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Pardini SP Oring

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Gary Collette
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Post by orpheoet 11/23/2020, 7:32 pm

I just took apart my SP bolt to replace the O rings for the first time. I've never had the bolt apart. There are 11 rings. I've read that there are 13…. Any ideas? I am positive that I didn't lose any. Interestingly the diagram at Pardini shows 14…..
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Post by radjag 11/23/2020, 7:35 pm

Maybe your gun was assembled on a Wednesday? The 11th, rather than on Friday, the 13th.

Sorry, no help at all, but I could not resist
lol!

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Post by James Hensler 11/24/2020, 5:41 am

Sir the last 2 must still be in the gun! If it only has 11 then there would be a huge gap between the black buffer and the stack of o- rings! 
One good thing is if you took out 11 and put 11 new ones back in it’s going to be ok. 
Call Alex today and ask him 

Did you insert a small Allen wrench all the way in the bolt
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Post by orpheoet 11/24/2020, 6:11 am

I am calling today....
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Post by ssauer2004 11/24/2020, 6:17 am

Keep us posted!
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Post by orpheoet 11/24/2020, 6:27 am

So the diagram shows 14, many say 13, mine had 11, and there’s a Pardini video in Italian that shows 10....
Pardini SP Oring  Cef4b610
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Post by orpheoet 11/24/2020, 6:50 am

Update. My .32 bolt has 13
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Post by James Hensler 11/24/2020, 7:08 am

orpheoet wrote:Update. My .32 bolt has 13
Bingo and they are still black so I would wipe them off and reuse them
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Post by orpheoet 11/24/2020, 7:16 am

James Hensler wrote:
orpheoet wrote:Update. My .32 bolt has 13
Bingo and they are still black so I would wipe them off and reuse them
Nope. Clear and hard.
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Post by James Hensler 11/24/2020, 7:27 am

orpheoet wrote:
James Hensler wrote:
orpheoet wrote:Update. My .32 bolt has 13
Bingo and they are still black so I would wipe them off and reuse them
Nope. Clear and hard.
Oh really? They look black in the pic. Well good mine was clear and hard and when stacked next to 13 new ones the old stack was noticeably shorter
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Post by orpheoet 11/24/2020, 7:29 am

James Hensler wrote:
orpheoet wrote:
James Hensler wrote:
orpheoet wrote:Update. My .32 bolt has 13
Bingo and they are still black so I would wipe them off and reuse them
Nope. Clear and hard.
Oh really? They look black in the pic. Well good mine was clear and hard and when stacked next to 13 new ones the old stack was noticeably shorter
What picture? The pic above is a screen shot of the Pardini video where he removes 10 rings and replaces with 10 rings.
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Post by James Hensler 11/24/2020, 7:32 am

orpheoet wrote:
James Hensler wrote:
orpheoet wrote:
James Hensler wrote:
orpheoet wrote:Update. My .32 bolt has 13
Bingo and they are still black so I would wipe them off and reuse them
Nope. Clear and hard.
Oh really? They look black in the pic. Well good mine was clear and hard and when stacked next to 13 new ones the old stack was noticeably shorter
What picture? The pic above is a screen shot of the Pardini video where he removes 10 rings and replaces with 10 rings.
My bad I thought that was from you
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Post by James Hensler 11/24/2020, 7:34 am

Pardini SP Oring  07083910
Take a q tip with some Clp and clean out the 3 tubes in the bolt the black on my bench it what came out . Must be the black coating
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Post by lablover 11/24/2020, 9:37 am

Curious where you found the last 2?
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Post by Gary Collette 12/2/2020, 8:18 am

Has anyone taken said O rings to an industrial supply and 
found a direct replacement??
I doubt Pardini had their own rings molded and would guess 
you can purchase a 100 bag for the same price as they will charge
for 13-14 of them.
A durometer gage should tell if the rings are neoprene or viton.
I expect neoprene as there is no high heat exposure requirement. 

G

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Post by Dr.Don 12/2/2020, 9:12 am

Try a search.  Somebody already posted a McMaster-Carr substitute that is really inexpensive.
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Post by radjag 12/2/2020, 9:15 am

5308T113 Oil-Resistant Hard Buna-N O-Ring, 1/16 Fractional Width, Dash Number 004, Packs of 100
Per Pack
2.27

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Post by 41smith73 2/17/2021, 11:49 am

All
I work for a industrial distributor and I just purchased 1000 o-rings (for cheap)If anyone needs some just mail me a self addressed stamped envelope and I will GIVE you a couple dozen>

John Cero
101-12th Street SW
Humboldt, Iowa 50548

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Post by CraigB5940 2/17/2021, 4:04 pm

As noted above:

Mc Master Carr O rings:
Part number 5308T113, Buna-N, Durometer Hardness (90A), 0.07” Width, 0.070” ID, 0.201” OD

I've been using them in my 22 LR unit for almost a year and the wear cycle and functionality seems to be the  same as the factory o rings so far.  think I have 5K on my current set. I have not tried them yet on my 32 ACP unit since that is not shot as much as my 22 unit.

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Post by 41smith73 2/22/2021, 2:40 pm

Mr. Mark your o rings are in the mail

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Post by Bullseye41 2/22/2021, 6:25 pm

John, If you still have some orings available I’ll take some. Thank you.

~Rick~
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Post by 41smith73 2/22/2021, 7:33 pm

Yes i do.

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