1114 and 2056's shooter wheels

[T^2]

Originally Posted by Cash4587

One more thing, how much compression was typically run with these wheels on the disks?

We ran ours with about 1/4" to 1/2" of compression. At speed, they noticeably increase in diameter as the urethane stretches (which is why you shouldn't run them at extremely high speeds -- we blew two of them open at the Sacramento Regional). However, in practice the frisbee buckled upward much more than the urethane compressed.

[Holtzman]

They are in fact 2477K36. We used them both this year and last year with some success. They also seem to have gained reasonably popularity with a number of teams by Champs. I saw 254, 973, 1717, 1678, and probably some others all using them.

Don't spin them over 10,000rpm. Bad things happen. 5-6k rpm

Originally Posted by Cash4587

I noticed that 1114 and 2056 used some blue shooter wheels that seemed to work really well. I just wanted to know if anybody else used them and had any idea what there were. I think they are a McMaster-Carr buy but there are so many products on that site that some things are a little hard to find if you are looking for something specific. If there is any one that can help it is much appreciated!

[Racer26]

Inquiring minds want to know:

How are 1114 and 2056 getting their hands on McMaster parts? I've tried to order from them before, and they just tell me they won't ship to anyone who isn't an existing customer in Canada.

Are they getting IFI, or some friendly american team to buy for them?

[Holtzman]

We've had a McMaster Carr account since 2007. This must have been before their policy not to accept new Canadian customers. Their customer service is second to none. My advice would be to email them explaining your situation(being a highschool team, exposing future engineers to their company, blah, blah, blah), and ask them to open an account for you.

Either that or find a local company that already has an account and doesn't mind sliding a few parts in with their orders.

Originally Posted by Racer26

Inquiring minds want to know:

How are 1114 and 2056 getting their hands on McMaster parts? I've tried to order from them before, and they just tell me they won't ship to anyone who isn't an existing customer in Canada.

Are they getting IFI, or some friendly american team to buy for them?

[Racer26]

Ah. I figured that might be the case for 1114, was unsure when the ban on new Canadian accounts started, but it seems like it was somewhere in the neighborhood of 2009 from what I can find based on Canadians complaining on online forums about it.

[pfreivald]

Does anyone happen to have a weight on these wheels?

[E_puello]

our rookie team was able to create an account and put orders out.
we have had some of our orders denied when we set the shipping address to a mentors house, but when we ship it to the school there are no problems.

[Patriot]

Originally Posted by Racer26

Ah. I figured that might be the case for 1114, was unsure when the ban on new Canadian accounts started, but it seems like it was somewhere in the neighborhood of 2009 from what I can find based on Canadians complaining on online forums about it.

Actually our first order was refused because we were not a long standing Canadian Customer. So I ordered and shipped to a US mail box once. Then the next fall tried again, and voila, we were a long standing Canadian customer and have had our orders delivered to the school next day ever since.

[mman1506]

apparently if you state that the order is going to a school address for FIRST robotics it will go through.

[Cash4587]

So is there not a best compression to the disks? Or is it 1/2in to a 1/4in?

[Cory]

Originally Posted by Cash4587

So is there not a best compression to the disks? Or is it 1/2in to a 1/4in?

You're going to have to try it and see. It's completely dependent on what the surface opposite the wheel is. There's no shortcut for testing it yourself.

[Cash4587]

Originally Posted by Cory

You're going to have to try it and see. It's completely dependent on what the surface opposite the wheel is. There's no shortcut for testing it yourself.

Sweet thanks for the info! I am trying to get access to my teams parts and robot.. They are both in a chemistry closet right now We are going to test them soon though.

[AllenGregoryIV]

Anyone try these with a cut down version of the WCP colson hub? It looks like the OD of the hub might be a bit to small but I'm not sure.

[MichaelBick]

Originally Posted by AllenGregoryIV

Anyone try these with a cut down version of the WCP colson hub? It looks like the OD of the hub might be a bit to small but I'm not sure.

We haven't, but it should be super easy to make a hub. You turn down 1.375" or 1.5" stock a bit, bore, and then cutoff. Later you broach. Assuming you have a lathe and arbor press it is super easy to do.

[thefro526]

Originally Posted by Cory

You can turn them on a lathe with a properly ground, very sharp HSS tool.

Ah, good to know. At the Championship, we were trying to come up with a quick fix for an encoder disk (previous wheel had a piece of retro reflective tape on the hub) and discovered that the wheels are really tough to work with.

Originally Posted by AllenGregoryIV

Anyone try these with a cut down version of the WCP colson hub? It looks like the OD of the hub might be a bit to small but I'm not sure.

Originally Posted by AllenGregoryIV

Rather a large assumptions for the majority of FRC teams. We'll probably be calling in a favor or two to get a few made for us before IRI.

Having made hubs for both Colsons and these Urethane Wheels, I can say that the hubs are similar, but a hub made for a colson would be too small for the urethane wheel. If you really wanted to, you could sleeve the urethane wheel with a piece of 1.25" (nominal) tubing that's somewhere around 1/32" wall and probably make something work, but at that point, it might be more prudent to just make hubs that are the correct OD.

I have a drawing somewhere of the hubs that we're running in our urethane wheels, if you need it/it'll help expedite getting them made in time for IRI, shoot me a PM.