This is what's right with The Industry®

Discussion in 'Downhill & Freeride' started by Jm_, May 9, 2018.

  1. Jm_

    Jm_ Turbo Monkey

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    We drilled rims all the time back in the day.




    We didn't die from it.
     
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  2. slimshady

    slimshady ¡Mira, una ardilla!

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    Excellent point. I was thinking of aluminium rims all this time. But since just a few crab0nz rimz have molded spoke/valve holes, I have to admit I'm not intimidated by thinking of taking my old, trusty 8mm bit to any of them.
     
  3. jonKranked

    jonKranked Press Button, Receive Stupid

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    oh i have too (drilled alu rims, not died tho). i even used to drill alex DH32's out for use at trials rims. carbon? no thanks.
     
  4. SkaredShtles

    SkaredShtles I love NEWCASTLE and will ONLY drink NEWCASTLE!!!!

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    Chicken-shit.

    :D
     
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  5. jonKranked

    jonKranked Press Button, Receive Stupid

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    i've talked to a buddy who is in the carbon industry, his general advice for drilling it is "don't". at least not with a regular drill and bit.
     
  6. rockofullr

    rockofullr confused

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    Why you no like drilling holes in your $1000 carbon wheelz?

     
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  7. Jm_

    Jm_ Turbo Monkey

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    People cut carbon steerers all the time.

    The only issue I can see is the exposed carbon fiber strands that you'd want to somehow protect or re-paint over, because they can cause corrosion if in contact with aluminum, like the valves.

    I mean, are we saying that you can't cut a carbon steerer either?
     
  8. jonKranked

    jonKranked Press Button, Receive Stupid

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    cutting isn't the same as drilling. it's not that it can't be done, but there are special tools for it. for cutting carbon you need a carbon specific blade. for drilling carbon, you're not gonna wanna use a all purpose drill bit from home derpot.
     
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  9. Jm_

    Jm_ Turbo Monkey

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    Lots of people seem to be doing it for droppers and the only issue seems to be a few companies say "don't do it, that area is not reinforced to support a hole", well, there's already a hole where your presta valve is. I do recall a slightly different drill bit, but otherwise can't imagine this is a big deal.
     
  10. johnbryanpeters

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    Drill it nao.
     
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  11. rockofullr

    rockofullr confused

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    The carbon layup may well be reinforced in that area. Drilling it will change the stress riser locations and severity.

    They sure as hell didn't run any stress analysis with extra custom drilling going on. So will it break? I dunno, but it's not designed to work that way...... Then again I never drilled speed holes in my old Kona rocker links so I'm a bit of a sissy.
     
  12. StiHacka

    StiHacka Compensating for something

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    i͓̽t͓̽ i͓̽s͓̽ fu͓̽l͓̽l͓̽ o͓̽f s͓̽t͓̽a͓̽r͓̽s͓̽
    Some rims have molded holes, I would not even think about drilling those.
     
  13. slimshady

    slimshady ¡Mira, una ardilla!

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    Indeed. But most of the stuff out there is drilled from the factory. And I'm pretty sure they don't use any NASA leftover robot for that.
     
  14. jonKranked

    jonKranked Press Button, Receive Stupid

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    Maybe not NASA, but the equipment they're using is sure as shit designed for the job, and isn't the kind of equipment your average ham fisted mountain biker has access to.
     
  15. canadmos

    canadmos Mater Slayer

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    Doesn't crankbrothers have carbon rims now?
     
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  16. jstuhlman

    jstuhlman We noticed.

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    here’s a simple solution. fuck carbon rims.
     
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  17. jonKranked

    jonKranked Press Button, Receive Stupid

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    upload_2018-11-13_10-13-26.jpeg
     
  18. 6thElement

    6thElement Schrodinger's Immigrant

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  19. rpet

    rpet Turbo Monkey

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    This is a small thing, but I've always liked EBC brake pads. Now that I'm back on Avids, who wants a lotta money for pads, I've been buying EBC Reds again. They are not the easiest to find, but I pleasantly discovered that the US distributor will ship them for free via Fedex Ground!

    https://perfectbrakes.com

    I just got 2 sets delivered in 2 days for $30.
     
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  20. toodles

    toodles Turbo Monkey

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    How do they go in the wet? I haven't run EBC Reds in years and can't remember muddy racing with them. I know they were great in the dry.
     
  21. lobsterCT

    lobsterCT Monkey

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    IMG_5073.PNG
     
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  22. mykel

    mykel Turbo Monkey

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    Really? Simple Brad-point bits that any decent woodworker has a drawer full of?
    Wow - I'm impressed. :weee:

    I figured it would be some titanium / unobtanium wonder bit only available from a small Japanese man working a coal forge in Scandinavia and priced at a measly 9 billion slotniks each. :think:
     
  23. Lelandjt

    Lelandjt Turbo Monkey

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    Thanks. I drill two or four 1/16" drain holes in all my carbon rims so I'll get that carbon specific bit.
    No failures after many years and many many rims using the most basic Dewalt bits.
     
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  24. Jm_

    Jm_ Turbo Monkey

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    You shut your dirty whore mouth!
     
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  25. rpet

    rpet Turbo Monkey

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    I don’t ride in the wet, so can’t answer.

     
  26. lobsterCT

    lobsterCT Monkey

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    Your wood bits are high speed steel perhaps? Titanium nitride coated? About $6-7 bucks for a 1/4" diameter? This is solid carbide - pretty expensive - around $45 for the 1/4" diameter size. So not quite the same, but as per Lljt's experience, yours would probably function to cut carbon, and probably better than a traditional point.

    I won't say either way about drilling holes in rims or not, I think there are a lot of factors to that question. I'll concede to the conclusion of the person who has the biggest data set to draw from. Or a lizard that could tell us the factory designed failure characteristics of a given rim at the valve hole. I drilled aluminum when I was younger and lighter without any issues or dependents. Never tried it on carbon at 240 present weight and family status. Theoretically a molded hole is much stronger than a drilled hole, because the continuity of the fiber is preserved. I've used simple west-system marine epoxy as well as the depot's finest for various fishing rod building type activities, and a little bit of that would seal any dry fibers.
     
    #266 -   Dec 6, 2018
    Last edited: Dec 6, 2018
  27. mykel

    mykel Turbo Monkey

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    Cobalt.


    I was a toolroom machinist in a past life, so don't play with cheap tooling. Just not worth it to drill 3 holes then have to head to the grinder to sharpen (wish I could sharpen Brad or Forstner bits at home)

    Whilst not carbide, it should do the job. Not that I would drill out a molded hole.
    Just commenting on the bit. Really was expecting something closer to a fine toothed diamond ceramic hole saw style bit.
     
    #267 -   Dec 6, 2018
    Last edited: Dec 6, 2018
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  28. sethimus

    sethimus Turbo Monkey

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    ethically sourced cobalt?
     
  29. 6thElement

    6thElement Schrodinger's Immigrant

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    free range organic.
     
  30. Electric_City

    Electric_City The orangutans are loose!

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    *"No steroids were used in the sourcing of this cobalt"
     
  31. mykel

    mykel Turbo Monkey

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    Of course.

    Do you really think I would use Cobalt of a questionable source to salt my thermonuclear weapons?

    Geez, some people. :rant:
     
  32. manhattanprjkt83

    manhattanprjkt83 Rusty Trombone

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    cruelty free grass fed cobalt.
     
  33. Lelandjt

    Lelandjt Turbo Monkey

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    Don't tell LB! Or actually do tell them that their non-angled nipples holes allow water in and it's gotta get out somehow.
     
  34. toodles

    toodles Turbo Monkey

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    So it won't work on enduro rims?
     
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  35. johnbryanpeters

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    No, it won't endurit.
     
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  36. jonKranked

    jonKranked Press Button, Receive Stupid

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    x-post Screenshot_20181207-144124.jpg
     
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  37. Lelandjt

    Lelandjt Turbo Monkey

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    Yes, I was very happy to receive that email and see that I don't have to give up a week of prime riding in the middle of September anymore.
     
  38. Gary

    Gary "S" is for "neo-luddite"

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    This thread seems appropriate

     
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