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| jrrdw |
 Posted: 12/20/2009 19:28 PM Post subject: |
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Donating Moderator
Joined: 16 Nov 2005
Posts: 5522
9129.22 Spud Bux
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| Try and get it centered as possible. Does that hole in the center go all the way through? Can use it to hold the seal and washer but it will need sealed with JB Weld or simular.
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| RabidDuck |
| Posted: 12/20/2009 19:44 PM Post subject: |
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Corporal
Joined: 01 Nov 2008
Posts: 66
201.80 Spud Bux
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| no i'm going to smooth it all out tomorrow. Do you think i should fill it and try centering it better or will it work? The hole doesn't go all the way through.
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| jrrdw |
| Posted: 12/20/2009 20:03 PM Post subject: |
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Donating Moderator
Joined: 16 Nov 2005
Posts: 5522
9129.22 Spud Bux
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| See if you can work with what you have all ready, if you sand on the thicker part it will bring the hole to center. I think your doing a good job so far.
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| psycix |
| Posted: 12/21/2009 8:30 AM Post subject: |
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Donating Member
Joined: 25 Jun 2007
Posts: 3701
17.61 Spud Bux
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Your paint skills are awful!
Good to see our moderator still does some spudding though. 
There is completely no need for the channels leading to the barrel, just make the hole larger, like JSR's design.
JSR's design also uses a bolt to hold the sealing face, which is more reliable then glue.
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| jrrdw |
| Posted: 12/21/2009 8:42 AM Post subject: |
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Donating Moderator
Joined: 16 Nov 2005
Posts: 5522
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| psycix wrote: | | Your paint skills are awful! |
For 2 minutes time, that is awsome not awful. Now if I used MS Paint on a regular basis, well......
If your any better, inlighten us with your paint skills. 
Do not confuse this post with anything other then a attempt to trick you into doing a better job of creating this diagram then I did, it is indeed exactly that  .
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| roboman |
| Posted: 12/21/2009 10:22 AM Post subject: |
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Sergeant Major
Joined: 25 Nov 2008
Posts: 176
127.42 Spud Bux
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| I would suggest a forstner bit for the center hole....much easier to use (in this case) than a holesaw.
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| jeepkahn |
| Posted: 12/22/2009 15:27 PM Post subject: |
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GRUMPY OLD FART
Joined: 09 Jan 2009
Posts: 754
772.95 Spud Bux
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AHEM... here's some pics of 2" and 4"....
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| jrrdw |
| Posted: 12/22/2009 15:44 PM Post subject: |
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Donating Moderator
Joined: 16 Nov 2005
Posts: 5522
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| When did you build these?
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| jeepkahn |
| Posted: 12/22/2009 16:52 PM Post subject: |
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GRUMPY OLD FART
Joined: 09 Jan 2009
Posts: 754
772.95 Spud Bux
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| jrrdw wrote: | | When did you build these? |
the 4" was for dd-1(about a year ago), and the 2" was a coupla months before that...
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| POLAND_SPUD |
| Posted: 12/22/2009 19:15 PM Post subject: |
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Lieutenant General
Joined: 13 Oct 2007
Posts: 4387
11901.36 Spud Bux
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lol jrrdw & JSR
two spudders one cup
I've got to admit jrrdw that you paint skillz are even worse than mine... and yeah I agree with psycix that jsr's idea is better and simpler to implement (unless I am missing something?)
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| jrrdw |
| Posted: 12/22/2009 19:20 PM Post subject: |
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Donating Moderator
Joined: 16 Nov 2005
Posts: 5522
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| Poland_Spud wrote: | lol jrrdw & JSR
two spudders one cup |
and our cup runith over! 
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| jackssmirkingrevenge |
| Posted: 12/22/2009 22:46 PM Post subject: |
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aspiring machinist
Joined: 15 Mar 2007
Posts: 18058
32513.12 Spud Bux
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| POLAND_SPUD wrote: | | two spudders one cup shaped piston |
OH FFS!!! And I though 2 girls 1 CPU was bad!
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| RabidDuck |
| Posted: 12/23/2009 19:38 PM Post subject: |
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Corporal
Joined: 01 Nov 2008
Posts: 66
201.80 Spud Bux
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haha update here. needs some more smoothing out but it's getting there. It's kinda hard to do Jrrdw's design now that i sanded out too much so i think it maybe just be a regular cup piston with out all the vent holes and such but here are the pictures. I sanded this out while standing outside while it was snowing, brrrrrrrrrr.
http://img163.imageshack.us/gal.php?g=piston21001.jpg
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| jrrdw |
| Posted: 12/24/2009 12:41 PM Post subject: |
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Donating Moderator
Joined: 16 Nov 2005
Posts: 5522
9129.22 Spud Bux
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As long as you get your sealing surface flat as can be, this should work.
The question seems to be how well.......
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| Willdebeers |
| Posted: 12/24/2009 12:49 PM Post subject: |
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2nd Lieutenant
Joined: 03 Feb 2009
Posts: 225
47.96 Spud Bux
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I always had a problem with sealing, and I found that if you mark off the line you want to cut, then sand it off after, you usually get a relitivley flat sealing face.
Of course, I just use my lathe
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