Learn the Basics of Jaw Coupling Technology
Jaw couplings are made of two jaw coupling hubs that press fit onto a jaw coupling spider and are a three-piece assembly. On the center of the spider's limbs, the press-fit concentrates its force and it allows the coupling to operate with zero backlashes In servo-driven systems, jaw couplings are commonly used that too with high acceleration and deceleration curves where there is a requirement of precise motion control and a low inertia balanced design is required.
According to elastomeric elements transmit torque between driving and a driven hub the classification of all elastomeric couplings is done but the elements are either in compression or shear.
In jaw couplings, in compression between the jaws of mating hubs, the element is loaded. The operation of jaws is done in the same plane, with the driving hub jaws pushing toward the driven hub jaws. Jaw couplings are widely used.
But in shear-type couplings, the operation of driving and driven hubs is done in separate planes, in which the driving hub pulls the driven hub with the help of an elastomeric element suspended between them. You will find different jaw coupling wholesale around you.
Capabilities
In four areas compression type couplings offer you benefits: torsional stiffness, safety, load capacity, and easy installation. At first, all elastomers especially synthetic rubber has higher load capacity in compression when compared to shear.
Second, compared to shear types, compression types offer more torsional stiffness (less twist between hubs) with few versions closely approaching the very stiff characteristic of metallic couplings. Between the motor and driven machines, the backlash is minimized by this high torsional stiffness. For each incremental movement of the driving shaft, it offers the near-equal movement of the driven shaft which is among the important factors in certain conveyor and pump applications.
Third, jaw couplings are fail-safe: even if the spider breaks the coupling can still operate. At a convenient time, the jaw coupling supplier can thus replace the spider, which in downtime can prevent critical systems. Only for this reason, in a well-designed and manufactured coupling, the jaws withstand several times the coupling's torque rating.
