Gear couplings are a subcategory of shaft couplings but look very much like gears, which is why the word was incorporated into their title. It reminds me of the wolf from Little Red Riding Hood, hiding in Grandma’s clothes to trick the little girl so he could eat her up. Gear couplings are nowhere near as dangerous as wolves in pajamas, though they are known for their very large spindle teeth that so resemble the teeth of a gear. Rather then eating up little girls and grandmas, gear couplings connect two shafts together in automatic systems, most commonly within car operations having to do with brakes and wheels.

The teeth of a gear coupling are what connect them to the two shafts on either end and are also the characteristic that allow them to transmit torque from one shaft to another effectively and efficiently. Particularly when incorporated into automotive designs, the gear coupling is what allows a car to brake fast or speed up the movement of the wheels. It is a very small but vital piece to the whole automotive system, which does not just include residentially owned cars but farming equipment, public transportation systems and some automated industrial machines.

Another important aspect to how gear couplings function is their vibration absorption, which makes traveling much more comfortable for humans riding within a vehicle as well as protecting the structure of the vehicle from undue stress thus extending its working life. In essence, a gear coupling is set up much like universal joints, although a few distinguishing characteristics do exist. Anyways, a gear coupling has a shaft in the center of itself, which is where the two shafts it is connecting meet up and are able to firmly connect the big teeth of the gears on either side. The way gear couplings are connected to the shafts also allows them to correct misalignment when it occurs, thanks to those very large gear teeth.