We are currently working on prototypes using versaroller free spinning on hex, but are having durability issues connecting them to pulleys. The current solution uses the 3D printed plugs as shown below to connect the roller to an integrated pulley. Each side has a hex bearing that allows it to spin. The issue we are having is that these will often shear at high speeds, and we are looking for a more durable solution. Are there any off the shelf parts for this? Or is there an alternative method for doing the same thing? Thanks!
Check out Thriftybot’s tube roller solutions: Tube Rollers
They have a solution for both live and dead axle setups, with the dead axle (what you’re trying to do, I believe) having an integrated pulley, very similar to what you’ve tried printing, but probably much more durable!
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I’d second TTB’s solution. Doesn’t shock me that a 3DP plug would fail there; the way most people would print that plug would have layers separate. And I don’t see a good way to reinforce it short of printing in a more advanced filament (and even then that’s a question mark).
Awesome, thank you both! We are trying printing some with layers going the other way as a temporary, but will definitely check out the TTB ones!
You might also take a look at 2910’s 2023 public build binder and CAD for ideas. They used a dead axle design on their wristed intake.
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