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<p>[QUOTE=&quot;Sean Moffatt, post: 2575559, member: 72137&quot;]I do want to add my comnents to this post. While all filled dies / struck throughs are not from grease, there are plenty of other substances that can get stuck to the dies and blanks, grease is still present very close to the coining area. This is true for all the modern Schuler MR series and Grabener MP series coining presses. The die holders are coated in grease before they are installed in the press (as recommended by the manufacturer) and if the die setter is a little too liberal with the amount of grease applied the grease can squirt out of the clamped on die holder housings these mount in as well as eek out from around the collar. I do agree the modern presses are much cleaner than the presses built 30 years ago that had problems with oil dripping on the tables. Speaking of oil, modern high speed coining presses do not have hermetically sealed internals and oil redidue can accumulate in the coining area and get on a blank or smeared across the feed track which will find its way to the die. If a mint is not using carbide insert coining collars (amd many times even if they are), they must lubricate the blanks. This lubricant will build up with the ultra fine metal dust from hundreds of thousands of blanks passing through the feed system to create what I call &quot;metallic boogers&quot; that can get stuck on a blank, which will, of course, get stuck on the die when coined. </p><p>&nbsp;I have refurbished numerous US mint and other foreign mint pedigree presses, and beleive me the feed tracks must be scraped out with acetone or other solvent to remove this residue. The former US mint presses (and most other mint presses) that I have received have not been kept squeaky clean by any stretch of the imagination. The coining area is typically covered in a gooey, oily / greasy substance, as are most other surfaces. And it gets thicker the lower down you go.</p><p>&nbsp;One more note, Murphys law of high speed coining states that any thing that sticks to a blank before it is coined will stick to the die when coined so it can ruin as many coins as possible before being discovered or falling off. That is my experience anyway.[/QUOTE]</p><p><br /></p>

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