Well young man quite impressive. If you've accomplished all that in a short period of time. Young man I only respond to your quotes and as far as my fantasy I happen to live in the real world and work and deal with real people. All I'll say to you young man is that when you still make quotes like LUBRICANTS. NOTHING HAS CHANGED IN LAST 50 YEARS WHEN IT COMES TO LUBRICANTS. That makes me question your statement.Sir I was in automotive repair before your existence was even thought of.And to make an incorrect statement as you boldly did in bold letters. There was a time even before you were born. The new synthetic oils came into existence. I believe this falls as a change within your 50 year time limit.And so many other changes all you have to do is a little research.Young man I can remember back when we use the run the tractor on bacon oil. A lot of farmers back then use alternate oil to lubricate farm equipment. You can always tell when they were turning the fields because there was always a smell of bacon in the air. And young man if you own a shop and are a master mechanic you would never make a statement like you did in such bold letters.There is a big world outside of your shop.I have a question that most master mechanics that I know. Know the answer to. Young man I know this was well before your time. The crawler at NASA that takes the rockets out to the launchpad was having a problem burning out bearings and damaging pins. And as your Aware some of the top engineers and scientists work for NASA. So the operating engineers that actually ran the crawler and our responsible for its repairs and maintenance had to find a lubricant to solve this problem.(What did they end up using as a lubricant). I'll admit this is a tough question to answer my certified mechanic in Seattle did not know the answer to this question nor did my certified mechanic here in South Florida know the answer to this question. But a majority of operating engineer master mechanics know the answer. Now if that question is a little too hard for you. Here's one you can relate to being a shop master mechanic what dry lubricant is used in a majority of circumstances. Locksmiths uses This lubricant quite often.?USMC60
You are correct. These same cars do not need anything new. The OP did not bother to actually read what you said. He just wants to argue with you. Back on topic. All the machines the mint uses, still use lubricants. It's incorrect to say that none of them ever reach the dies. Even a trace will build up over time. Basic stuff that the OP already understands but he just wants to argue about.
And that is it, in its entirety. And if he doesn't feel vindicated, this will fester for days or perhaps weeks until he can come up with something else, no matter how ridiculous, to come out swinging with.
Idhair not entirely true as you know as well as I do the mint is very tight on what information they give about their equipment. Of what information I can find out on public sources about the equipment the mint uses. This equipment is up-to-date with the latest technology as far as maintenance free bearings and self contain bearings on working parts. And I'm sure if any kind of leakage occurs from one of them bearings which after extensive use they will leak. The operator is all over it and immediately replaces that bearing and continues production. I know of very few machine operators that start up there machine without a thorough inspection prior to starting it up. And most contain bearings will let you know when their seal has been broken. The only other piece of equipment that could possibly have contaminants leakage would be what I like to refer to as the machine gun press because basically that's what it sounded like when I actually heard it. And again those Teflon double seals on the RAM will basically give you signs of leakage. And from what I can find out on the upsetting machine basically has maintenance free bearings. Idhair had this discussion along while back. The information is out there and someone like me can take the time and effort to do the research why can't other members?USMC60
The things you're not thinking of is that those presses strike upwards of 600 coins per minute, that's 10 coins per second. And for an operator to recognize and catch the fact that some grease got on the dies he first has to see the coins that failed to be struck correctly as a result of that. Also realize that the operator doesn't just stand there and watch every coin as it is ejected from the press. In the first place it is impossible because they are coming faster than he can see them. In the second place they only check the coins at random. So, in between the time that the grease gets on the dies, and the operator catches it, how many coins do you think will be struck ? In less than 2 minutes there will be over a thousand of them. Now lastly, when the coins are struck through grease, they (meaning the mint) really don't care. Their job is to produce as many coins as possible as fast as possible. So they will not sort through every single coin in the bins searching for those struck through grease and remove them. They will just pass them on through the system. Yeah, once they do discover the problem they will stop the press, wipe the dies off, and start it back up again. But all those coins struck through grease will go out into circulation. Bottom line - coins still do get struck through grease, even today.
Stop. You are being too logical. It's a slow morning. What will we all argue about? I love the topic. It keeps all of our minds thinking about what is possible.
And there is another possible source of grease/oil coming in contact withthe die faces. Back withthe vertical strike presses the pnachets themselves were coated with a thin film of oil to help keep them from jamming in the feeding mechanisms. This oil, gathering dust etc could eventually build up on the die faces creating grease strikethroughs. Now I don't know if that has changed since the introduction of the horizontal strike presses but if not (After all the planchets still have to go through feeding mechanisms.) then your could still get a build up on the die faces. Also not ethat curved feeding tube in the image shown earlier. If oil from the planchets builds up in there it could eventually run down and drip into the coining chamber, or drops be carried by the planchets into the coining chamber.
I find that quite interesting could you please provide me a link so I can read the die preparation before production thank you Sir I'm not saying there's no debris contamination all I'm saying is grease is an unlikely factor in modern coin production sure contaminants come down the line from the upsetting machine there's contaminants broke off of each coin that has a rim burr As indicated in the photo All I know if a small piece of rim burr gets into the letter of a die I don't see where any grease was involved it's all a debris contamination.USMC60
Again it is likely and here is a documented piece of debris. No grease this is an embedded piece of silver which has been described as silver debris.I've read condors post and agree with him that debris comes down the chute from the upsetting machine but still no one has shown me where grease could possibly enter the system between the dryer and the upsetting machine and the press. The only possible means of oil contamination would be from the press itself. Believe me those seals where out on hydraulic presses especially at the speed this press is run at. But before this machine is put into operation the operator goes through it thoroughly and having personally work with Teflon seals and know the failure rate and the signs of a failure will generally be indicated in your pre-inspection before operation. On most Teflon seals they are pressure seals and I'm sure there's a variety of others but at least in hydraulics they work on pressure when a press sit idle with no pressure built up in the cylinder it is called static pressure. Teflon seals when they start to show where you will have visible signs of leakage. But during operation the seals go under pressure and in less is a major failure will not leak. This is my experience with Teflon seals in hydraulics for over 30 years. And like GD said the operator does not stand and watch every coin being struck it's impossible he has other duties to perform during striking operations and the inspector periodically checks coins for quality but not as often as you would think.
I just watched Suicide Squad and this thread makes me feel like I'm having a conversation with Harley Quinn but without the distracting good looks
Here's a clue that actually has the answer within it. PS. I believe that is one of the lubricants they tried wall trying to solve the problem along with almost every other lubricant we can think of. But this one actually solve the problem.
