My collar strike ministry.

He's a man on a mission.

 

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I never heard of the term "Collar strike" or "collar Straight".

 

I think you will find this link extremely helpful, I know I did.
I know I like to bring this link up, and bring up a photo of one of my coins, to compare with their photo.
I don't know I find it extremely helpful. And when the photos come up left click on the photo and you get a nice enlarged photo. I hope it helps
Collar strike
https://www.google.com/url?sa=t&rct...coin-errors/&usg=AOvVaw3BquDV6l71kGZxnR94Hfuf

 

Oh. Those.

Partial collars, tilted partial collars and what I always thought of as Broadstrikes.

Yes, of course I have heard of those. I just never heard anyone call any of them 'collar strikes" or "collar straights".

 

I just thought they had a well presented presentation,

 

Larry, here's part of the discussion I had with Stan Moffat. I think he knows a lot more about presses than both you and I do.
Since the mint is real tight about a lot of their procedures. I think this little conversation will interest you even though it's about doubling.

I believe explains the tonnage used in quarter production. And another fact that I was unaware of. The tonnage capability of the mints presses.
That's why they have these guidelines set up at every press no matter which press it is.
Stan Moffat Ejection doubling I like to classify under the umbrella of machine doubling. If the ecection was starting while the coin was still under coining pressure it would not tske long for the press to break. At the most an ejector might have a capacity of 10 tons. Since it takes somewhere around 75-ish tons to strike a quarter sized coin the force of coining would quickly breat yhe ejector oins levers, linkages, drive chain, or what ever ejector devices are in the type of press that is being used. I jush had at a consulting engagement last week a 600T press blew up the ejector pin that pushes the table die up out of the collar because there was a control fault that allowed the press to cycle without the ejector in the full retracted position. 1 cycle was all it took. So the ejector pushing off early is probably not the cause of ejection doubling, at least not for long before the press breaks

 

That sign is for making Working Hubs,
not the striking pressure for Dies making
coins.

There's a big difference between the two.

Most striking pressure for coins is 65 to 85 tons
of pressure, or thereabouts, depending on the
denomination/diameter, metal content, etc.

 

Thank you Fred. That's what I was trying to get across to the OP.

 

Sir I'm not gonna disagree with you. All I know as and operating Engineer when I went through the Denver mint tour.
I noticed at every press station I notice one of the safety signs at every operating press.
In my profession it's always extremely important to pay attention to safety signs.
So unlike other tourists that may been there with me I pick up on these kind of things.
I look for things that most people Won't think of looking for except for maybe another engineer.

And until I talked to Mr. Moffat I was unaware of the maximum operating pressure of the mint's commercial presses. 600 tons is quite a bit. And by his experience 75 tons is adequate for quarters. And of course this could very.

And Sir I figured the sign was self-explanatory.

Certain member

 

Please forgive my laziness in not rereading the entire thread, but...

Who is this Stan Moffat fellow, and what the hell is "Stan Moffat Ejection doubling"?

 

You have to forgive me I misspelled his first name sean Moffatt.
This gentleman is known as a master technician and instructor of various types of mint equipment. I promise Mr. Moffatt if I use His statements he would get credit.

His experience and knowledge that he has shared is greatly appreciated by me.
And it is my firm belief that this man knows what he's talking about. I don't know if I did this right but all think this is his profile
https://www.cointalk.com/members/sean-moffatt.72137/

I can't wait for his book to come out.

 

Larry it seems I should of been a little more informative as far as the sign was concerned. I guess I should've mentioned hub tonnage

 

Is it possible they used different signs at different types of presses?

 

Yes I believe that is most likely.
Since they are only following OSHA requirements.

When I went through the tour you are actually too far away at least I was to read what most of the signs were saying.

What surprised me most was a commercial press maximum tonnage.
You can find out all this information about mint equipment if you order the service manuals, for whatever machine you're interested in.
Or find someone like Mr. Moffatt who knows these machines inside out. It's a lot cheaper than what a service manual cost you.