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Need some help please from someone

Discussion in 'Anything Airgun Related' started by tomsteebs, Jan 5, 2014.

  1. tomsteebs

    tomsteebs Donator

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    hi,

    my favourite rifle is in need a some more fine tuning to get it where i exactly want it in my quest for the ideal sporting pcp ;)

    it's an fx2000 in .22 and i have so far got the power where i want it and made the cocking smooth and light on the side bolt.

    it is currently very quiet already, but i think i can make it considerably quieter without wacking a big silencer on.

    essentially the hammer spring resonated after it drives the piston head into the valve. this is because it has about 8mm of movement along the hammer shaft (i think this is what they are like as standard as all the replacement springs i have are that length.

    so i need a piece of material to fill this void, so the spring cant slide along the shaft.
    my thoughts were delrin or an alloy?

    here's a sketch of what i need, and in 3 different lengths so i can make sure the power is legal if it affects that. (i have various power springs to play around with in conjunction with this aswell.

    http://s1167.photobucket.com/user/T...s/IMAG0213_zpshquvltsn.jpg.html?state=replace


    can anybody turn the 6 lengths all with 6mm center holes?

    does anyone suggest a different method?

    if someone could help it would be really great as i would really like to get this superb rifle refined as much as i can.

    regards
    tom
     
    Last edited: Jan 5, 2014
  2. Accuspell

    Accuspell Pro Poster

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    Find your local model engineering club - they will have / know of someone!
     
  3. audiguypaul

    audiguypaul Donator

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    Dont know if this will help but after a hammer and rail polish on my 510 the hammer spring developed a nasty twang, i ended up threading about 2 inches of shrink tube onto the spring furthest from the hammer and shrunk it tight, problem solved.

    ATB Paul
     
  4. tomsteebs

    tomsteebs Donator

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    Well I thought doing something like that but wouldn't that affect consistancy and possibly power?
    Mine doesn't twang, it pings, just like the huntsman classic...
     
    Last edited: Jan 5, 2014
  5. Stu83

    Stu83 Engaging Member

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  6. tomsteebs

    tomsteebs Donator

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    Hmm thanks, I thought it was the springs rebounding, this seems a bit dodgey to me, putting bits in the cylinder no matter how clean!.... Eeek
     
    Last edited: Jan 5, 2014
  7. Stu83

    Stu83 Engaging Member

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    Ive had no problems with the ones ive done:D
     
  8. tomsteebs

    tomsteebs Donator

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    essentially im after a de-pinger, from what i've read, the hammer area is the cause so fixing that would fix the ping.....
     
  9. Stu83

    Stu83 Engaging Member

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    if its pinging doing work on the hammer wont do anything its sound resonating down the air tube.
     
  10. tomsteebs

    tomsteebs Donator

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    oh, well i'll have to find out how to open up my cylinder... still after the spacer though ;)
     
  11. jeremy

    jeremy Posting Addict

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    To solve that is fairly easy, and cheap. On the falcons just use a 12 bore plastic wad (basically a tube slightly smaller than tube with a sealed end) with a quarter inch hole bored in the end couple of O rings to tighten inside and push in open end first to back of pressure tube nr hammer. Sorted nice and quiet as in effect you are creating two separate chambers so air can not reverb.
     
  12. tomsteebs

    tomsteebs Donator

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    you got a link to the wide pvc/vinyl tubing that is wide enough....
    £8 is cheapest 40mm tube yet
     
    Last edited: Jan 5, 2014
  13. tomsteebs

    tomsteebs Donator

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    okay, so ordered both 40mmx3mm pvc clear tubing and some teflon/ptfe rod to make both myself, hopefully this will sort the two niggles.

    thanks for the help guys for your options for sorting this out :up:
     
  14. secretagentmole

    secretagentmole Low down, dirty and quiet...

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    Which is why delrin hammer pips work so well at de-pinging on the Rapid I suppose?
     
    Last edited: Jan 6, 2014
  15. tomsteebs

    tomsteebs Donator

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    I stayed quiet ;) they do it on hw100 aswell
     
  16. rossco

    rossco Well-Known Member

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    Hi,
    as to your spacers you can probably get these off the shelf !!! You need a real old fastening or bearing shop. Your in Leicester ? Pm me and I will point you in the right direction.
     

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