GTA
All Springer/NP/PCP Air Gun Discussion General => European/Asian Air Gun Gates => Turkish AirGun Gate => Topic started by: havenofear on July 20, 2016, 10:25:29 PM
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I wanted to buy a gas ram as a spare for my Hatsan 125 sniper. It is rated at 75 kg. I have no idea what it means. How much pressure does it contain? (psi/bar). I will appreciate some one to enlighten me on that.
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My guess is it means 75 kgf/cm2.
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If memory serves, the Sniper version rams are filled to 135 bar. If you send an e-mail to service@hatsanusa.com, they should be able to tell you for sure.
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Steve, When you say sniper version, does that mean Hatsan has different types of rams for use in various styles of guns? I assumed they were pretty much all the same.
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If you look at any caliber of the 95 and the fps they're rated for, the gas ram is filled to 125 bar. For the 125/135 versions which are rated 100 fps higher, the ram is just filled to a higher bar pressure to create that extra power...which also means they take more muscle to cock.
When I had both my 95 and Edge .177 Vortex's apart to tune, both rams said the same thing: Do not exceed 150 bar...leads me to the idea they have the same ram in all the guns, just filled to higher pressure for the more powerful models. Just don't quote me on it because I'm not 100% positive on that theory...lol
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This is from a Polish dealer's translated website:
The company Hatsan offers 7 models, springs Vortex Gas Piston:
Type-1 models: 55, 60, 70, 75, 80, 88, 90
Type-1B models: 85, 95, 99
Type-2 models: 125, 125TH, 125 Sniper, 135 Torpedo: 150, 150TH, 155
Type-3 models: Striker 1000S, Striker 1000X, Striker Edge
Type-4 models: Dominator, Dominator Carbine
Type-5 models: Torpedo 100X Torpedo 105X
Type-6 models: 25 SuperTact 25 SuperCharger Development: the company ShargŪ exclusive importer company Hatsan
I do not know the specs of each different gas ram, but it seems in Europe at least, that different Hatsan's have different rams.
Hope this helps,
-Y
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I was fortunate to buy 3 pieces of vortex pistons Type 1 and type 2 (2 pieces) when they were just released into the market. However two of them leaked quite badly after about 2k shots. I have retired all of them and replaced the vortex with 3rd party nitro rams. I installed a Benji XL nitro piston into my Sniper125. It is shooting close to 880+ fps with 19 grainers. My sniper 85 (0.177) houses a Russian ram with 140 bar. It shoots about 800 fps with 10+ grainers. I am very satisfied with their performance. I have given up on the vortex pistons for now.
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Seems to me some of the industrial gas rams are rated for really high numbers (like 500k compressions). Why can't Hatsan achieve something like this? I've only had one fail but that was at something like 800 shots.
Dennis
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Seems to me some of the industrial gas rams are rated for really high numbers (like 500k compressions). Why can't Hatsan achieve something like this? I've only had one fail but that was at something like 800 shots.
Dennis
I had the Benji XL nitro piston installed into my H155 since 2012. It has shot more than 4k rounds already and still shooting great. It still has the OEM piston seal though. It is about time to change it. I trust the Benji XL nitro pistons. The vortex pistons are filled with compressed air like the Theobens and it is bad for O-rings in the compression chamber of the vortex pistons. Nitrogen filled ones are better. Just a thought, perhaps the vortex pistons could be filled with nitrogen instead.
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Seems to me some of the industrial gas rams are rated for really high numbers (like 500k compressions). Why can't Hatsan achieve something like this? I've only had one fail but that was at something like 800 shots.
Dennis
I had the Benji XL nitro piston installed into my H155 since 2012. It has shot more than 4k rounds already and still shooting great. It still has the OEM piston seal though. It is about time to change it. I trust the Benji XL nitro pistons. The vortex pistons are filled with compressed air like the Theobens and it is bad for O-rings in the compression chamber of the vortex pistons. Nitrogen filled ones are better. Just a thought, perhaps the vortex pistons could be filled with nitrogen instead.
Yup!
Good idea. Maybe you can exchange the air for NO2 in the vortex. They are fillable, aren't they?
-Y
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Seems to me some of the industrial gas rams are rated for really high numbers (like 500k compressions). Why can't Hatsan achieve something like this? I've only had one fail but that was at something like 800 shots.
Dennis
I had the Benji XL nitro piston installed into my H155 since 2012. It has shot more than 4k rounds already and still shooting great. It still has the OEM piston seal though. It is about time to change it. I trust the Benji XL nitro pistons. The vortex pistons are filled with compressed air like the Theobens and it is bad for O-rings in the compression chamber of the vortex pistons. Nitrogen filled ones are better. Just a thought, perhaps the vortex pistons could be filled with nitrogen instead.
Yup!
Good idea. Maybe you can exchange the air for NO2 in the vortex. They are fillable, aren't they?
-Y
Yes, they can be refilled. But you need to 'empty' the compressed air, then refill it with nitrogen.
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Yes, probably 3 or 4 times. Nitrogen gas is widely use in industrial and food storage applications. It should be available from an industrial gas supplier.
How many bar?
As you probably know, it compresses less than air and is less temp sensitive too...
-Y
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Yes, probably 3 or 4 times. Nitrogen gas is widely use in industrial and food storage applications. It should be available from an industrial gas supplier.
How many bar?
As you probably know, it compresses less than air and is less temp sensitive too...
-Y
Before I retired my vortex pistons, I used to fill it to 140 bar. Some russian rams rated at 165 atmospheres (about 167 bar)
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Sorry for the delay in the reply, but it could be useful to some others.
The force must not be confused with the pressure in bar (pressure atmospheres), the piston rod is 8mm diameter, in cm2 it is 4x4x3.14 circle area equal to 0.5420 cm2.
so a 75Kg of force is about 140 atm.
I use for work pistons also from 180atm MAX equal to 90Kg of force.
Greetings
Francesco
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Francesco,
Thanks for information. In Italy you should be able to order the Polish Hatsan gas rams easily.
-Y
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What about Russian rams?
Robert from the Philippines had installed them for a couple of years usage.
Hopefully, he can share to us about his experience.
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What about Russian rams?
Robert from the Philippines had installed them for a couple of years usage.
Hopefully, he can share to us about his experience.
All my Hatsans H155, H125 Sniper and H85 Sniper were bought as SPRING POWERED. I purchased 3 vortex nitro pistons when they just came into the market from a Polish Gun Shop. When I got them, I replaced all the springs in my H125 and H85 with the Vortex NP. The H155 had a Benji XL NP installed. That was a number of years ago. Todate, my H155 with the Benji XL NP is still shooting great just like the first day of installation. However, I cannot say the same for the other two. Both Vortex NP developed a leak less than a year of average usage. It was a great disappointment since the Vortex NPs were quite expensive. I searched Ebay for a better replacement and saw the name of this seller from Russia: alexeybezporoxa (https://www.ebay.com/itm/Hatsan-55-70-8x-9x-1000-gas-ram/292454075532?hash=item44179f0c8c:g:C8oAAOSwsW9Y2v2~ (https://www.ebay.com/itm/Hatsan-55-70-8x-9x-1000-gas-ram/292454075532?hash=item44179f0c8c:g:C8oAAOSwsW9Y2v2~))I bought two from him; one for H125 (rated 86 kg) and one for H85 (rated 75kg). When they came, I replaced the Vortex NPs with these. Oh, almost forgot, I had to use the spring powered plastic backstop to finish the installation. The plastic backstop from the Vortex NP set is too short. Fast forward to date, my H85 is still shooting great, never lose any power but the one in my H125 weakened after 1 and 1/2 years. I replaced it with a Benji XL NP which I bought from John of www.jgairguns.biz (http://www.jgairguns.biz). I must say the Benji XL NP is the best. It is very reliable and has never lost power.
I have this to say to those who wish to have their SPRING POWERED Hatsans (H155 - H125) to replace their springs with Benjamin NPXL Nitro Pistons. If and when my H85 sniper with the russian ram fails, I will replace it with Crosman NP2 Nitro piston.
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Based on personal experience I agree with Robert on the Crosman rams.
In the U.S.A. they are very cheap, we know the specs, and are easy to obtain.
They are my go to for a good quality Gas Spring that the Hatsan Gas Springs have nothing over even if you could get one.
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I have been thinking it wouldn't be that hard , provided one had proper tools , to make a rebuild-able / adjustable pressure air ram as a replacement option and tune-ability. not much different than an air tube for a PCP. ???
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With some work? You could make the Crosman Gas Rams do as you are saying in a way.
Remove the plug and add a fitting to refill with air.
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I have been thinking it wouldn't be that hard , provided one had proper tools , to make a rebuild-able / adjustable pressure air ram as a replacement option and tune-ability. not much different than an air tube for a PCP. ???
No need to do anything to Crosman gas rams. They are cheap and reliable. Both my H155 and H125 are Crosman NP powered. So far, my most powerful gas ram gun is the H155 followed by H125, Benji NPXL, Diana 48 and Benji NPAW (installed with SMS Brazillian gas ram 3 years back). All in .22
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Here I am again to write.
I use industrial gas pistons and I normally use them for work
as shock absorbers on scales plates.
I buy them from an Italian company specialized in the sector.
I enclose technical specifications of the pistons that interest us.
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Vortex gas rams are filled with compressed air which degrades the o-rings over time. The o-rings in the tanks of PCP suffer the same fate and we have to replace these o-rings after some time. If the vortex gas rams are filled with nitrogen, I believe they will last very much longer. Those who are able to open up their vortex gas rams should try to refill them with nitrogen and see how they perform.
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The gas pistons of the SpecialSpring are filled with nitrogen and they go really well.
Only that having been born for other purposes it is necessary to adapt them with thick washers.
Ciao Francesco
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The gas pistons of the SpecialSpring are filled with nitrogen and they go really well.
Only that having been born for other purposes it is necessary to adapt them with thick washers.
Ciao Francesco
Which one would you pick for the Hatsan 95 Vortek?
Thanks,
Yogi
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Vortex gas rams are filled with compressed air which degrades the o-rings over time. The o-rings in the tanks of PCP suffer the same fate and we have to replace these o-rings after some time. If the vortex gas rams are filled with nitrogen, I believe they will last very much longer. Those who are able to open up their vortex gas rams should try to refill them with nitrogen and see how they perform.
That would be fantastic to try if not for the cost of getting Nitrogen tanks to do that. Not to mention the correct fill gear.
The whole thing about the Hatsan Rams was you can fill with air. So your suggesting, even though we can not buy one, we fill it with a high cost gas.
:o
I'll just change to a company that I DON'T have problems buying from. Much cheaper on my wallet.
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Which Crosman would be best for Edge,Striker or 95? Thanks
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I can't say for sure, but it must be something like a the preload or "average" or maximum axial force on the ram. When I got one for my CFX there were 45 and 55 kg (kilogram) versions available (I think those were the numbers). Anyway, discussion lead me to stick with the lower number instead of going higher like some people thought (more power, right? Blown seals more likely).
So, I see Custom Airseals carrying the 75 kg ram. You might ask them what the number means.
Or you might read about it here: http://www.indgassprings.com/how-gas-springs-work.html (http://www.indgassprings.com/how-gas-springs-work.html). Actually, I learned something here--I never realized the piston inside is ported. It makes sense though. As you can see from the diagram, there is a likelihood of a significant preload already, and that was my experience with the gas ram I bought. I see they have a calculator too--that might be fun to check out.
PS Scratch that calculator--it is just a short discussion of the calculation.
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Which Crosman would be best for Edge,Striker or 95? Thanks
The standard Crosman NP ram, part # BT9M22-00-5A. Takes a little modifying but there's a thread or 5 on GTA about doing it if you do a search for converting a Hatsan to a Crosman NP.
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https://www.youtube.com/watch?v=J4ZJOLf8EJ8&t=45s (https://www.youtube.com/watch?v=J4ZJOLf8EJ8&t=45s)
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Which Crosman would be best for Edge,Striker or 95? Thanks
I believe that the 95 and 85 have the same compression chamber dimensions. I have installed the Benji NPAW (not the NPXL) into my 85 sniper before but found it lacking the power that I wanted. I am pretty sure that the Crosman NP2 nitro piston can be installed into the 95. You need a spacer and a centering block.
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Crosman and Benjamin NP. rifles are now made in China. Probably their NP spring pistons are from China too. I suppose that Gamo, Norica, Hatsan, and others don't manufacture their own spring pistons in their factory. They are probably imported from else where.
Have anyone try using China NP. gas spring piston???
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Anyone?
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Specification.
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Specification
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There are many more...
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The gas pistons of the SpecialSpring are filled with nitrogen and they go really well.
Only that having been born for other purposes it is necessary to adapt them with thick washers.
Ciao Francesco
Which one would you pick for the Hatsan 95 Vortek?
Thanks,
Yogi
depends on the stroke of the piston.
It is sufficient to put the tool to clean the unloaded rifle inside barrel, make a mark, then load the rifle and replace the tool and mark it.
with a meter see the distance of the piston.
I hope I have been helpful
Ciao
Francesco
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The Hatsan 95 has a stroke of 90mm I believe.
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Just keeping track of this thread.
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The Hatsan 95 has a stroke of 90mm I believe.
model of the pistome is M90-100 with red color for 140 ATM equal to 70KG of force or yellow force 180 ATM equal to 90KG of force
https://www.gatewaytoairguns.org/GTA/index.php?action=dlattach;topic=112171.0;attach=218071 (https://www.gatewaytoairguns.org/GTA/index.php?action=dlattach;topic=112171.0;attach=218071)
Ciao
Francesco
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It is sufficient to put the tool to clean the unloaded rifle inside barrel, make a mark, then load the rifle and replace the tool and mark it with a meter see the distance of the piston.
If you elect to try this method?
Be aware!! You have a long rod down the barrel of a cocked gun!
Another problem is unless you can de-cock the gun? You'll need to dry fire it.
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The Hatsan 95 has a stroke of 90mm I believe.
model of the pistome is M90-100 with red color for 140 ATM equal to 70KG of force or yellow force 180 ATM equal to 90KG of force
https://www.gatewaytoairguns.org/GTA/index.php?action=dlattach;topic=112171.0;attach=218071 (https://www.gatewaytoairguns.org/GTA/index.php?action=dlattach;topic=112171.0;attach=218071)
Ciao
Francesco
I have used the USA made N-Forcer gas springs in a number of gas spring conversions. They are fast-acting enough for spring guns. They can be ordered in custom pressures. They can be rebuilt, and you can adjust the pressure with the proper tools.
I found the red label or blue label to be well suited to airgun use.
http://www.n-forcer.com/content/pdf/Mini.pdf (http://www.n-forcer.com/content/pdf/Mini.pdf)
For a 90mm stroke Hatsan, you could probably use the MF19-100 RD
Not quite 75 KG load but close. You could use the yellow label gas spring if you want the maximum spring force. The guns where I tried the yellow spring slammed badly but they did not have the volume of the Hatsan, so the yellow might work for you.
Pricier than the Chinese gas springs, but generally better quality. I used one in a gun to win the Hunter Piston class at the 2012 AAFTA Nationals.
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Scott,
Your posts on the N-Forcer are my go to guides.
;D
They are Nitrogen filled and I even checked on buying the equipment to charge them.
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The Hatsan 95 has a stroke of 90mm I believe.
model of the pistome is M90-100 with red color for 140 ATM equal to 70KG of force or yellow force 180 ATM equal to 90KG of force
https://www.gatewaytoairguns.org/GTA/index.php?action=dlattach;topic=112171.0;attach=218071 (https://www.gatewaytoairguns.org/GTA/index.php?action=dlattach;topic=112171.0;attach=218071)
Ciao
Francesco
I have used the USA made N-Forcer gas springs in a number of gas spring conversions. They are fast-acting enough for spring guns. They can be ordered in custom pressures. They can be rebuilt, and you can adjust the pressure with the proper tools.
I found the red label or blue label to be well suited to airgun use.
http://www.n-forcer.com/content/pdf/Mini.pdf (http://www.n-forcer.com/content/pdf/Mini.pdf)
For a 90mm stroke Hatsan, you could probably use the MF19-100 RD
Not quite 75 KG load but close. You could use the yellow label gas spring if you want the maximum spring force. The guns where I tried the yellow spring slammed badly but they did not have the volume of the Hatsan, so the yellow might work for you.
Pricier than the Chinese gas springs, but generally better quality. I used one in a gun to win the Hunter Piston class at the 2012 AAFTA Nationals.
Products in the US or Europe does not matter, they must be of good quality.
Ciao
FRancesco
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I still say that the Crosman nitro pistons are reliable and powerful enough for the Hatsan Springers. However, they can only be replaced the springs in the Hatsans AND NOT the vortex ones. The reason is the plastic backstop are different. Crosman NPXL nitro pistons can be installed in H105 - H155; NP2 nitro pistons for 55 - 95. I have attached the installation plans that I used to convert from spring to gas ram. My H155 is a testament to the reliability of the Crosman NP. Installed in 2012 and still as powerful as the first day.
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Robert, very professional ! 2 thumbs up !!
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Well, Robert have explained the procedure to convert the spring powered version to gas spring piston (strut) with proper installation. I thankfully ,admired him, respected his sincere contribution and experience that he share with our members of the GTA.
""Without proper installation, even with a reliable and branded gas spring strut, it will not be durable.""
""""Why? ....."" "":What? ....."""
To b continue. ....
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Without proper installation, even with a reliable and branded gas spring strut, it will not be durable.
Where did that come from?
It is true but wondering where you got the quote.
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...
""Without proper installation, even with a reliable and branded gas spring strut, it will not be durable.""
""""Why? ....."" "":What? ....."""
To b continue. ....
That is true.
Incorrect spacing can cause problems in short order. If you use a 100mm stroke gas spring in a gun that has a 100mm piston stroke, at minimum, you'll likely blow the internal oil past the seal. And if it tops out completely, it may beat itself to death.
You need a few mm of dead space when cocked and you need a few mm of preload so as not to top out. A 90mm stroke gun could use a 100mm stroke gas spring spaced such that there is about 5mm of preload, leaving about 5mm before topping out when fired.
You don't want to use 100% of the throw of the gas spring. 90% can work if balanced evenly. 80% would be safer for longevity. I've used more than 90% but experienced problems with oil forcing past the seal. Losing a little oil may not wreck it but it's still not good.
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Robert is correct about the layout of his installation of the gas strut in his rifles. With his application of " centering block ", "piston plate", "tube base",etc, and electrical tape to secure the gas strut in the piston and cylinder.. This is to avoid any " side load" to the chrome rod and also assist the chrome rod to move parallel and evenly contacting with the seal in the gas strut. And also avoiding any friction and contact when the piston travel..
Scott is correct too about the spacing allowance for the lubricating oil in the tube of the gas strut and the necessary of a preload for the gas strut.
There are now 2 methods of installation, '1' with the chrome rod in the piston, '2' with the tube in the piston. Which installation is better???? There are too many pros and cons about this issues. I will provide some informations and suggestions from some gas strut pistons company to help everyone to understand and make the right choice. And also there are the temperature issues, storage issues and life span issues.
LOL. About the storage issues , if you chose the "method 1", or you have a gas ram piston air rifle that the chrome rod is in the piston, you need to consider and start re-arrange the storage of your rifle soon.. ;D
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To be continue. ..
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To be continue....
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Coming soon!!
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For anyone interested in the Russian gas rams, go search them on Ebay. I just passed quite a few surfing for other stuff. They also don't appear to be cheap as most prices appeared to be in the $40-$50 range.
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For anyone interested in the Russian gas rams, go search them on Ebay. I just passed quite a few surfing for other stuff. They also don't appear to be cheap as most prices appeared to be in the $40-$50 range.
I have bought a few Russian gas rams. They replace the springs in the Hatsans with the longer plastic backstop. I have not seen any Russian GRs that replace the vortex gas pistons though or perhaps I have missed those. Anyway, the Crosman nitro pistons from the NPXL that fit the 105 - 155 Hatsans are relatively cheap. Why bother to buy from Ebay? The NP2 gas rams fit the 55 - 95 Hatsans. Just fabricate in delrin or aluminum those parts I mentioned in my plans and you are good to go. They will last a long time. I have bought a few of each Crosman gas rams as spares.
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Robert, it is possible to replace the Hatsan Vortex version too, with the crosman or other brand spring piston strut . All you need is to saw out the base of the original vortex ram and modify it to fix with the strut that you want to install. Another alternative is to purchase the end cap of the spring coil version which is now available on eBay.
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The base part from the original vortex gas ram....
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For anyone interested in the Russian gas rams, go search them on Ebay. I just passed quite a few surfing for other stuff. They also don't appear to be cheap as most prices appeared to be in the $40-$50 range.
I've just been crazy now. bought was the last piece.
Price lower than those I use for work.
https://www.ebay.it/itm/Hatsan-125-gas-ram-piston-seal/162914036809?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649 (https://www.ebay.it/itm/Hatsan-125-gas-ram-piston-seal/162914036809?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649)
Ciao
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Uuh La La! !! Francesco ,
you are not crazy but you are just addicted!!!!!
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Nin and others,
All great information :D Keep it coming...
All that I can add, it that 2 people who's opinion I really respect say to lube the piston, the exposed part anyway, with either moly or Kroytox, to keep the seal lubed.
-Y
I guess we should be storing our guns flat.
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Yogi, you need to keep the chrome rod clean and avoid contamination. If your rifle is fitted with the chrome rod in the piston, you shall store your rifle barrel down, butt up.( I suggest by hanging ). Please read the manufacturer recommendation about the gas strut orientation and storage again. There are lubricant fluid or oil in the tube of the gas strut specially for the seal.
The hatsan vortex struts have some lubricants too but very , very, very little. During the cold season, this lubricant may harden and may not flow to the seal. And all the hatsan vortex rifles are fitted with the chrome rod in the piston, and owner usually store their rifle butt down , barrel up in the cupboard or safe. Or on display rack that is horizontal. There is very little lubricants in the vortex strut, I know because I cut and examine the original vortex strut. I can smell it but nothing flow out from the tube of the strut.
There are numerous complaints of the ''honking" sound from their newly purchased Hatsan vortex rifle... l believe the seal in the vortex strut has no contact with the lubricants, causing the chrome rod and the dry seal rubbing thus making the sound and echo out from the cylinder.
Please read the manufacturer recommendations, that I post before, carefully. And analysis the effective orientation for your rifle.
""Prevention is better than cure""
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There is also a video by Mr. Mike Ell. on YouTube, he cuts the vortex strut and show everyone what is inside the strut , the rod and the small plastic piston in them. Then you will realise and understand that the lubricant can remain at the bottom of the tube (housing) if it is oriented with the chrome rod up.
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There is also a video by Mr. Mike Ell. on YouTube, he cuts the vortex strut and show everyone what is inside the strut , the rod and the small plastic piston in them. Then you will realise and understand that the lubricant can remain at the bottom of the tube (housing) if it is oriented with the chrome rod up.
Here's that video: https://www.youtube.com/watch?v=pyshCMXNIGQ (https://www.youtube.com/watch?v=pyshCMXNIGQ)
He's got quite of a lot of interesting air rife videos.
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This is a piston M90-100 red force 70kg equal to 140 atmospheres,
I have just arrived from the factory and as you can see it has a little bit of vaseline fat on the base of the chrome barrel.
Vasellina because natural fat does not ruin the high seal gaskets.
I use these normally as shock absorbers on plates of industrial scales.
Ciao
I apologize for the language I help with google translator
(http://images.sifteam.eu/thumbs/franz62/img20180307153759.jpg) (http://images.sifteam.eu/browse/view/1/id/1482)
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Francesco, the vaseline that you are talking about, I wonder is it the one with menthol smell, Vaseline Vapor Rub which is petroleum jelly???
""Mamma Mia""
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tecnical fat of vaseline.
https://www.google.it/search?q=grasso+di+vaselina&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwix3ojCwNzZAhVOMewKHQqOBTwQsAQIsAI (https://www.google.it/search?q=grasso+di+vaselina&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwix3ojCwNzZAhVOMewKHQqOBTwQsAQIsAI)
Ciao
Ps; I just did a little research on google and apparently this product we use it so much only here in Italy
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Francesco, the grasso vaselina contents are paraffin , mineral oil and some others. Paraffin is similar to petroleum jelly. It maybe suitable for keeping the seal in good shape that you have experience them with the scale that you are working daily. Thanks for sharing your find.
But is the paraffin in the vaselina be suitable on the piston rod that install in the air rifles ??? I don't know .
Do they emit vapor or fumes that can mixed with the air within the cylinder and travel into the the compression chamber???
I don't know too.
Watch::
There is a video on youtube by Guns of Liberty. The title is " How to make your air rifle into a deadly weapon - Taylor's homestead visit"
Attach::
I have found another manufacturer's recommendation about maintenance of gas strut.
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they come with the grease on the axle from the factory, perhaps because they are built for purposes other than the airgun
Ciao
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Is there anybody, who install their Hatsan rifle with the Crosman NP 2 gas ram?
Hopefully, they can post their comments or experiences about the NP 2 's durability and availability.
There are lots of members here that are interested in them, will appreciate all comments and suggestions to share.
There is a video by "firearmsguide" on YouTube about the NP 2.
The title is
"Crosman Nitro Piston Gen 2 - presentation at Shot Show 2014"
""Innovations? Or Corrections ??""
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Is there anybody, who install their Hatsan rifle with the Crosman NP 2 gas ram?
Hopefully, they can post their comments or experiences about the NP 2 's durability and availability.
There are lots of members here that are interested in them, will appreciate all comments and suggestions to share.
There is a video by "firearmsguide" on YouTube about the NP 2.
The title is
"Crosman Nitro Piston Gen 2 - presentation at Shot Show 2014"
""Innovations? Or Corrections ??""
I have installed the less powerful NPAW nitro piston into my H85 sniper before. The NPAW nitro piston has almost the same dimensions as the one in NP2. I am pretty sure it can be done.
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This is a piston M90-100 red force 70kg equal to 140 atmospheres,
I have just arrived from the factory and as you can see it has a little bit of vaseline fat on the base of the chrome barrel.
Vasellina because natural fat does not ruin the high seal gaskets.
I use these normally as shock absorbers on plates of industrial scales.
Ciao
I apologize for the language I help with google translator
No need to apologize Francisco. I can understand Exactly what you are trying to say in english. ;)
You do... way better than me, sir. I can not read or speak anything but english. :-\ My Best Wishes To You - Tom