Torsional Rigidity is the amount of torque (twisting) that a radial shaft can take during rotation. You can envision torque as the twisting force created when wringing out a washcloth—each hand wrings in the opposite direction, just as a structural member under rotation along a longitudinal axis will tend to twist in opposite directions. As shaft-driven systems are a basic mechanical component, torsional stiffness must be taken into account when designing everything from pocket watches to industrial equipment, including gearboxes.
In gearboxes, the drive shaft must have enough torsional rigidity to resist the external torque of the system. Inside a radial shaft, there will be more torque as we move away from the fixed end of the shaft, and more torque at the diameter than at the center of the shaft. Torsional stiffness is measured in torque (in Nm) per radian (degree of twist).
The Roles of Torsional Rigidity in Industrial Manufacturing
–To maintain the structural integrity of the system while also transmitting force.
–To maintain grip while tolerating some shaft displacement.
–To adjust vibrational frequencies. Adjusting the torsional rigidity can change the system’s vibrations. By tuning torsional rigidity, engineers can dampen noise and optimize operation.
Different applications demand different amounts of torsional rigidity. Servo systems require zero backlash and high torsional rigidity.
Falk Freedom Disc Couplings: Reliable Torsional Rigidity
If you’re looking for steadfast torsional rigidity, Falk Freedom Disc Couplings are for you. These one-piece units provide zero-backlash and dependable torsional rigidity. The stainless steel disc pack makes installation a snap, and Falk Freedom Disc Couplings are virtually maintenance free–no need to lubricate, for ideal continuous service. Falk Freedom Disc Couplings can be used in many different applications, including pumps, compressors, extruders, fans, and blowers. Falk Freedom Disc Couplings accommodate torques from 700 to 44,000 pounds-inch, and bores from 1.125 to 5.000 inches.
For assistance in selecting a torsional rigidity for your application, give us a call. With decades of experience in industrial manufacturing, Mar-Dustrial’s team members can assist you in choosing the best coupling for your needs.
Posted under Machinery Maintenance, Tips and Tricks on Thursday, August 13th, 2015