Sliding axle tension system

[ChrisH]

Originally Posted by Al Skierkiewicz

Remember that the forces on the cross screws are greatest when the tensioner is receiving forces from the chain in motion. You may not bend the screws while tensioning but I bet you will in a pushing match with another robot. BTW, nice looking design and CAD work.

I agree with Al on this. But there is one other thing to consider. Screws need at least three threads worth of engagement to develop full strength, four is better. The hex shaped piece does not look to have enough thickness to have full engagement. You should also check the fastener lengths to ensure you are using a standard size.

Other than that it looks pretty good. By the way, it is customary in the design world to have others review your work as you are doing now. When your design decisions are questioned during the review process it is because the reviewers want to help you do a good job and have things turn out the way you want. So please do not be offended by any comments that you may disagree with.

Also, since all we are looking at is a picture, it is hard to tell the actual size of things. A few dimensions would help us evaluate just how much this design can take.