by ep | Jul 13, 2026 | Selection Guides
Every motor-driven machine produces torsional vibration. The motor produces cyclic torque ripple at the electrical supply frequency and its harmonics. The pump or compressor produces pressure pulsations that appear as torsional excitation. The VSD, if fitted, produces...
by ep | Jul 13, 2026 | Flange Coupling Guides
The chain coupling is one of the oldest flexible coupling designs still in widespread industrial use ¡ª for good reason. Its ability to transmit high torque from a compact, robust assembly, and its tolerance of moderate misalignment, make it the coupling of choice for...
by ep | Jul 13, 2026 | Maintenance
A coupling hub that will not come off a shaft is one of the most frustrating and time-consuming problems in rotating machinery maintenance. What should be a 30-minute coupling replacement turns into a multi-hour or multi-day extraction exercise, delaying pump, motor,...
by ep | Jul 13, 2026 | Flange Coupling Guides
The service factor is the single most important number in coupling selection ¡ª more important than the nominal torque, more important than the bore diameter, and more important than the coupling type. It is the multiplier that translates the calculated running torque...
by ep | Jul 13, 2026 | Troubleshooting
A noisy coupling is a communicating coupling ¡ª it is telling you something specific about the condition of the drivetrain or the installation. The mistake most maintenance teams make is to accept coupling noise as a normal operating characteristic and defer...
