Quote:
Originally Posted by JesseK
Thanks for the responses! The CAD will clear some things up, but the idea is to attach the 2 box tubings along their 1" faces. The bolt will not go through the entire thing; instead only the two touching faces will be bolted -- like what Jim described in his last sentence. The bolt itself wouldn't be longer than 1/2".
The countersink is for chain clearance so the chain (or belt) doesn't rub against the bolt head if it jerks while slightly loose. The sprocket & chain will be housed within the 2x1. Other solutions are low-head machine bolts and/or simply putting teflon over the bolt head. Or I could put the chain elsewhere, but the new location is part of the potential improvement.
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Is this a west coast style drivetrain? What are the advantages of moving the chain inside?
We (and many others) have run nearly identical chain placement tucked inside (as in adjacent, inside the driveframe but not the tubing) the 2x1 for seasons without any failure. If you look at 60, 254, 968, 1538 (and now 1323) and us, the number of drivetrains using that configuration including practice bots is probably above 60 among those teams. Thousands of hours of runtime as well.
I'm not saying it's a bad design without even looking at it, I just don't see what potential advantage internal chain has aside from being "protected". The cost of putting chain internal seem huge to me as well in terms of assembly and risk.