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Old 11-23-2012, 02:17 AM   #8711 (permalink)
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if you use loctite you'll be fine. even if you didn't use loctite on the set screw you'd probably be fine. The area behind the oring is pressurized, fyi. I'd suggest plumber's tape or better yet something like blue loctite on both the piston shaft threads and the set screw's threads. assuming blue loctite is the same non-permanent type it used to be been a while since I bought any... actually it isn't necessary at all for the set screw, just the piston shaft's threads

edit: no expanded diagram or anything, but here's the closest we have for a manual

EDIT 2: wtf?! shoot me a pm with an email address and I'll email you the manual.

and rage, when will you be selling the brass edition to us? XD

Last edited by toymachine; 11-23-2012 at 02:22 AM.
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Old 11-23-2012, 04:28 AM   #8712 (permalink)
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Toymachine;

I got to make sure they will work first. I have a local guy with a couple of thumpers I will threw one in first. Make sure it will not break or have any problems. Making it and saying it is done is not the same as making it and having it work correctly.

So just to be clear I can drill and tap the end of that top piece so that there is a hole that goes right threw it. Then screw the piston shaft on followed by the set screw from the other side? And I will have NO leaks?

I only have one of these tops right now, I don't want to screw it up.
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Old 11-23-2012, 10:28 AM   #8713 (permalink)
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Nice work Rage01
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mailmanmike Since Monday! That's more than 4 hours though, so according to those cialis ads I should see my doctor.
tlane77 I think for a non-chemical chubby it's 6 hours before its time to see a doctor. So you should be good for another couple hours.
splattttttt I wasn't goin to google "chubbin" because I assumed it had to do with fat. The lard type, not the fun stuff. But what ever feelings Jeff's experiencing, then they must be of the fun like stuff...
tlane77 He's got a woody for your woods.
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Old 11-23-2012, 01:01 PM   #8714 (permalink)
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I'd drill through the stem, and put in an uber small spring to absorb any shock, just an idea
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Old 11-23-2012, 01:56 PM   #8715 (permalink)
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^lol

Quote:
Originally Posted by Rage 01 View Post

So just to be clear I can drill and tap the end of that top piece so that there is a hole that goes right threw it. Then screw the piston shaft on [using blue loctite or plumbers tape] followed by the set screw from the other side? And I will have NO leaks?
Yes, you are correct. Don't need to worry about using sealant on the set screw, but you do have to use it on the piston shaft's threads.
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Old 11-23-2012, 10:57 PM   #8716 (permalink)
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Well it looks like brass is out of the question for the piston for now.
Made 4 of them today and 4 of them were screwed.. Either broken in the lathe, broken in the gun or tossed across the shop with a few choice words.. I am going to go back to the steel one with aluminum ends.

<sigh> Sorry guys.
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Old 11-23-2012, 11:10 PM   #8717 (permalink)
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Quote:
Originally Posted by Rage 01 View Post
Well it looks like brass is out of the question for the piston for now.
Made 4 of them today and 4 of them were screwed.. Either broken in the lathe, broken in the gun or tossed across the shop with a few choice words.. I am going to go back to the steel one with aluminum ends.

<sigh> Sorry guys.
it's been a while since the carbon fiber craze, but if it was available... Ti even?, but stainless should do fine.
Don know about how mild steel compares to T6 though? Was the brass naval brass?
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THE-SHOOTIST Anyone chubbin' like me for this?
mailmanmike Since Monday! That's more than 4 hours though, so according to those cialis ads I should see my doctor.
tlane77 I think for a non-chemical chubby it's 6 hours before its time to see a doctor. So you should be good for another couple hours.
splattttttt I wasn't goin to google "chubbin" because I assumed it had to do with fat. The lard type, not the fun stuff. But what ever feelings Jeff's experiencing, then they must be of the fun like stuff...
tlane77 He's got a woody for your woods.
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Old 11-24-2012, 02:11 AM   #8718 (permalink)
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Quote:
Originally Posted by Rage 01 View Post
Well it looks like brass is out of the question for the piston for now.
Made 4 of them today and 4 of them were screwed.. Either broken in the lathe, broken in the gun or tossed across the shop with a few choice words.. I am going to go back to the steel one with aluminum ends.

<sigh> Sorry guys.
I think this is the most reasonable approach you could make, especially if you're working with something like a "mini" lathe. I had one of those in college, awesome little bit of equipment. Couldn't make much more than valve components for dump valve guns. if I can say though, I made some great little valve stems (the zero-force impulse valve was my crowning achievement before I gave up taking care of the lathe...), but I digress.


Anyways, as long as you make the shaft out of the strongest material, the ends don't really matter - assuming they seal well. Hell, assuming it wouldn't get scratched up over time or degrade/swell like some types of delrin, you could make the ends out of that material as well! Okay, I'm not 100% sure, but you get the idea.

I won't push you on the brass thing, but I have to ask: why not make a brass piston stem and al ends? Just curious.

BTW, rage, did I mention?

YOU'RE the MAN!

p.s. don't get discouraged, whatever happens. I've heard about a handful of guys who have set out to figure out the thumpers quirks over the years it's been out and most of them walked away cause they got too frustrated and just said it. But, for some reason I believe in you!!! In any case, keep up the good work
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Old 11-24-2012, 05:51 AM   #8719 (permalink)
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Wonder how well Titanium would hold up providing you could afford the high cost and the tooling needed to turn it.
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Old 11-24-2012, 08:48 AM   #8720 (permalink)
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I am going to attempt the Brass one more time today.. I got some ideas that just might work. Oh I did try just a brass stem, but the problem I am having with just the stem is keeping the keeping the front and back piece on.

And trust me I have thought about using delrin for both ends. the one end tho gets hammered back against the back of the body. When you take apart your thumper next time look at the back. You will see that the back of the piston and the back body housing are a dull aluminum color and there is NO ano on the back body housing. That's from where they are meeting together. I am afraid that using delrin it might chip and or break. But then again if it is meeting square on the face it might be ok. Hmmmm.... Things to think about.

I got all day saturday to tinker about. And seeing it is almost 6:00am here I might as well get started.

Later
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