How do you make surgical tubing roller

[RoboChair]

Originally Posted by Monochron

Wow, with a difference of .25 diameter I would have expected needing epoxy or something. We used Polyurethane tubing this year much closer in size to our roller and ended up needing epoxy.

Not 0.25" over, 0.25" interference fit. 1 inch ID rubber tube onto 1.25" OD aluminum tube.

[Monochron]

Originally Posted by RoboChair

Not 0.25" over, 0.25" interference fit. 1 inch ID rubber tube onto 1.25" OD aluminum tube.

Ah, my reading comprehension needs some work

[FarmerJohn]

Originally Posted by RoboChair

Not 0.25" over, 0.25" interference fit. 1 inch ID rubber tube onto 1.25" OD aluminum tube.

Did you find that this method changed the OD at all?

[RoboChair]

Originally Posted by FarmerJohn

Did you find that this method changed the OD at all?

It probably ended up between 1.625" and 1.700" OD overall, I'm not actually sure what it came out to. But it was for sure smaller than 1.75"

[AllenGregoryIV]

Here is the exact latex tubing we used.

http://www.mcmaster.com/#5234k91/=13a807t

This is the aluminum tubing we used.

https://www.zoro.com/value-brand-tub...f7/i/G3344862/

[Mike Schreiber]

Alternative method that is somewhat questionable.

We used a bicycle inner tube for our shooter this year - not the same as intake but equally difficult to attach.

We used the air method to get the inner tube over a piece of aluminum tube slightly larger than the un-stretched tube. We then rolled the tube up into a ring and removed it then used a 6 jaw lathe chuck to stretch the entire tube at once until we could fit the 4" aluminum drum in the middle of the chuck and roll the tube onto it.

Bicycle inner tube works really well, but you need to clean it with something that will get rid of the powder. We used soap and water before it was on and then wiped with a rag with brake cleaner applied since it eats away the top surface of the rubber it will make it nice and sticky.

[IKE]

I have used the warm lightly soapy water technique for sliding grippy hose material onto an aluminum tube roller.

I have also used this technique to install AndyMark collector stars which have a 0.5" square hole onto a 0.75" square shaft. The warm lightly soapy water causes the rubber to expand a little bit, and slide freely on the metal. Once dry, the pieces grip very tightly and do not more.

For mini-bot rollers, I know on a couple of them we used the regulated air and nozzle technique to install surgical subbing on shafts.