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Petamentor Motor Joint Remix — image 1
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Petamentor Motor Joint Remix

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A redesign of the Petamentor motor joint coupling that sandwiches the motor shaft with a washer to make it more durable.

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Other Ideas
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I encountered slippage issues between the 12V 7RPM spool winding motor's shaft and the PETG/PLA motor joint as the plastic was not strong enough to handle the torque and it would yield after a short period in a high friction system like mine.

To counter this I added a slot for a ≤ø12mm 1.5mm thick washer to aid in pressure dispersal which has made a significant difference in the durability of the coupling as the flat side of the shaft is now pressed against the washer and not the soft plastic.
1x M3 nut and a <20mm M3 bolt are still needed as the shaft needs to be clamped down onto the washer.

Feel free to suggest any possible improvements for this remix.