Keyed shaft connections are common, but they have their shortcomings. In reciprocating applications, keyways tend to concentrate stresses around the key. In a new video, we explore two alternatives that offer an even distribution of locking forces.


Your first keyless option, the locking assembly, installs between the shaft and its mating component. As you tighten the assembly, it expands radially—creating a robust compression fit between the shaft components. Your second alternative is the shrink disc. Once you place this device over the hub and shaft, simply tighten the locking screws. This draws the disc’s outer and inner thrust rings together—compressing the hub tightly around the shaft. Both keyless options make a difference in high-torque shaft applications—from packaging machines, to cranes and hoists. Watch our latest video to see locking assemblies and shrink discs in action.

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