[hrench]

Repeatedly people keep mentioning keeping chain tight, which is especially important for #25 chain.

I've looked for a COTs chain tensioner that works like the tensioning device for a chain-saw bar and never seen such an item sold. I want to be able to loosen a locking nut, tighten the chain with a screw, then re-tighten the locking nut.

Does someone make a COTS robot device that can move the axle forward or back by turning a screw? Motorcycles have a similar set-up.

If you google 'roller chain tensioner' you get mostly all idler-wheel add-ons.

This would be an easy item to design and offer for a vendor and for 'dead' axles, you'll have to buy two for each axle bolt that needs adjusted, so potentially, eight on a six-wheel robot. That adds up profit fast.