Compressor mishap

[addertooth]

Just machine a new cap-plug, with a J-groove on the wrench-cap face for a O-Ring. Then apply silicon oil to the O-Ring, and tap and screw down with whatever thread pleases you. I do it, and it is good to 4500 pounds/310 Bar.

It is always important to throw in a superfluous option, when several good options have already been proffered.

Be sure to have a Gelatin ballistic block aligned with the path of travel with the plug, there are too few good ballistics studies on high-velocity plug penetration

 

[markba633csi]

Yikes what a mess. Poor quality control.
-M

 

[Flyinfool]

Parallel threads are a lot harder to seal, they are intended to be used with a gasket or some other sealing device. That is why things you don't want to leak use tapered threads.

Man, sorry but I disagree with your statement. I'll take a straight thread and a sealing element all day long over a taper thread if I want something sealed. The threaded joint must be designed for it however.

It sure looks to me like you just agreed with me, You prefer straight threads with a sealing element and I said straight threads must be used with a gasket or other sealing device. Different words saying the same thing.

In the case of this air tank I doubt if the surface of the bung is machined to accept a sealing element. Or in your words "designed for it". Thus the consensus to use a tapered thread in this case.

 

[DLF]

Yikes what a mess. Poor quality control.
-M

Poor supplier management. I bet you this is not just a one time error and they used a whole batch of wrong plugs.

I am quite disappointed especially when this is advertised as “Made in Italy”. So it should have way better quality compared to the china built tools.


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[addertooth]

DLF,
You do realize that China has bought out a lot of companies in Italy, and flew in their own workers to operate the plants. This has happened to the shops which did the "fine Italian leatherwork". This is why they had one of the worst Covid spikes in Europe.

 

[DLF]

Let’s agree to disagree (about the Chinese)

I live in Europe and I like to think I am a well traveled guy. But never seen the case you described (factories full with Chinese workers). And I do work in engineering and have constant contact with many OEMs.

I mean it is cheaper to produce in China and ship it via container freight instead of bringing many many workers from China and paying then European wages and housing. If you want cheap you produce in mainland China, cheapish but better built is Taiwan and usually good quality means Europe or USA. But this is the subject of a different forum topic.

And Fini is one of the better brands, with tradition in making compressors.


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[addertooth]

DLF,
I agree why argue. People are free to google "Chinese workers in Italy" and form their own opinions.
This way, they aren't unreasonably influenced by our subjective experiences.

 

[NC Rick]

I don't think they brought those workers for low cost, I think they brought those workers because they can sew and work with leather. I know of one case of that precedent in California with a german immigrant I know who made motorcycle racing leathers.
@Flyinfool sorry I misinterpreted but yes, we agree. I have a rather rabid dislike for tapered pipe threads.

 

[sdelivery]

nothing holds like a good cross-thread.........

Years ago I started in a machine tool rebuild company, we specialized in Devliegs.
During the first week of my employment I was working with the shop Forman on a nearly finished machine...well within ear shot of nearly all the other employees.
The shop Forman told me they use loctite on a particular fitting that typically loosens during operations.
I responded with " cross threading is the same as locktite" with a straight face and no pause in what I was working on.
That was the day they realized I had a sense of humor

 

[DLF]

The 1/2x14 BSPT tap arrived today and I was able to chase the threads. Tapered threads are not common around here so before Christmas I ordered it online from UK.

Verdict: Definitely no cross-threading and the new plug screws in really nice


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