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AB
Reviewed in the United States on May 12, 2023
Hello, on the surface this shaft coupling appears to be nicely constructed. I used this coupling to connect the output of a 1/4” motor shaft to a 3/8” shaft for a small motor dyno design. As the motor RPM was increased, I notice excessive vibration coming from the assembly. The shafting was supported by 3 bearing blocks which were aligned during assembly, so not the root cause of the vibration. Next, I checked the coupler during rotation and noticed that it was vibrating during rotation causing the entire assembly to vibrate. After disassembling the motor from the dyno, I sighted down the inner holes and noticed that both ends were NOT aligned with each other. The misalignment was so excessive, causing the coupler to flex to extremes during operation. I purchased a new coupling from Heli-Cal and the vibration disappeared.
Shane Holland
Reviewed in the United States on December 30, 2019
Nice coupler. Works.
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