Name of this COTS part?
 

What is the name of this part? This seems to be a bolt, with a free-spinning bearing on its head. Also, is this available on McMaster?

I am trying to design an elevator, and these seem to be very useful when it comes to designing!

Thanks.

Re: Name of this COTS part?
 

Cam follower, and yes they are available on McMaster.

Re: Name of this COTS part?
 

I'm not sure what those are called, but you might want to look into making your own bearing blocks for a linear elevator. It tends to be a lot cheaper, but still very smooth and easy to build.

Re: Name of this COTS part?
 

Yeah, those two parts are cam followers. I found them on McMaster a month or two ago and had the exact same thought, that they would be great on an elevator. They're a bit spendy though, at about $20 a piece. You can always go with regular bearings on shoulder screws if cost is a issue.

By the way, I really like that assembly. I assume it was designed for a third stage which would interface with C-channel?

Re: Name of this COTS part?
 

Yep, that's exactly what it is for. I'm redesigning this carriage to be a little more adaptable to any given game. I may start to post CAD files of my mechanisms and drive trains on FRC Design and on our website.

Re: Name of this COTS part?
 

For anyone concerned about cost, shoulder bolts aren't even necessary. We use standard cap screws with great results.