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Unread 01-28-2002, 10:08 PM
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2" Bore Piston Threads

Can anyone share with me some information about 2" bore pistons?

Specifically, I'd like to know what type of thread is found on them - both on the end of the housing as well as the rod. We'd like to use this thread to mount the piston to our chassis (rather than the supplied hardware) but I have no idea what type of tap to get, or where I'd even find a tap that large.

Any help would be very, very appreciated
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Unread 01-29-2002, 06:51 AM
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Exclamation Pneumatic Piston Info

The info on the threads can be found in the "Pneumatic Manual for FIRST 2002 Competition" that was furnished in the kit.

The 2" cylinder uses 1-1/4" - 12 UNF for the mounting points at the nose and pivot end.

The Rod uses 1/2 - 20 UNF.

A 1-1/4" - 12 UNF Tap is expensive. It may be better to bore a clearence hole and use a 1-1/4" - 12 UNF nut.

(we need smiles of various stages of sleep deprivation)
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Unread 01-29-2002, 01:38 PM
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RTFM, eh?

Quote:
Originally posted by Ed Sparks
The info on the threads can be found in the "Pneumatic Manual for FIRST 2002 Competition" that was furnished in the kit.

The 2" cylinder uses 1-1/4" - 12 UNF for the mounting points at the nose and pivot end.

The Rod uses 1/2 - 20 UNF.

A 1-1/4" - 12 UNF Tap is expensive. It may be better to bore a clearence hole and use a 1-1/4" - 12 UNF nut.

(we need smiles of various stages of sleep deprivation)
Read the manual, huh? Novel concept

Thanks Ed. . . I didn't have a manual handy when I posted, and I knew I'd forget to find out if I didn't write it down somewhere
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Unread 01-29-2002, 04:02 PM
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Exclamation or RT_WS .......

Sorry Michael,

I wasn't trying to be a jerk (It's sleep deprivation time again).

Anyway, the info is also posted on FIRST's web site.

Pneumatics Manual

RT_WS (fill in your own choice)
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Unread 01-29-2002, 05:44 PM
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Another question, if I may... does anyone know the force we can side-load those pneumatics at before we run into trouble (IE, burst seals, and bend shafts)? I know they really aren't ment for it, but they ought to be able to take a little... I hope?
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Unread 01-29-2002, 07:55 PM
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Talking Thank You! Thank You!

Ok, I have been struggling for days (ok, hours) to figure out all the dimension stuff on this Piston!!!!!!!!! And now I have found it! Yeah!

Don't mind me.

BTW, where exactly in the manual is this?
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Unread 01-29-2002, 08:39 PM
Lloyd Burns Lloyd Burns is offline
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Ppage 9-11 of the Pneumatics Manual for cylinder dimensions. see Ed's earlier post to download the .pdf which is also useful for printing out fax order forms.
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Unread 01-29-2002, 09:35 PM
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Re: or RT_WS .......

Quote:
Originally posted by Ed Sparks
Sorry Michael,

I wasn't trying to be a jerk (It's sleep deprivation time again).

Anyway, the info is also posted on FIRST's web site.

Pneumatics Manual

RT_WS (fill in your own choice)
You weren't being a jerk at all, Ed I just felt a bit stupid for not checking with the manual first is all. I feel like I've been through it so many times I really should have seen it at one point or another.

I'm sorry if I made it sound that way.
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