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Min or Max Saami Spec Reamers

 
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  #22  
Old 08-20-2011, 01:58 PM
Edd Edd is offline
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Re: Min or Max Saami Spec Reamers

Quote:
Originally Posted by azgutpile View Post
Where does a"Match Grade" reamer fall into all of this?
"Match Grade" is a term that most likely falls smack dab in the middle of the marketing department. I would only want a match grade reamer if I had a match grade barrel and was shooting match grade ammo that had been loaded with match grade bullets in a rifle that had been built with match grade tolerances. Where is George Carlin when you need him.
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  #23  
Old 08-20-2011, 05:55 PM
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Re: Min or Max Saami Spec Reamers

Match Grade and Custom drop-in,,,,,,,,,!!!!!!! Ken Snyder's got it right on manufacturing tolerances, nothing is exact. Neck diameter is about all most gunsmiths can measure on a reamer, most don't have a 'shadow graph' to be able to measure anywhere on the tapers. The finished chamber tells the story. I have had a couple of 'specials' made. On those Manson works within +.0005. I think most SAAMI spec reamers made that are for the custom trade are on the 'minimum' side.
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  #24  
Old 08-20-2011, 09:35 PM
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Re: Min or Max Saami Spec Reamers

kind of funny now that shortgrass mentioned floating a ream, personally I think they are a cats meow, with very good results. I know some guys that would rather run one of the set-true style chucks and they get real good results as well. The funny part is the "which end of the barrel goes in the chuck" debate - well I think its funny !
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  #25  
Old 08-21-2011, 07:13 AM
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Re: Min or Max Saami Spec Reamers

'Shadow graph' is the slang name for an Optical Comparator, which is a measuring device. It has nothing to do with chucks or holders.
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  #26  
Old 08-21-2011, 09:31 AM
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Re: Min or Max Saami Spec Reamers

Sorry about that, thought you mentioned "manson" floating ream holders. Maybe they are Mason I'll have to look! The first time I used a shadow graph was in 1985. Two different kinds 1 a comparator with a calibration grid and the other a profile scope that had interchangeable templates. Now days most of them are sitting in the corner of a grinding shop covered with coffee cups and dust. The new griniding equipment has a resolution of up to .000005, with their own measuring sensors. pretty much makes the old stuff obsolete. but sure was fine back in its day.
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  #27  
Old 08-21-2011, 11:01 AM
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Re: Min or Max Saami Spec Reamers

Manson makes a floating holder, but, his company also makes tools and does a da^% fine job of it, too. I've tried most all the tool makers we hear about on the web and some, very few have heard of, and I'll choose a Dave Manson reamer over most. His turn around times are very good and customer service is second to none. Tools from him are right the first time. As for 'floating holders', yes , I use one. Mine is unique to my lathe, as it was made after a couple of days of leveling and alinement and then all work possible was done buy feeding the work, held in the tail stock, into the tools held in the 4 jaw chuck. The same process used by machine manufactueres when they make tool holders for their machines (only they usually use collets). That tool holder becomes 'dedicated' to that particular place on that particular machine and may not be accurate if used on another machine. It makes it very easy to make a chamber the same size as the reamer. I use a 'floating' holder instead of a 'pusher' because my feed rates are higher than most use, made possible by, my home made, pressure flush coolant system. My 'shadow graph' has a cover over it, but not coffee cups and dust!
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  #28  
Old 08-21-2011, 12:00 PM
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Re: Min or Max Saami Spec Reamers

shortgrass I hear you loud and clear. I used to make my living by being a mech-elect for companys that built the equipment that many of us are using today. Your building of your own specialized equipment built specifically for your machine is absolutely the best way to get a job done correctly. The new super equipment is fantastic but whenever I ask my son-inlaw how much it would cost to manufacture parts with the tolerances I want, I don't know whether to laugh or tell my daughter to get a divorce. ( just kidding he's an outstanding young man) Someday guys like us will be history.
But for now we rule and the rest can only slobber on themselves.
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