11-16-2015, 03:19 AM
Thanks all. I had looked into most of those ideas already. The hardware store wheels tend to be expensive... if I want the final product to have $5-10 in parts per vehicle.
For the axles, right now I'm leaning towards something like http://www.mcmaster.com/#90034a051/=ztu5aa and then I can cut them to length. I'll put http://www.mcmaster.com/#90631a009/=ztu640 on the ends. That's about 35ยข for one car. Then maybe something like this to run the rod through and mount to the chassis http://www.mcmaster.com/#corner-brackets/=ztu7zh though, I don't think those holes are big enough and they'd add about $2 per vehicle.
I could try a straight steel rod, but I'd need to find something to put on the ends to keep the wheels on http://www.mcmaster.com/#8920k115/=ztub0t
Or I could get rubber tires and they'd just stay on, like these http://www.ebay.com/itm/Meccano-Erector-...51d2c4aed0 but I can only find about a dozen on ebay, and I need 40+
For the axles, right now I'm leaning towards something like http://www.mcmaster.com/#90034a051/=ztu5aa and then I can cut them to length. I'll put http://www.mcmaster.com/#90631a009/=ztu640 on the ends. That's about 35ยข for one car. Then maybe something like this to run the rod through and mount to the chassis http://www.mcmaster.com/#corner-brackets/=ztu7zh though, I don't think those holes are big enough and they'd add about $2 per vehicle.
I could try a straight steel rod, but I'd need to find something to put on the ends to keep the wheels on http://www.mcmaster.com/#8920k115/=ztub0t
Or I could get rubber tires and they'd just stay on, like these http://www.ebay.com/itm/Meccano-Erector-...51d2c4aed0 but I can only find about a dozen on ebay, and I need 40+