 1/4 to 1/2°.