At DandehTarash Industrial Group, we have the knowledge and years of experience to meet our customers’ external and internal Couplings needs. Couplings are the ridges or teeth (external spline) on a drive shaft that mesh with an equal number of like ridges or teeth (internal spline) in a mating piece with the purpose of transferring torque from one member to the other. External splines are manufactured in a number of ways. They may be shaped, hobbed or ground. Internal splines can be manufactured in shaped due to accessibility restrictions. Whether your order is large or small in volume, our gear manufacturing network is well-equipped to satisfy your most rigorous external or internal spline cutting demands.