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Author Topic: Tea-based problem!  (Read 1447 times)
Dave the Troll
Zeppelin Captain
*****
United Kingdom United Kingdom


Corporal Grease - Her Majesty's Own Mars Engineers


« on: April 01, 2010, 11:09:28 am »

I have recently purchased this from eBay.  I intend using it on a fire to keep me supplied with tea, while looking as though I have been doing so for years (hence the choice of a nicely battered one).

The auction actually lies (in my favour).  The nut is not missing, it was inside.

So here is my problem.  I have a brass knob with a ~5mm plain shaft, that goes through the copper lid of the kettle and then push fits through the square brass nut on the inside.  It stays on some of the time when I use it to remove the lid.

How do I make it permanently fixed?

I see several options.
(a) I braze/solder/weld it.  I have no skill in this area.
(b) I glue it.  What kind of glue would withstand the tugging and the heat?
(c) I beat the hell out of "rivet" to squash it around the nut.

Thoughts?
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Endeavour Cull
Snr. Officer
****
Netherlands Netherlands



« Reply #1 on: April 01, 2010, 11:45:25 am »

I like to give give you my thoughts on this one.

This would be my no 1 choice:

If the shaft has been made from a relative soft material (steel or copper) then my choice would be the battering (It becomes a rivet then).
You can soften steel by heating it up to a cherry red color glow. This works only with a plain steel, not stainless or whatever.
Just try, it can not make it worse only do not heat it up to the melting point of  the knob.


This would be my second:

You can not solder steel so that option only is possible with a copper, brass or bronze shaft. And the soldering material has to have a relatively high melting point (>250 degrees celcius).


This would be my first and a half choice because i have the tools for making screwthread:

Make a thread (M5) on the shaft with a fitting nut to finish. The nut has to preverably been made out of stainless or bronze.
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Captain Shipton Bellinger
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Why the goggles..? In case of ADVENTURE!


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« Reply #2 on: April 01, 2010, 01:45:43 pm »

Very much a cheap-and-cheerful suggestion - how about squishing the nut very slightly with a vice or hammer so that the (?threaded?) shaft is a firmer fit.

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Capt. Shipton Bellinger R.A.M.E. (rtd)

Herr Döktor
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Governor
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Herr Döktor, and friend.


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« Reply #3 on: April 01, 2010, 02:11:45 pm »

Cut a thread onto the shaft, and use a brass nut of the apposite dimensions.

Then make a nice cup of tea.

Smiley
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Dave the Troll
Zeppelin Captain
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United Kingdom United Kingdom


Corporal Grease - Her Majesty's Own Mars Engineers


« Reply #4 on: April 01, 2010, 02:52:54 pm »

The knob is brass (along with its shaft) and isn't currently threaded.
The 5mm is a guess.

I like the idea of cutting a thread.  I'll see if we have dies/taps (or whatever it is I need - the people I ask will know!) here at work.

I also like the good Döktor's suggestion of making a nice cup of tea.

I might have known that given three suggestions, you'd suggest (d).
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Endeavour Cull
Snr. Officer
****
Netherlands Netherlands



« Reply #5 on: April 01, 2010, 03:27:45 pm »

......
I also like the good Döktor's suggestion of making a nice cup of tea.


Stupid me! That should have been my first choice of coarse.
(One doesn't need a lid to make a perfect cup of tea.)
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Dave the Troll
Zeppelin Captain
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United Kingdom United Kingdom


Corporal Grease - Her Majesty's Own Mars Engineers


« Reply #6 on: April 01, 2010, 03:39:14 pm »

Stupid me! That should have been my first choice of coarse.

Not Stupid.  Just not British.

(One doesn't need a lid to make a perfect cup of tea.)

One does.  Since the water within the teapot must maintain the perfect temperature for the perfect period of time but too much evaporation and thus cooling will occur without the lid.
The missing lid on a kettle, however, will just result in a slower boil.
The missing knob on the lid on the kettle will only result in an aesthetic discrepancy and the requirement for prising with a teaspoon before the kettle can be filled.

I now have in my possession one set of dies.  Thread cutting (dying?) will occur this evening, then I'll discover that I do not have an appropriate nut!
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Endeavour Cull
Snr. Officer
****
Netherlands Netherlands



« Reply #7 on: April 01, 2010, 06:58:24 pm »

How could i ever think that i know anything about a perfect cup of tea. I was out of my wits to even think about saying that to a senior in rank aaand Bbbrrritisjh.   
Thank you for pointing that out, Sir. Grin

Good luck with the thread cutting!






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Mr. Boltneck
Zeppelin Admiral
******
United States United States


« Reply #8 on: April 01, 2010, 07:30:03 pm »

On the off-chance that threading fails to work for you, you could drill a hole perpendicular to the axis of the shaft, slide the "nut" onto it past the hole, and insert a retaining fastener. This last could be a taper pin, cotter pin, or small nut and bolt, either brass or stainless steel. This should not need to be a hugely strong mission-critical fitting. Unless, of course, I underestimate your teakettle-fu.
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Dave the Troll
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Corporal Grease - Her Majesty's Own Mars Engineers


« Reply #9 on: April 01, 2010, 08:52:53 pm »

So the whole thread cutting thing was a non-starter.  I have M5 dies.  I have M6 dies.  The M6 die slips over neatly, so no go.  The M5 was far too small.

So, I took it into the garage.  Heated it with a blow torch (not too hot, since it is the wife's one for creme brulee).  And I hit it with a hammer.

It now fits nice and firmly (and has a couple more bents bits of character).

Thank you all for your help and advice.






Mmmmm, tea.
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Endeavour Cull
Snr. Officer
****
Netherlands Netherlands



« Reply #10 on: April 01, 2010, 10:23:08 pm »

your welcome!....enjoy.
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Herr Döktor
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Governor
Master Tinkerer
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Herr Döktor, and friend.


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« Reply #11 on: April 01, 2010, 11:56:18 pm »

Goes to prove that when all else fails fire and hitting it with a hammer succeeds.

Wink
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Dave the Troll
Zeppelin Captain
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United Kingdom United Kingdom


Corporal Grease - Her Majesty's Own Mars Engineers


« Reply #12 on: April 02, 2010, 09:41:15 am »

And the old adage

"If brute force didn't succeed you just didn't apply enough."

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Prof Marvel
Zeppelin Captain
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United States United States


learn from history, or be doomed to repeat it


« Reply #13 on: April 03, 2010, 12:01:24 am »

My Dear Dave -
I am gratified to see that you have (at least temporarily) resolved your handle issue. It has been my experience that a "force fit' will eventually fail through use, and thus I offer an alternative - a porcelain knob, with threaded screw. When your existing knob finally fails, you might find a porcelain knob to be both heat-resistant and fitting with the piece.

    http://tinyurl.com/yb46mvs

yhs
prof marvel
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Dave the Troll
Zeppelin Captain
*****
United Kingdom United Kingdom


Corporal Grease - Her Majesty's Own Mars Engineers


« Reply #14 on: April 03, 2010, 01:47:15 pm »

I had considered the solution of just buying a new knob.  I prefer the brass to the porcelain, but a quid at homebase would indeed solve the problem.
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