So, for one of our off-season projects our team is manufacturing custom traction wheels out of delrin and plaction tread. I had heard that the best/easiest way to do this is imply to attach the tread to the delrin via. wood screws, but I’d like to get some additional input before we actually attempt this as it’s not something I’ve done before.
Could anyone with experience doing something like this offer some advice on how best to do it?
I would suggest tapping some holes in the delrin hub and fastening the tread with machine screws, like button head phillips or something that you can easily take in and out with a power drill. This is what we did this year with our 3d printed ABS wheels. Beats rivets when it comes to maintenance.
Agreed, either is fine, but by tapping the threads you get better threads and holding power, and gain re-usability well in excess of what self-tapping screws can provide. Plus machine screws have a wider variety of head profile available.
What Don and Chris both said. Don’s post also reminded me of my love for Delrin, it’s so nice to work with.
Back on topic though, should you ever see or feel the need, you can also look into installing threaded inserts into the wheel, either a knurled press in type insert or a riv-nut should work pretty well. Only way I can see you having issues with threading right into the delrin wheel is if you have to change tread frequently and use a drill. If you don’t start the threads by had (always start the threads by had) you could risk damaging/destroying the treads.
Reading through the posts, I was wondering what you guys would suggest to use for a head type. I was thinking a hex head tek screw wouldn’t be ideal because you’d have the bump sticking out from your wheel. This makes me think counter-sunk screws would be the best. However, since counter-sinking plaction tread would be pretty hard, would just plowing the screw into the tread until it’s level do? It just seems like head type could be an issue.