How do I stop this bolt from spinning? (Steel bolt, Aluminum Housing) - Page 2
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  1. #26
    Join Date
    Dec 2009
    Location
    Las Vegas, Nevada, USA
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    531

    Re: How do I stop this bolt from spinning? (Steel bolt, Aluminum Housing)

    Quote Originally Posted by OPUS FERRO View Post

    zipzit




    I know you want to weld, but - 'Get it done, and get the check' - welding
    the box is backwards . . .

    "I want the bolt to be easily removable" - this dictates what you do . . .

    Measure: the width & depth of the bolt head gap - and the length of the
    bolt facit.

    Go to your Cold-Rolled cache: select size - and cut 'to bolt facit length'
    [scrape acceptable] . . . size with play [slop] . . .

    This is an Open-Face Fillet Joint - tack/weld across the ends only - any
    where else is excessive. Fuse/.035 filler - easy to fix/adjust [correction]?

    If this was a Solution Timed Event - It would be done in less than 10 Min.
    with coffee and NPR . . .

    hth

    Opus

    ps - See post #12 . . .


    .
    Opus,
    Honestly, not exactly sure what you said, but I think you want me to hand scrape a groove in the aluminum that is the width of the bolt head, just deep enough to catch the flats. That is really a great idea. (Hope I interpreted that correctly...) . And I do like National Public Radio..
    Zip.

    er.. wait.. #12... bar stock (huh) . cold rolled? (who has aluminum bar stock on hand. Does aluminum even come in cold rolled? ) . When I first read your note I was thinking cold chisel to cut the groove. I guess I could do a whole lot of aluminum build up drill on aluminum plate to get the thickness needed, carefully cut and tack weld at the ends, two sides... And that's a good idea.. I need the practice anyway.
    Last edited by zipzit; 09-20-2019 at 01:27 AM.

  2. #27
    Join Date
    Dec 2018
    Posts
    1,801

    Re: How do I stop this bolt from spinning? (Steel bolt, Aluminum Housing)

    Cut the slot in a bigger width piece after hole drilled, then mill the sides of the track to desired thickness. Try to mill that slot when the piece is to size, and all's ya gonna do is tear up the side walls...…..not enough support for the cutter radial forces...…….go big, then mill down from outside of walls.

  3. #28
    Join Date
    Dec 2018
    Posts
    1,801

    Re: How do I stop this bolt from spinning? (Steel bolt, Aluminum Housing)

    Or just take a dam piece of sheet metal, drill a hole in it for the bolt. Run the bolt thru the sheet metal, put the bolt in the casting with two square flats facing the casting walls, and use a press to deform the ears on the sheet metal to fit inside the slot. Like folding a box.

  4. #29
    Join Date
    Dec 2009
    Location
    Las Vegas, Nevada, USA
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    531

    Re: How do I stop this bolt from spinning? (Steel bolt, Aluminum Housing)

    Star washer first. If that works I'm done.

    I think what I'm going to do is try the corner fillet bead with a steel bolt on a simple piece of sheet aluminum with a drilled hole and see what happens. That way I don't risk an aluminum casting. I just want to know what will happen. Will the molten aluminum stick to the steel? Will it shrink as it cools? dunno. Now, I just want to know.

  5. #30
    Join Date
    Mar 2009
    Location
    MN
    Posts
    5,159

    Re: How do I stop this bolt from spinning? (Steel bolt, Aluminum Housing)

    So you're terrified of welding on the bolt, but welding on the aluminum casting seems like a good idea? You may want to think abou that a bit.

    A deformed fender washer will work like Sam had suggested. Or rough up the casting, Grease the bolt, and add a few globs of 5 minute jb weld.
    My name's not Jim....

  6. #31
    Join Date
    Jul 2008
    Posts
    2,224

    Re: How do I stop this bolt from spinning? (Steel bolt, Aluminum Housing)

    Quote Originally Posted by zipzit View Post
    What I really want to know is... what will happen if I try to do a corner joint weld between the head of the bolt and the casting, obviously focusing most of the heat on the aluminum?
    One way to find out!

    (Say goodbye to any heat treatment of the bolt afterwards, though, so lookout for that "immediately ensuing blood"!)

    Why not just jam the blade of a screwdriver between the bolt and the corner in the aluminum piece while you tighten to 20 ft-lb? Or use a spring washer?

    What with all this potentially "immediately ensuing blood" spraying around, I doubt NASA or Orbital or SpaceX or whoever is going to go for your plan.

    ETA: Never mind, I see it's not for a rocket engine gimbal, but for a skateboard truck. Since fatigue is apparently the issue here, this might help:

    http://www.boltscience.com/pages/fat...e-of-bolts.pdf

    See the last point (#10). It appears proper bolt torque is more important to fatigue resistance than the type of bolt or brand of bubblegum used to immobilize it...you might also want to consider the bolts to be "wear items" and replace them after a certain number of strain cycles (see the paper) to reduce the blood loss.
    Last edited by Kelvin; 09-20-2019 at 06:15 AM.

  7. #32
    Join Date
    Dec 2013
    Location
    Mount Tabor VT
    Posts
    6,051

    Re: How do I stop this bolt from spinning? (Steel bolt, Aluminum Housing)

    Carriage bolt.
    An optimist is usually wrong, and when the unexpected happens is unprepared. A pessimist is usually right, when wrong, is delighted, and well prepared.

  8. #33
    Join Date
    Jun 2018
    Location
    Florida
    Posts
    455

    Re: How do I stop this bolt from spinning? (Steel bolt, Aluminum Housing)

    Well, whatever you do I hope you get it right because I'd hate to see another skateboarder crash.
    ***********************

    CR

  9. #34
    Join Date
    Jul 2008
    Posts
    2,224

    Re: How do I stop this bolt from spinning? (Steel bolt, Aluminum Housing)

    Quote Originally Posted by CrookedRoads View Post
    Well, whatever you do I hope you get it right because I'd hate to see another skateboarder crash.




    Quote Originally Posted by zipzit View Post
    Now what would be KEWL is if they added a Hula Hoop!
    Last edited by Kelvin; 09-20-2019 at 09:14 AM.

  10. #35
    Join Date
    Jul 2018
    Posts
    13

    Re: How do I stop this bolt from spinning? (Steel bolt, Aluminum Housing)

    Purchase a CHEAP (inexpensive) 12 point socket & grind the outside diameter to fit in the pocket, I've done that many times as needed

  11. #36
    Join Date
    Dec 2010
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    SoCal-LA
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    9,258

    Re: How do I stop this bolt from spinning? (Steel bolt, Aluminum Housing)

    Why not use silicon bronze on the sides and keep as cool as possible. Should not hurt the head if you do it in steps and allow to cool between additions.
    Weld like a "WELDOR", not a wel-"DERR"
    MillerDynasty700DX,Dynasty350DX3ea,Dynasty200DX,Th ermalArc400GTSW,LincolnSW2002ea., MillerMatic350P,MillerMatic200w/spoolgun,MKCobraMig260,Lincoln SP-170T,PlasmaCam/Hypertherm1250,HFProTig4ea,MigMax1ea.

  12. #37
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    Jul 2008
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    2,224

    Re: How do I stop this bolt from spinning? (Steel bolt, Aluminum Housing)

    SiB would require you to heat the bolt head to 1400° or so ... I can't imagine that wouldn't normalize a quenched and tempered bolt head.

  13. #38
    Join Date
    Sep 2005
    Location
    Cave Creek AZ
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    2,833

    Re: How do I stop this bolt from spinning? (Steel bolt, Aluminum Housing)

    You guys certainly like to work! I would just use a battery impact on the nut.

  14. #39
    Join Date
    Apr 2010
    Posts
    2,417

    Re: How do I stop this bolt from spinning? (Steel bolt, Aluminum Housing)


    zipzit


    Quote Originally Posted by zipzit View Post
    . . . I want to use my mediocre TIG skills . . .
    I want the bolt to be easily removable . . .

    . . . Other tricks and hints?
    I know welding is the solution to almost everything - but consider
    drilling a hole into one of the head-faces and tap-in a roll pin.

    For olfactory satiation - you could burn a rod before and after . . .


    Opus






    .
    Last edited by OPUS FERRO; 09-21-2019 at 01:17 PM. Reason: . . . posting glitch . . .

  15. #40
    Join Date
    Dec 2013
    Posts
    1,370

    Re: How do I stop this bolt from spinning? (Steel bolt, Aluminum Housing)

    If the bolt is inclined to fail anyway, drill it all out and use a bigger bolt. Preferably one whose head will not spin in the casting socket.
    ---Meltedmetal

  16. #41
    Join Date
    Apr 2016
    Posts
    254

    Re: How do I stop this bolt from spinning? (Steel bolt, Aluminum Housing)

    Quote Originally Posted by Kelvin View Post

    Why not just jam the blade of a screwdriver between the bolt and the corner in the aluminum piece while you tighten to 20 ft-lb?
    Beat me to it... .. I do that all the time with nuts and bolts that are recessed and both sides are accessible. Much faster than looking for the right thinwall socket..

  17. #42
    Join Date
    Sep 2015
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    SE Pa
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    1,606

    Re: How do I stop this bolt from spinning? (Steel bolt, Aluminum Housing)

    Is this thing part of the space station?

  18. #43
    Join Date
    Mar 2009
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    MN
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    5,159

    Re: How do I stop this bolt from spinning? (Steel bolt, Aluminum Housing)

    Seems like most people in here don't know what this bolt does.

    If I'm understanding this correctly. That is the only thing holding the truck to the board. The bolt is used to adjust turning sensitivity. The head is only accessible during replacement. Maybe OP needs to post a pic of the whole assembly.
    My name's not Jim....

  19. #44
    Join Date
    Mar 2011
    Location
    Western Washington
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    4,051

    Re: How do I stop this bolt from spinning? (Steel bolt, Aluminum Housing)

    Here is an easy fix.... get a set of royal's

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  20. #45
    Join Date
    Dec 2011
    Posts
    283

    Re: How do I stop this bolt from spinning? (Steel bolt, Aluminum Housing)

    Thin steel plate to fit recess with hole for bolt to go through, bend one or two corners of plate to hit flat of hex and bolt won't spin anymore. Similar to the bend up tab that was used on axle bolts on old trucks with adjustable bearings.

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