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PostPosted: Sun Oct 02, 2016 5:29 am 
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Joined: Thu May 07, 2015 8:30 pm
Posts: 1184
Location: Eastern Townships
A friend of mine recently took his old Slavia 620 apart 'cause it wasn't shooting good anymore, and found out the leather main seal was toast. He asked me if I knew where to get a new one. I didn't know, but after some google research, I found out leather seals are relatively easy to make. Usually people will use a wood ''die'' and a socket or other suitable sized punch. My friend handed me the piston and main tube so that I could take measurements. I made a metal die and punch set, and used my 6'' bench vise to form it. I used the leather out of an old athletic belt as raw material (about 1/8'' thick), et voila! A brand new seal :)

http://www.pyramydair.com/blog/2007/12/ ... ston-seal/

http://www.airgunhome.com/agforum/viewtopic.php?t=9929


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PostPosted: Sun Oct 02, 2016 8:41 am 
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Joined: Thu Mar 24, 2016 7:33 pm
Posts: 240
Location: Yukon
airmec wrote:
A friend of mine recently took his old Slavia 620 apart 'cause it wasn't shooting good anymore, and found out the leather main seal was toast. He asked me if I knew where to get a new one. I didn't know, but after some google research, I found out leather seals are relatively easy to make. Usually people will use a wood ''die'' and a socket or other suitable sized punch. My friend handed me the piston and main tube so that I could take measurements. I made a metal die and punch set, and used my 6'' bench vise to form it. I used the leather out of an old athletic belt as raw material (about 1/8'' thick), et voila! A brand new seal :)

http://www.pyramydair.com/blog/2007/12/ ... ston-seal/

http://www.airgunhome.com/agforum/viewtopic.php?t=9929


Awesome,
You should use up the rest of the belt making more and marketing them to other members. There are a lot of Slavias out there. I believe leather ended in 1978.
t


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PostPosted: Sun Oct 02, 2016 10:18 am 
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Joined: Thu May 07, 2015 8:30 pm
Posts: 1184
Location: Eastern Townships
tango wrote:
airmec wrote:
A friend of mine recently took his old Slavia 620 apart 'cause it wasn't shooting good anymore, and found out the leather main seal was toast. He asked me if I knew where to get a new one. I didn't know, but after some google research, I found out leather seals are relatively easy to make. Usually people will use a wood ''die'' and a socket or other suitable sized punch. My friend handed me the piston and main tube so that I could take measurements. I made a metal die and punch set, and used my 6'' bench vise to form it. I used the leather out of an old athletic belt as raw material (about 1/8'' thick), et voila! A brand new seal :)

http://www.pyramydair.com/blog/2007/12/ ... ston-seal/

http://www.airgunhome.com/agforum/viewtopic.php?t=9929


Awesome,
You should use up the rest of the belt making more and marketing them to other members. There are a lot of Slavias out there. I believe leather ended in 1978.
t


Hmmm... maybe, why not? I also made a new breech seal for it.

I believe this rifle is from the late '60s or early '70s, BTW. The tube and piston are in very good shape, even after all these years!


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PostPosted: Mon Oct 03, 2016 10:35 pm 
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Joined: Thu Mar 24, 2016 7:33 pm
Posts: 240
Location: Yukon
airmec wrote:
tango wrote:
airmec wrote:
A friend of mine recently took his old Slavia 620 apart 'cause it wasn't shooting good anymore, and found out the leather main seal was toast. He asked me if I knew where to get a new one. I didn't know, but after some google research, I found out leather seals are relatively easy to make. Usually people will use a wood ''die'' and a socket or other suitable sized punch. My friend handed me the piston and main tube so that I could take measurements. I made a metal die and punch set, and used my 6'' bench vise to form it. I used the leather out of an old athletic belt as raw material (about 1/8'' thick), et voila! A brand new seal :)

http://www.pyramydair.com/blog/2007/12/ ... ston-seal/

http://www.airgunhome.com/agforum/viewtopic.php?t=9929


Awesome,
You should use up the rest of the belt making more and marketing them to other members. There are a lot of Slavias out there. I believe leather ended in 1978.
t


Hmmm... maybe, why not? I also made a new breech seal for it.

I believe this rifle is from the late '60s or early '70s, BTW. The tube and piston are in very good shape, even after all these years!


I would love to know what a leather sealed 620 would crono unmoded. My memory from the early seventies had mine shooting like a rim fire. Not sure if the under 500 was in effect back then or not?


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PostPosted: Tue Oct 04, 2016 7:45 pm 
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Joined: Thu May 07, 2015 8:30 pm
Posts: 1184
Location: Eastern Townships
This week-end the rifle is supposed to be put back together, and my friend asked me to bring my Chrony to check it. I'll post the results Tango :wink:


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PostPosted: Mon Oct 17, 2016 12:28 pm 
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Joined: Thu Mar 24, 2016 7:33 pm
Posts: 240
Location: Yukon
airmec wrote:
This week-end the rifle is supposed to be put back together, and my friend asked me to bring my Chrony to check it. I'll post the results Tango :wink:

Well? How did it go.
tz


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PostPosted: Mon Oct 17, 2016 8:13 pm 
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Joined: Thu May 07, 2015 8:30 pm
Posts: 1184
Location: Eastern Townships
tango wrote:
airmec wrote:
This week-end the rifle is supposed to be put back together, and my friend asked me to bring my Chrony to check it. I'll post the results Tango :wink:

Well? How did it go.
tz


His rifle is doing 621 avg. fps with 7.9 gr pellets, and it has the original spring 8)


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PostPosted: Tue Oct 18, 2016 5:32 pm 
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Joined: Thu Mar 24, 2016 7:33 pm
Posts: 240
Location: Yukon
Thanks for the info. good to know. I was thinking it would be 6-700 in its stock form as pine plant penetration is much better than my sub PAL Optimus.
best regards
tango


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PostPosted: Wed Oct 19, 2016 7:44 am 
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Joined: Tue Mar 17, 2015 7:43 pm
Posts: 167
Location: Estrie, Québec
What is the diameter of the seal/tube of the 620?

_________________
I'm breathing air, I'm shooting air…


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PostPosted: Wed Oct 19, 2016 4:49 pm 
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Joined: Thu May 07, 2015 8:30 pm
Posts: 1184
Location: Eastern Townships
I believe the tube is 26 mm. The seal I made has a 1.005'' OD, and it fitted rather tight at first in the Slavia's tube, but not too tight. The first 2 or 3 cocking stroke felt a bit hard, but after that it gave a ''normal'' feeling. Since leather is very forgiving, you'd have some room for variations in dimensions :) .


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PostPosted: Fri Oct 21, 2016 8:33 am 
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Joined: Tue Mar 17, 2015 7:43 pm
Posts: 167
Location: Estrie, Québec
Too bad, it will not do it for my 624! :)

I'm going to make my own in wood for this little 624 when I put my hand on the needed tools.

Edit: And thanks for the info. :)

_________________
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