Magnetic coupling

This is a magnetic coupling concept that uses 10 of the Makerbot 3mm x 3mm x 3mm Neodymium magnets. These comes in handy when you need to couple two shafts together, but don't want to painstakingly axially align the shafts, within thousandths of an inch.

I measured the holding torque of the coupling, with the magnets inserted into the couplings in both attraction and repulsion. I used a digital torque meter and analog torque watch, until the coupling slipped and recorded the data below.

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