Adrian-VTA
Global Moderator
Adelaide, South Australia
Posts: 5,327 
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Post by Adrian-VTA on Jun 1, 2015 17:20:42 GMT -8
Hi Guys, This one just spectacularly failed a pressure test. I get my pressure tests done in a WITSCHI Proofmaster, which is the waterless style machine. It tests for gasket integrity and crystal deflection. This crystal clearly failed the crystal deflection test. It did OK on gasket integrity. So it's going to need a complete rebuild again as glass dust is all the way through it, and I suspect the pivot on the second hand wheel is broke, as it just flops around. But it's the sort of thing that can happen with off-spec crystals.  |
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Post by SpinDoctor on Jun 1, 2015 18:43:35 GMT -8
I suppose this is one reason why some watchmakers would take use aftermarket parts.
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cd_god
Is a Permanent Fixture
Finna set up a HOOD next door to your richie phuk suburban mansion
Posts: 12,300
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Post by cd_god on Jun 1, 2015 19:11:54 GMT -8
OUCH. I blame the AM bezel insert  |
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Adrian-VTA
Global Moderator
Adelaide, South Australia
Posts: 5,327
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Post by Adrian-VTA on Jun 1, 2015 19:27:41 GMT -8
The guy I get to do the pressure tests usually doesn't take aftermarket parts. It's just not worth it for him, as when the thing explodes the customer will blame him. Why would you want that? I suppose this is one reason why some watchmakers would take use aftermarket parts. |
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HiBeat
Global Moderator
SEIKO Iko Iko GDTRWS
Posts: 8,684
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Post by HiBeat on Jun 1, 2015 19:29:45 GMT -8
Sorry to see that, I get your resistance to using crap AM's. Live and learn I guess. You are taking this way more calmly than I would have.  |
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Adrian-VTA
Global Moderator
Adelaide, South Australia
Posts: 5,327
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Post by Adrian-VTA on Jun 1, 2015 20:02:26 GMT -8
It's life, apparently fairly common now with huge amounts of AM stuff out there. Luckily it's not a recent-ish quartz chrono that you can't rebuild. The guy that does the testing for me reckons he gets maybe one every month or two that explodes. Sorry to see that, I get your resistance to using crap AM's. Live and learn I guess. You are taking this way more calmly than I would have. |
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Post by SeikoPsycho on Jun 2, 2015 2:00:41 GMT -8
Just out of curiosity, Was it a brand name aftermarket crystal or a no name aftermarket crystal?
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Adrian-VTA
Global Moderator
Adelaide, South Australia
Posts: 5,327
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Post by Adrian-VTA on Jun 2, 2015 5:01:32 GMT -8
It wasn't from anyone we know specifically, and it wasn't an SK one. So it's a noname brand. Just out of curiosity, Was it a brand name aftermarket crystal or a no name aftermarket crystal? |
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Adrian-VTA
Global Moderator
Adelaide, South Australia
Posts: 5,327
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Post by Adrian-VTA on Jun 2, 2015 18:09:31 GMT -8
Just to re-iterate and be clear, this was a weird no name brand crystal and not one from Spencer or anyone else that we know.
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Post by Groundhog66 on Jun 3, 2015 6:56:01 GMT -8
Epic fail...wow.
Do you suppose that was a fail in the material, or design?
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sdoocms
Is a Permanent Fixture
Carl
Posts: 5,296
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Post by sdoocms on Jun 3, 2015 13:00:00 GMT -8
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camrok
Needs a Life!
Posts: 2,418
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Post by camrok on Jun 3, 2015 15:20:38 GMT -8
I learnt my lesson early on when an AM Crystal (if you can call crap glass a crystal) exploded in my press with a small amount of pressure on the crystal retainer ring!
Big fan of sapphire from Crystal times now as they send out gaskets with the crystal too.
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Deleted
Deleted Member
Posts: 0
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Post by Deleted on Jun 3, 2015 16:53:40 GMT -8
Epic fail...wow. Do you suppose that was a fail in the material, or design? Could be either but judging from the nice radial fractures, I would say design; ie the material was not up to the specs. |
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