Replacing the bubble
Arthur Goodwin | 28/04/2020 19:45:46 |
71 forum posts 45 photos |
Over the moon when I won this on ebay. Got it for a tenner, bargain I thought till it arrived today. The glass phial is cracked and the bubble has escaped. Tried to source a replacement but everybody seems only to have up to 11mm in diameter. The Rabone tube has an i. D of 14mm. Does anybody a, have one theycansell or b, have any idea where to get one from
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Grindstone Cowboy | 28/04/2020 19:53:03 |
1160 forum posts 73 photos | I'd be inclined (sorry, not intended as a pun) to make up some tubular spacers and use the 11mm ones. Or these people might be able to help - no connection, just searched for Rabone level spares. Rob |
Oven Man | 28/04/2020 20:50:59 |
![]() 204 forum posts 37 photos | I picked up one of these from Aliexpress in China. Don't know how the accuracy compares with the real thing but better than a broken one. |
John Haine | 28/04/2020 22:30:30 |
5563 forum posts 322 photos | I think there was an article on baking precision bubbles in MEW in the early days... |
Clive Hartland | 28/04/2020 22:35:11 |
![]() 2929 forum posts 41 photos | The dia. of the bubble tube can be anything you can get. better if you can get one that has lines etched on it. Mounting a bubble smaller than the tube dia.is easy using some paper made into a sort of concertina form, folding it layer by layer till you get a sliding fit. cap/fill the ennds with plaster of paris making sure that the sealing point is clear and under no pressure from the plaster of paris. |
Dennis WA | 28/04/2020 22:43:50 |
![]() 79 forum posts 5 photos | See also the 2017 thread by Andrew Tinsley https://www.model-engineer.co.uk/forums/postings.asp?th=129638
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John Haine | 29/04/2020 09:18:55 |
5563 forum posts 322 photos | Posted by John Haine on 28/04/2020 22:30:30:
I think there was an article on baking precision bubbles in MEW in the early days... Well, it might be possible to bake one, but I think I meant "make"... |
Arthur Goodwin | 29/04/2020 09:46:56 |
71 forum posts 45 photos | Thank you guys |
Robin King | 29/04/2020 09:50:27 |
137 forum posts 1 photos | Posted by John Haine on 29/04/2020 09:18:55:
Posted by John Haine on 28/04/2020 22:30:30:
I think there was an article on baking precision bubbles in MEW in the early days... Well, it might be possible to bake one, but I think I meant "make"... That's a shame, I was looking forward to a recipe for 'bubble cake' ...... |
Andrew Tinsley | 29/04/2020 09:51:50 |
1817 forum posts 2 photos | I can confirm that the paper concertina and plaster of Paris method of repair works very well indeed. I am afraid that I have forgotten the source of the new capsule, but one of the above replies gives a starting point. The main problem was getting the end cap off without damaging it, putting it back on was almost as bad! It was a force fit on my example.. Andrew. |
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