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Thread: Nut centering tool for welding

  1. #1
    Supporting Member Tuomas's Avatar
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    Nut centering tool for welding

    First

    I know, there is weldable nuts.

    But, those need accurate hole where to be installed.
    Sometimes fitting takes a lot of time, still its possible that result is off centered.

    So, i made this tool.

    Nut centering tool for welding-fb_img_1612552425353.jpg

    Nut centering tool for welding-fb_img_1612552431366.jpg

    Nut centering tool for welding-fb_img_1612552435682.jpg

    Nut centering tool for welding-fb_img_1612552440281.jpg

    Idea is simple.

    Cone shape centers nut.
    When tool is tightened, it also clamps nut to its place.

    Material is copper, it prevents nut, or splatters to weld on to the tool itself. It also works as a backing, keeping threads of the nut in shape. If temperature rises too high.

    No need to chase threads after welding. ( Unless welds are messed up really bad )

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  2. The Following 22 Users Say Thank You to Tuomas For This Useful Post:

    Andyt (Feb 6, 2021), baja (Feb 6, 2021), bobs409 (Mar 16, 2021), DIYer (Feb 8, 2021), floyd_kenny (Nov 8, 2022), HobieDave (Jun 21, 2021), IAMSatisfied (Feb 5, 2021), jimfols (Feb 7, 2021), Jon (Feb 5, 2021), lassab999 (Nov 9, 2022), Metallurg33 (Nov 9, 2023), Moby Duck (Feb 8, 2021), NortonDommi (Feb 5, 2021), Philip Davies (Feb 12, 2021), Ralphxyz (Feb 5, 2021), rdarrylb (Feb 6, 2021), rebuilder1954 (Feb 6, 2021), RetiredFAE (Nov 8, 2022), Sleykin (Feb 5, 2021), Toolmaker51 (Feb 7, 2021), trevor_60_r (Nov 9, 2022), verticalmurph (Nov 9, 2023)

  3. #2
    Supporting Member NortonDommi's Avatar
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    Nice. Many mechanics make a similar tool for weld-on hydraulic fittings that has a turned down section at the end that is thread root diameter for locating the fitting nice and straight to the hole. If not Copper they need to be sprayed with anti-spatter and removed toot sweet after tacking.

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  4. The Following 2 Users Say Thank You to NortonDommi For This Useful Post:

    Moby Duck (Feb 8, 2021), Tuomas (Feb 6, 2021)

  5. #3
    Supporting Member Ralphxyz's Avatar
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    Do you have other sizes?

    Ralph

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    Supporting Member TrickieDickie's Avatar
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    Good idea....brass I have copper I dont

  7. #5
    Supporting Member Tuomas's Avatar
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    Quote Originally Posted by Ralphxyz View Post
    Do you have other sizes?

    Ralph
    M8 and M10 i haven't needed other sizes.

  8. #6
    Supporting Member Tuomas's Avatar
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    Quote Originally Posted by TrickieDickie View Post
    Good idea....brass I have copper I dont
    Brass works too.

  9. #7
    Supporting Member Toolmaker51's Avatar
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    Quote Originally Posted by Tuomas View Post
    Brass works too.
    For solid material, at considerable cost saving too.
    I wonder, if de-funding will create surplus or shortage of coppers.........
    Sincerely,
    Toolmaker51
    ...we'll learn more by wandering than searching...

  10. #8
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    Thanks Tuomas! We've added your Nut Centering Tool for Welding to our Welding category,
    as well as to your builder page: Tuomas's Homemade Tools. Your receipt:




  11. #9
    Supporting Member trevor_60_r's Avatar
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    Center nut in hole for tackwelding

    Hi Guys, in the past I have used Hex Socket Countersunk Screws to tack them in place with a small bit of never seize on thread and removed them before welding, as the nut can shrink on the screw.
    Name:  Countersunk screw.jpeg
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    Thanks Trevor
    Last edited by trevor_60_r; Nov 10, 2022 at 03:25 AM. Reason: insert image

  12. #10
    Supporting Member Toolmaker51's Avatar
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    Flathead/ Countersunk screws have potential for centering, if the receiving hole has equal angle (ie deburring). Some try to use countersunk holes as locators (like dowels) with misconception the angle performs to draw an item this way and that. Unlike Tuomas's screw which was machined (if in one chucking) will be concentric. Flat head screws despite looking the same are not, therefore rarely share a common axis.
    It's easy to prove. Fabricate a plate with 3 countersunk holes inline or triangular pattern, matching 3 flat head screws, even sockets, which are closest.
    Run the screws in and number them with felt tip. Locate the position accurately, via dial indicator, height gauge, depth mic whatever you have. Remove the screws and place in different positions than previously and re-measure. Another demonstration is multiple screws tried in a single hole, Clamp plate vertically, touch with an indicator and turn in a succession of screws; the plate will rise and fall as countersink contacts underside of head.
    Part of reason aircraft screws are 100° not 82° reduces head height, = thinner material, hence lesser weight. Another is that concentricity problem, raising a point of stress in said panel, that the increased angle and shallower hole moderate.

    For most things, the flathead screw will perform as you wish. Just be aware, assembly time, some tuning might be in order.
    Last edited by Toolmaker51; Nov 9, 2022 at 10:46 PM.
    Sincerely,
    Toolmaker51
    ...we'll learn more by wandering than searching...

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