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Drybox 50mm Axles - Improved

Improved bearing fit and part strength at the cost of longer prints
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updated April 19, 2025

Description

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The bearing interface on the original model allowed the bearings to press too far into the hub, allowing the flange to rub on the arms and adding drag. Further, the overhang in the bearing area would cause spaghetti, and pressing in the bearing carefully by hand (especially on the male part) would frequently cause layer line separation and part failure. I redid the bearing interface with a step + gradual slope, I also added in flange supports to strengthen the part and prevent layer separation and part fatigue. It does notably take longer to print, but you can probably modify it down a bit. That said, I wanted to print it once and be done.

 

The bearings can be a touch tighter, so whack it with a mallet to get it in.

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Model origin

The author remixed this model.

Differences of the remix compared to the original

The bearing interface on the original model allowed the bearings to press too far into the hub, allowing the flange to rub on the arms and adding drag. Further, the overhang in the bearing area would cause spaghetti, and pressing in the bearing carefully by hand (especially on the male part) would frequently cause layer line separation and part failure. I redid the bearing interface with a step + gradual slope, I also added in flange supports to strengthen the part and prevent layer separation and part fatigue. It does notably take longer to print, but you can probably modify it down a bit. That said, I wanted to print it once and be done.

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