PART II WD-40 O-ring exposure effect results

Discussion in 'The Garage' started by klm4755, Jun 9, 2008.

  1. klm4755

    klm4755 Been here awhile

    Joined:
    Jun 19, 2006
    Oddometer:
    577
    Enclosed is the results of the O-ring experiment. The original plan was to assess the O-rings at specific long term intervals. However, to continue with this plan required me to continuously attend the containers. Some of the fluids needed topping off every few days and I did not see myself diligent enough to maintaining the containers over months. So, after 15x days of exposure, I’ll be measuring the failure load of each O-ring for the final evaluation.
    [​IMG]
    O-rings after 15 days
    [​IMG]
    removing the WD-40 exposed O-ring
    [​IMG]
    All O-rings removed and labeled
    [​IMG]
    The failure loads test fixture
    [​IMG]
    50 lbs capacity digital scale
    [​IMG]
    test set up, fill bucket with weights till failure
    [​IMG]
    test weights = 10 lbs 12 oz
    [​IMG]
    first O-ring in test the 15x day exposed carb cleaner specimen, add zip tie
    [​IMG]
    attach to scale hook
    [​IMG]
    attach zip tie to bucket with S hook
    [​IMG]
    empty weight = 6 oz
    [​IMG]
    slowly add weight and O-ring deflects and strains
    [​IMG]
    add all weight = 11 lbs 2 oz
    [​IMG]
    deflected shape with 11 lbs 2 oz
    [​IMG]
    measure deflection, although not used
    [​IMG]
    slowly pull with hand, reading digital values till failure
    [​IMG]
    carb cleaner failure load = 14.4 lbs
    [​IMG]
    Final results for all soaked O-rings
    Results of study:
    All the chemical had an effect on the strength levels. Based on the reduction in strength after 15 day continuous exposure, it appears WD-40 reduced and had a detrimental effect on the the strength of the O-ring (20% reduction after 15x days). Whereas, the Kerosene reduced the strength level by 12%. More rigorous investigation is required, however based on these results I’ll be using Kerosene to clean my X ring chain.
    [​IMG]
    ready to ride!
    Keithm
    #1
  2. larryboy

    larryboy Stable genius.

    Joined:
    Jan 9, 2005
    Oddometer:
    24,480
    Location:
    Über Alles,California
    Based on those results I'll be using nothing to clean my chains...just like now. :lol3


    Seriously..nice work!!! :thumb :thumb
    #2
    fujione likes this.
  3. teeedubya

    teeedubya Been here awhile

    Joined:
    Apr 7, 2007
    Oddometer:
    614
    Location:
    NYC
    Reminds me of some college physics experiments.:D
    #3
  4. markk53

    markk53 jack of all trades...

    Joined:
    Dec 20, 2007
    Oddometer:
    17,094
    Location:
    Delaware Ohio
    Just like Mythbusters would'a done... good on ya.
    #4
  5. duck

    duck Banned

    Joined:
    Mar 19, 2004
    Oddometer:
    10,403
    Location:
    Seattle (Berkeley with rain)
    1) Why does the tensile strength of an O-ring matter? Granted it's an elastic material but I think your test is a stretch. (Pun intended.)

    2) How come you didn't soak one in beer, one in bacon grease and one in mother's milk? This is ADV you know. :D
    #5
    DesertZuki, ACR and happyclam like this.
  6. xtphreak

    xtphreak from B4 "adventure bikes"

    Joined:
    Jul 21, 2004
    Oddometer:
    7,966
    Location:
    Back in WNC
    ok

    what would you think should be tested?

    compression?
    hardness/softness?
    abrasion resistance?

    how would you set up a repeatable / measurable test for each?

    this at least gives a representative data set for changes in the elastomer based on a control set and with multiple degrading fluids
    #6
  7. xtphreak

    xtphreak from B4 "adventure bikes"

    Joined:
    Jul 21, 2004
    Oddometer:
    7,966
    Location:
    Back in WNC
    which is what RK / Yamaha / Kawasaki say to use ... maybe the manufacturer actually does know best??? :D

    now consider that when I clean a chain with Kerosene, I wipe it clean afterwards, removing most of the kerosene, then I lube it, which no doubt displaces even more kerosene.

    Same if I use WD-40 (sprayed on a rag, NOT on the chain).

    Bottom line, kerosene (or WD-40) doesn't sit on the o-ring more than a few minutes, not days.

    great test :clap

    thanks for the effort :nod
    #7
  8. duck

    duck Banned

    Joined:
    Mar 19, 2004
    Oddometer:
    10,403
    Location:
    Seattle (Berkeley with rain)
    I was just being hyperctrical for kicks. I suppose this test is as good as any but focusing on hardness and compression would be ideal. Or running 8 bikes 100,000 miles over ten years.:rofl
    #8
  9. p_s

    p_s Nerdly Adventurer

    Joined:
    Jan 21, 2008
    Oddometer:
    204
    Location:
    Champagan, land o' the heathens
    It's interesting work. To be fair, you should run each test at least 3 times(and preferably much more) to see how much variation there is in the o-rings themselves or the experimental technique. I know that's three times as much work ... but maybe that's three times as good if you enjoy this sort of thing. :D
    #9
  10. DirtyDog

    DirtyDog Omnia mea mecum porto Supporter

    Joined:
    Apr 27, 2007
    Oddometer:
    12,300
    Location:
    Tulsa... it's OK
    Yep, REPLICATION is required for statistically significant results. But I'm sure you know that.:D

    I'd like to see a similar test with various lubes. I'm sure the differences would be much less, but interesting, I'm sure.
    #10
  11. DaFoole

    DaFoole Well Marbled... Supporter

    Joined:
    Jun 14, 2004
    Oddometer:
    4,962
    Location:
    BFE, SW Oregon/SF BayO'rhea
    Christ!! Even a guy with this much free time doesn't have THAT much free time....... :lol3 Thanks for your work and thanks for the info!

    :freaky
    #11
  12. anonny

    anonny What could go wrong?

    Joined:
    Mar 20, 2007
    Oddometer:
    6,687
    Location:
    Beautiful Revelstoke BC
    Your a genius! Glad you didn't do it all for me as 1 bike is belt drive 1 is shaft drive and the rest get cheap non o ring chains. Great read though.
    #12
  13. Hardleft

    Hardleft Vomit is not a food.

    Joined:
    Mar 13, 2008
    Oddometer:
    226
    Location:
    Boston
    Amazingly good post. Thanks for putting in all of this work and sharing it with us.
    #13
  14. Crisis management

    Crisis management Latte riders FTW!

    Joined:
    Feb 14, 2007
    Oddometer:
    1,973
    Location:
    New Zealand
    Great test and good indicative results, thanks for taking so much time to do this so thoroughly!
    So now it's clean with kerosene.....
    #14
  15. 30Bones

    30Bones Long timer

    Joined:
    Oct 5, 2005
    Oddometer:
    4,717
    Location:
    Cedar Rapids, IA
    People really care that much about chain lube? I use whatever I have on hand and even then I am bad about chain maintenance and have had 2 failures. Maybe I should steup up my regimin some. :lol3
    #15
  16. armatron

    armatron Adventurer

    Joined:
    Jan 20, 2007
    Oddometer:
    77
    I never clean my chains... I keep the area around them (guard, front sprocket cover) clean and I use pj1 blue every ~600 miles or so.. whenever the rollers look shiny. I can usually put about 16-18k on a decent chain before I replace it (by the 'pulling on the back sprocket part of the chain')
    #16
  17. Jonnylotto

    Jonnylotto Zipper Club with Clusters

    Joined:
    Jun 23, 2006
    Oddometer:
    15,868
    Location:
    Sunnyvale
    Geeked out testing :thumb

    Only thing I'd worry about is the tested sample being too small to account for production variations. :lol3
    #17
  18. trasko

    trasko Been here awhile

    Joined:
    Apr 19, 2006
    Oddometer:
    283
    Location:
    Bay area, CA
    Much appreciated Keith -- excellent work as usual. What would we do if it weren't for constant tinkering? :freaky
    #18
  19. ibafran

    ibafran villagidiot

    Joined:
    Apr 16, 2007
    Oddometer:
    1,383
    Location:
    chicagoland
    I have wanted to go to a cheap non-o-ring chain on my 95 trident. Do you run your chains on a 750cc or larger street bike? If so, what mileage do you get out of a standard chain? Which is cheaper to run on a cost per mile basis? Does the non-o-ring chain eat sprockets faster?
    #19
  20. Gordy

    Gordy SUPPORTER

    Joined:
    Dec 30, 2001
    Oddometer:
    31,322
    Location:
    NM
    Shouldn't this be in the virgins forum. :dunno
    #20