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Rear guide breaking on hw 35

Discussion in 'Anything Airgun Related' started by gixxer, Jul 27, 2014.

  1. gixxer

    gixxer Posting Addict

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    Couple of years ago I replaced my old mans rear guide ,top hat on his 35 for a nylon type from chambers as it was better fitting and slightly longer.
    Hes no power freak and in 177 we settled it at 11.ft lbs which was ideal and felt really sweet.

    He phoned me today to say it had felt different so took the block off to find the seat of the guide had snapped off.

    any thoughts as to why this has happened ????.

    Its not over sprung ,fitted flat on the block face, and had a friction washer of brass too.

    On the pluss side he was able to get it apart himself ,well done old timer.
     
  2. landymick

    landymick Big Poster

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    That is one drawback of plastics & Delrin they sometimes break nothing to worry about more likely to break if over tight or under lubed.
     
  3. Mrman

    Mrman Donator

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    I can make you a nice aluminium one if you like:)
     
  4. DenTB

    DenTB Donator

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    Sorry Gixxer ..but ,,,my appologies for my girlfriend,but on (being nosey) reading your post she fell into hysterics at the wording. ,!! Hope you can see the funnyside too. Please.:D no offence intended in any way. Shes still in kinks .!:up: Thanks.
     
  5. gixxer

    gixxer Posting Addict

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    Oops ,she's a card. No probs.
     
  6. Tinbum

    Tinbum Delusions of adequacy

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    It can happen from time to time. I've had a few I've made go at the same point (less than 1%) and now heat treat all kits before packing them. This makes them shatterproof and should stop it happening in future.
     
  7. Mrman

    Mrman Donator

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    Hey tinbum, if its ok can you elaborate a little more on your heating process. Iv always used aluminium for my guides but would also like to try delrin to see the difference. ?
     
  8. Tinbum

    Tinbum Delusions of adequacy

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    I could tell tell you, but then I'd have to kill you.................:cool:

    :p
     
  9. gixxer

    gixxer Posting Addict

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    Thanks for chipping in gents, my own personal preference is steel but appreciate the qualities of derlyn and graphited nylon.
    Aluminium I havnt come across for guides what's the benefits over or compared to steel other than weight and machining.
    How does it stand up against spring over time ?.
    I will speek to him if I can't pick a used guide up about both that you guys engineer.

    I am disappointed it broke ,and it's not had much use possibly 300 shots.

    Glad he noticed it before any further damage .
     
  10. Tinbum

    Tinbum Delusions of adequacy

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    I tried aluminium, but the spring acted like a cheese grater and filled the gun with filings and swarf.:(
     
  11. gixxer

    gixxer Posting Addict

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    I did think this would happen if spring was tight fit ,but I don't like it too tight myself !!!. He he .

    I recently replaced a rear guide on a rws 52 which had grated up like I've never seen before ,the cylinder was full of it and I mean full the only thing I could see to have caused it was a rough inside of the spring with little lube.
    I even had to strip clean re lube the trigger unit it had got into.
     
  12. Mrman

    Mrman Donator

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    I havent had this yet. Is aluminium not harder then delrin?
     
  13. mattyts

    mattyts Donator

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    Its more to do with how it breaks down I think,it peels and goes all dusty,not a good material for the job IMHO

    Perhaps a steel washer inbetween?
     
    Last edited: Jul 28, 2014
  14. Tinbum

    Tinbum Delusions of adequacy

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    My kits are the result of many years of mucking around with every material and combo thereof you can think of. Aluminium has many uses, but I wouldn't use it inside a springer.
     
  15. Mrman

    Mrman Donator

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    Thanks il keep an eye on it! How soon did your aluminium guide deteriorate?
     
  16. Tinbum

    Tinbum Delusions of adequacy

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    It depends on the spring. My 97 ruined one in a morning at the club earlier this year.
     
  17. Mrman

    Mrman Donator

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    yes I can understand about the spring but I certainly haven't gone through one that quick. I estimate I probably put through well over 10k pellets on my last one and it was still good. Anyway thanks il keep an eye on things.
     

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