Why Does a Coupling Hub Crack? Causes and Prevention

A coupling hub crack is the most serious single damage finding in a coupling inspection — and the one that requires the most unambiguous response. Unlike a worn elastomeric element (which degrades predictably and provides warning time) or a loose bolt (which can be...

What Is the Correct Torque for Coupling Bolts?

Coupling bolt torque is one of the most overlooked specifications in coupling installation and maintenance. In the rush to reassemble after a coupling repair, bolts are frequently tightened by feel rather than by torque wrench — and the feel method is unreliable by a...