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Hi Timoose, thanks for the input and the information, lesson learnt. Regarding your options, balancing the shaft in field with weights on the OD could have been possible at quarter points but i am not confident enough in the methodology and the DAQ sytem required, would you be able to share a...

Hi walt thanks for the response, i think you are right we are operating near resonance, honestly i was expecting this to be lower than the calculated but the balancing machine shows there is phase change at ~700RPM and the calcualted critical speed is 2000RPM. In the end we have chosen to...

Hi hope anyone can help I have encountered a problem during the commission of a back to back test rig for industrial gearboxes. The test rig is of mechanical type so the driveline is looped by means of two transfer boxes connected by a long tube, actually two tubes. The operating speed of...

Hello, I am required to design a large spline coupling. having two external splines housed inside an internal spline (ring gear) The coupling is required to carry loads in one direction and is not subject to torque reversals. The spline joint will be diametre centered and has the following...