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Question gunsmith resources? o-ring and springs

Discussion in 'Anything Airgun Related' started by jimmyhackers, Aug 11, 2014.

  1. jimmyhackers

    jimmyhackers Well-Known Member

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    besides the wonder of ebay (which isnt very wonderful)

    where can i find all shape and sizes of oring and the same for springs.

    is there a one-stop shop to go to?

    do they do random selection bags of said items?

    any help is appreciated

    jim
     
  2. Nickg

    Nickg Posting Addict

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    Cromwell tools best price for o rings
     
  3. stalkerbarricade.22

    stalkerbarricade.22 Active Member

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    Google tw chambers they have spares for just about everything
     
  4. mattyts

    mattyts Donator

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    Poundshop for o rings.
     
  5. clbarclay

    clbarclay Engaging Member

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    For specific O rings try bearing suppliers, there are some reasonably cheap online bearing shops listing more common specifications and bearing suppliers should be able to source less common materials, profiles and sizes.

    For specific springs (not air rifle related) I use a local spring maker/supplier who has a wide selection of stock sizes and can custom make.
    http://www.springmasters.com/compression-springs/search.html
     
  6. darren 67

    darren 67 Newbie

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    Don't shoot me if I'm wrong but thought o rings for airguns was a different compound. What gun is it for?
     
  7. Greg1983

    Greg1983 Busy Member

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    Haha that's what I did for mine, plumbers selection box ;) they done the trick! Using in my xs78 and PCP pump :D

    [​IMG]
     
  8. jimmyhackers

    jimmyhackers Well-Known Member

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    thanks for the info..

    ive noticed they come in differnt hardnesses......what hardness will best suit my webely rebel.... or is it different per aplication within said gun or is it upto choice etc?
     
  9. mattyts

    mattyts Donator

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    Yep,had ours for ages,sizes go from massive to miniscule :D
     
  10. jimmyhackers

    jimmyhackers Well-Known Member

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    on another mad note.... to get rubber tubes to fit over stuff you can heat them up to make them more plyable. is this the same for orings

    i ask because....
    ive replaced the bolt oring in my webely rebel. ive used an 002 o-ring with a hardness of 90. (used on my beeman p17)

    the bolt seems to strech the oring a fair amount to get it over. not sure is its warping it or giving it a bit of a loose fit? wonder if heating it first i warm water would help relieve this?

    or perhaps a softer o-ring?
     
  11. Greg1983

    Greg1983 Busy Member

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    Also try coating the Oring in silicone grease as I know if I don't on my co2 rifle they expand/warp... But with the grease they don't :)
     
  12. oliver13

    oliver13 Donator

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    If you find you have to heat up an O ring to get it on it's probably the wrong size, it won't last as a a proper one, but that could be a long time, they're pretty resilient.

    I've got a couple of these sets, one metric & one imperial: http://www.screwfix.com/p/metric-o-...and Cleaning&gclid=CJXvyJGTjMACFYMewwoduikAIg

    I use them for a lot of things as well as airguns, occasionally I find they don't have the size I need or the material is wrong & I reckon there still will be plenty of sizes I never use, but it's handy having them.
     
  13. mattyts

    mattyts Donator

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    Your using the wrong size O ring for the bolt,if you're heating it up or stretching/deforming it to get it on.
     
  14. jimmyhackers

    jimmyhackers Well-Known Member

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    i think the original o ring had a smaller cross section. but it is an 002.

    it doesnt look deformed after fitting...just bigger than the original. after a bit(a lot) of googling i found out some filling of the gun was in order.

    ive filled the bolt catch latch and the bolt (where the catch attaches). polished the bolt oring seat. fitted a more powerfull but slightly shorter bolt spring.
    the pellet inlet port was catching the oring on the close and return action so i filled them down .this was the main problem with the new larger section oring, this also had half shredded the original oring replacing it.

    its back upto wonderfully wonderful standards. smooth firm and not a smidge of air leak like it was before. im starting to get why some people refer to this webely rebel as a peice of junk and some as a diamond in the ruff.

    thanks for the help guys
     
  15. oliver13

    oliver13 Donator

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    Are you lubing the O rings? it does help, as noted some sort of silicone lube is best, a lot of ordinary oils can attack certain O rings.
    I use the silicone grease I got from a dive shop for O rings in SCUBA kit & about £4 a small pot, I prefer grease because it will stay put - you don't want it getting into important metal to metal joints.
     
  16. jimmyhackers

    jimmyhackers Well-Known Member

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    yes i greased up with some synthetic axle grease i had lying about. still felt rather tight.

    either way im not getting any air leaks out of the bolt and loading port anymore so all is well im probably just paranoid.

    i might splash out on some 75 harness 002 orings instead of 90 hardness (only a few quid off of ebay)

    see if they're strechier/more plyable
     
  17. Dag

    Dag Pro Poster

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    Has anyone used Cromwell's O rings for Air Arms breech seals?
    Dag
     
  18. Nickg

    Nickg Posting Addict

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    Silicon attacks Nitrile O rings, regular grades of oil are best unless dieseling is going to be a problem, then you need oxygen safe grease
     
  19. oliver13

    oliver13 Donator

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    I don't think Silicone attacks any type of O ring, but it's a vast field so there's probably something out there that's susceptible, it you look at the attached table it's not brilliant for Silicone rubber, it just depends how exotic the O rings in your gun are.
    They probably aren't anything too special, as I said I use the silicon grease designed for SCUBA kit & haven't had any problems, those are supposed to be Nitrile or Viton seals, but they don't have any markings on so they could be anything really.
    Oxygen safe grease is probably related to Krytox so may be a problem if it gets mixed with normal lubricants, but I've no idea how bad is bad...
    http://www.standard-gasket.com/tech_specs/chem_res/chemical_resistance.htm

    Here's a link about scuba seals which is quite informative, you definitely don't want to buy that sort of stuff off the 'Bay...
    https://www.divegearexpress.com/hardware/orings.shtml
     

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