My team plans on using a chain drive for our arms this year but we are missing a part that we can’t seem to find the name of. We are trying to connect a sliding mechanism to the chain with a hard/ rigid connection without breaking the loop, I think it would look something like a U-bolt but with some special design that would keep it from moving. If anyone knows what this is called that would be great. Thanks!!!
How about this?
“Roller Chain Attachment Links”
Otherwise we’ve bolted right through the chain using the largest possible bolt. 4-40 for #25 chain and 8-32 for #35 chain if memory serves.
You’re probably looking for something like this guy:
3946 has also used 1/4" bolts with some shank. We’d cut off the heads, hammer the shanks a few taps (to .185") so they fit inside #25 chain outer plates, then drilled a hole for a #25 pin (.091", we’d usually use 3/32"), and used a #25 chain splicer such as the Dark Soul Chain Tool (I understand Vex now markets such a tool, but haven’t used it). Then, we’d put 1/4" holes in brackets mounted on the moving part, and we’d not only have a mount which allowed chain to pull evenly, but enabled easy chain tensioning.
(Full Disclosure: inspired by my old garage door opener. A COTS solution now available from West Coast Products.)
Something like THIS?
They also have one for #35 chain.
The roller chain attachment links are exactly what I was looking for, if that doesn’t work out I’ll definitely try the bolt ideas. Thanks for everybody’s help.