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All Springer/NP/PCP Air Gun Discussion General => Machine Shop Talk & AG Parts Machining => Share Your Simple Home Projects (TRICKS-N-TIPS) => Topic started by: neric on February 07, 2011, 09:24:17 PM
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Well,,,it's not really delrin,,,but it works,,,takes care of the spring twang with out plasti-dip or heavy tar or a machined delrin rod.
Two years ago I did this on my IZH 61 but I was too afraid to tell anybody what I did. First shot: all I could say was 'Wow!' Turned all that twang into a nice single sound: "thump" A year later after I bought a TX200 I was able to compare what a very nice springer sounds and feels like and I have to say that this one little cheap trick brought my 61 pretty close to the TX as far as smoothness in the firing cycle.
Just recently I learned about grinding main spring ends flat and polishing them - had to try it on my 61. Upon disassembly I found that this trick has held up very nicely with out any noticeable wear over 2 years and probably a thousand shots.
Since it held up very well I had to do it to my RWS 92, which I just did today. (The 92 already had flat spring ends.) (I cross hatched honed the air chamber of the 92 while I had it apart, but it didn't gain me any velocity,,,didn't loose any either; I gained 3% on the 61)
The cheap trick material is a gallon plastic vinegar bottle. Cut the ends off, used the flat middle material, cut with ordinary scissors, slide a sleeve of plastic in between the outside of the spring and the inside of the piston, and another one on the inside of the spring around the shaft of the pusher/spring guide. It fit perfectly. The benefits are simply tremendous.
Thanks to all you guys sharing your knowledge I have a couple of really sweet and cheap shooters. And its been a lot of fun for me.
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Kewl...thanks for sharing. You have pictures?
So sleeve around spring the length of the piston and sleeve around spring guide.
Happy Shooting!!!!
Dave
8)
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I second that, some pictures would be great!!!
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My RS2 and B-26 has the sleeve in the piston and it sure does make a difference especially when cocking. The cocking shoe does not ride on the spring when returning to horizontal.
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When I first did this,,,I assumed,,,that I wouldn't be able to have a complete sleeve and would have to leave the slot open for the cocking arm,,,,but as Bentong mentioned - it does fit, so I made a complete encompassing sleeve today.
Yes I made it fit the entire length inside the piston.
This RWS 92 has a nice tight fitting spring guide in the rear - which fits inside the main spring. I polished that spring guide and moly'd.
My IZH 61 internal spring guide had a lot of play in it so I made a two sleeves for my 61.
Bleach bottles another candidate,,,maybe even a little thicker. Milk jugs for something a little thinner.
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Nothin like a bit of Yankee Ingenuity! ;D ;D
pv
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Don't let Tom Gore see that, LOL! Poor man's Vortek. ;D
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Do the sleeves stay in the piston or do you attach them to the piston somehow?
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I made the sleeve fit tightly,,,just a friction fit,,,the front of the piston inner diameter gets narrower so as you push it in, it gets tighter. It doesn't move around during the firing cycle. The one I did on my IZH 61 has lasted for two years and stayed in place,,,probably a thousand shots. It isn't easy to get out. I had a hard time getting it out to take pics as an after thought.
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Great stuff guys.. Thanks for sharing..
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Guess you could call it a "Springer Depinger" or at least a "Springer Detwanger".
HeeHee
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So the sleeves stay put, don't slide back and forth. Especially on the guide end. Seems with the spring movement the sleeve would walk back and forth.
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Good idea neric. Glad it worked out for you and thanks for sharing. Did you use any lubricant on the sleeve? Maybe dry between the sleeve and the piston and lube between the sleeve and spring or did you just leave the whole thing dry?
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My RWS 92 rear spring guide was snug from the factory,,,didn't put a sleeve around it,,,just polished and lubed with spring chamber lube.
I did put a sleeve on spring guide of my IZH 61,,,,it did move a little away from the spring guide while in the resting state,,,but in the cocked mode it covers the spring guide,,,as it releases during the firing cycle it does dampen the spring movement,,,,it doesn't matter if its not covering the guide during resting state. That spring guide is inside the spring coils and can't wander around anywhere else,,,and it is tight enough that it is work to get it out.
And of course,,,one doesn't make these sleeves 'longer' than the metal you are covering,,,otherwise it would cause problems while cocking. So yes the guide sleeve did move a little, but has stayed put when it found its final position. It they aren't snug,,they probably would walk around
The sleeve inside the piston which fits around the outside of the spring when inserted, is dry on the side facing the piston, and lubed on the inside of the sleeve. I lightly oiled, not even a whole drop - just touched the bottle top to each spring coil before inserting.
It is definitely worth doing these mods,,,,it only cost me time.
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Thanks for the reply. All sounds pretty good. Will have to do that with the next rifle I take apart. Worth a try to see the outcome. Good of you to think that up and let us know about it... Every little bit helps. And you know us, always ready to try something to make things better.....
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when you put in the plastic did u glue the loose ends together or just lap them over each other or cut them so they just touch and the tension of them pushing out held them in place?
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when you put in the plastic did u glue the loose ends together or just lap them over each other or cut them so they just touch and the tension of them pushing out held them in place?
I have the same question.
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I didn't use glue when I did this to my Gamo and everything works fine. The shot cycle is very smooth and reduced the sound and recoil of my Silent cat considerably.
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I never glued mine, it took quite a bit of fitting to get it snug with the edges butted and it stayed in place. The last one I installed I cut and folded tabs to make sure it stayed and placed a brass washer inside over the tabs before inserting the spring then after it was in place I cut out for the cocking slot. So far so good. I got this on another post here.
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okay thanks for answering i got it installed on my tr77 but haven't got i back together yet just got my qb 57 today so got a bit distracted with that
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I'm going to try this on one of my B3's and chroney b4 and after.
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Neat tip! Thanks for sharing.
Sounds like my coil spring powered Hatsan Mod 125 super magnum would be a perfect candidate.
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Just finished this up on an XS46u. All I can say is WOW. What a difference in the smooth cocking stroke and feels like lees recoil. Smooth stroke and very quiet. Haven't chronied it yet but it feel really nice. I would assume I lost a little fps from the spring being snug in the piston now.
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Don't know if this will help, but the spring actually expands when you cock it. If you cut the sleeve so the edges just touch, (or not), you don't need overlap when making an internal sleeve. I like the idea and would like to see what the long term "rubbing" damage, to the material is.
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I didn't over lap any material. Left about an 1/8 inch gap. I'll tear it down again after a tin and look things over. Just shot about 100 at my indoor 10m range with no problems.
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What I do with these is cut the top in a saw tooth pattern and then tuck the ends in between the top hat and the spring so that the top hat holds the plastic in place.
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A tin is okay, but I'm talking like at 2,500 or better, to see some real indications of the future wear... If ya know what I mean.
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This is invaluable knowledge. What a great tip for guys on meager budgets like myself. I cant wait to try this.
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How is everybody's wear coming along? I would *love* to know!
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;D ;D This trick was passed along to me by Mark 611 back in the late spring 2013 and was jokingly called a ghetto Tune and the name stuck don't have time to find the original thread to post since I'm at work now and just popped in for a second ;)
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Thanks for this tip, I did it to my Gamo, Big Cat 1200. It was easy to do and I am very pleased with the reduction in noise and vibration.
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Going to do this for sure. Going to tune a gamo hornet.