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Hw 80 internals

Discussion in 'Anything Airgun Related' started by dr.tigger, Sep 24, 2014.

  1. dr.tigger

    dr.tigger Well-Known Member

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    Can anyone advise me on piston / cylinder polishing and tuning kits.
     
  2. Jackroadkill

    Jackroadkill Donator

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    What do you need to know? We've got some pretty knowledgeable folk on here, so if you give a few more details of what you need to know, we can sort you out, I'm sure.
     
  3. ratman60

    ratman60 Pro Poster

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    hello, plenty of advice from our HW shooters on here, tuning kit just email tinbum on here or look his thread tuning kits.
     
  4. dr.tigger

    dr.tigger Well-Known Member

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    I just want to make it smooth and quiet as possible. Polishing piston is easy enough. But I'm not sure about how to polish the inside of piston.
     
  5. Tinbum

    Tinbum Delusions of adequacy

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    Put the piston rod first into a cordless drill and spin it up with medium emery, then fine and finish with autosol. The long you do it the better the job will be. On the lathe I reckon it to take 30mins, so double that for a good job in a drill. (It can be done while watching TV if you have a patient wife....... )

    As for kits, you have a huge choice, mine don't include a spring as most guns don't need a new one, they're sent day of purchase and they're only £19.99 inc post. Welsh willy kits are highly respected and cheaper than V Mach or Vortek. If you have access to a lathe, pm me and I'll give you the specs to make your own.

    Atb
    Nick
     
  6. Tinbum

    Tinbum Delusions of adequacy

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    Use a needle file to remove burrs from the cocking slot. I have a tool I made that takes abrasive paper and goes in the lathe, but it can be done by hand. You need a 20mm rod with a 10.5mm bore and a slot cut in one end. Put abrasive paper in the slot and wind it into the piston and turn it while pushing it up and down the whole length. Its a 5 min job by machine, a bit longer by hand.....
     
  7. mattyts

    mattyts Donator

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    Why would you want to polish the inside of it anyway?

    Surely easier to fit a liner?
     
  8. dave1962

    dave1962 Posting Addict

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    Does he meen the inside of the compression tube.
     
  9. dr.tigger

    dr.tigger Well-Known Member

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    Yes. I meant the inside of the compression tube. Oops. Dyslexic moment there.
     
  10. dr.tigger

    dr.tigger Well-Known Member

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    So I polished all the bits. Shoots very nicely but added about 1ft lb. next job shortening the spring. Thinking about getting a Titan no 14 and chopping in half. Two springs for price of one :)
     

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