Pneumatic cylinder size
 

Yes, we were just wondering what the max diameter size is on the pneumatic cylinders. We want to know if we are allowed to use a 3" diameter, or if that is too large.

Re: Pneumatic cylinder size
 

By the new FIRST update, you are only allowed to use pneumatic cylinders with a largest bore of 2". That still has a force of about 180 pounds.

Re: Pneumatic cylinder size
 

The only cylinders you can use are those listed on the cylinder order form. No 3" cylinder listed = you cannot use one.

Don

Re: Pneumatic cylinder size
 

I have looked for the documentation on the pneumatic rules but cannot seem to find anything restricting the use of a 3" cylinder. Can some one post a link to where I can find this information.

Re: Pneumatic cylinder size
 

can't give documentation but I do know that you are only allowed pnematics that have been ordered from a FIRST supplier. (Bimba, Parker, etc.) and none of them will give you a 3" bore. why would you need it anyways?? It seems pretty overkill to me. Why not use two 2" bores?

Re: Pneumatic cylinder size
 

You can only order cylinders in sizes listed on the form that is the last page of the pneumatic manual:

http://www2.usfirst.org/2007comp/oth...s%20Manual.pdf

Avaliable bores are 3/4", 1.5" and 2".

Re: Pneumatic cylinder size
 

Bolding added for emphasis.

From the Pneumatics Components Order form (last page of the pneumatics manual), we see that only the following size & bore combinations are legal.

3/4" Bore: 0.5", 1", 1.5", 2", 2.5", 3", 4", 5", 6", 8", 10" strokes
1.5" Bore: 0.5", 1", 1.5", 2", 2.5", 3", 4", 5", 6", 7", 8", 9", 10", 11" strokes
2" Bore: 0.5", 1", 1.5", 2", 2.5", 3", 4", 5", 6", 7", 8", 9", 10", 12", 24" strokes

Re: Pneumatic cylinder size
 

alright thanks for the posts. Looks like were gunna have to get a new cylinder.

Re: Pneumatic cylinder size
 

Be warned to keep an eye on cylinders your people are using. I didn't realize until after it was ordered that a subgroup bought a couple of 2" bore by THIRTEEN inch stroke cylinders.

Bimba makes them to order at the time you request them (they don't STOCK them). Therefore, not only can't we use them, they are UNRETURNABLE!

That error cost us several hundred dollars! :ahh: (I guess we'll be using them for pneumatics training now...)

BTW... That's another thing to note - even if you specify "overnight shipping" on the cylinder order form, be aware that it does NOT mean you'll get them the next day! Their manufacturing is a first-come-first-served queue. Depending on their backlog, it can take them up to several days to MAKE the cylinders for you. (So, plan ahead!!)

However, you can check the "order status" online, and it'll show you when they'll make and ship your cylinders. You use your team number as the PO number, and the Ship-To's zip code to pull up the detail sheet on your order.

Note though that making Oernight can still a good idea. Although it may take them a day oor two to make your cylinder order, NOT specifying overnight means they'll go by Ground, which can take quite a while to arrive!

- Keith McClary
Chief Engineer, Tean 1502 "Technical Difficulties"

"I've had to advise on Pneumatics so long it's becoming my religion... I'm now the 'Ecpneumatical Counsel'..."