Nut centering tool for welding

[Tuomas]

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.









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 )

[NortonDommi]

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.

[Ralphxyz]

Do you have other sizes?

Ralph

[TrickieDickie]

Good idea....brass I have copper I dont

[Tuomas]

Do you have other sizes?

Ralph

M8 and M10 i haven't needed other sizes.

[Tuomas]

Good idea....brass I have copper I dont

Brass works too.

[Toolmaker51]

Brass works too.

For solid material, at considerable cost saving too.
I wonder, if de-funding will create surplus or shortage of coppers.........

[DIYer]

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:

Nut Centering Tool for Welding by Tuomas

tags: centering, welding

[trevor_60_r]

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.



Thanks Trevor

[Toolmaker51]

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.