Now this guy can blueprint an action
 

This is metal artwork www.gtrtooling.com . I'll bet his waiting list is real long

RE: Now this guy can blueprint an action
 

One question,how can somebody blueprint,an action to .0000001 of an inch when the firearm was NOT orginally made within those tolerances.One can,t pukt the metal back! vangunsmith

RE: Now this guy can blueprint an action
 

How does one go about measuring it:D

RE: Now this guy can blueprint an action
 

a millionth of an inch??? cut it heck... how can you even measure it without an optical comparator, microscope, MRI or one seriously sensative CMM... 1/1,000,000th of an inch... ummm you don't CUT those tolerances... you don't even grind those tolerances... you lap and polish and burn those tolerances... the suface would have to be nearly like glass otherwise the surface roughness itself would cause the dimension to deviate from the tolerance...

in machining... holding a tenth isn't all that difficult with quality equipment and procedures... any tighter and you have to start grinding to get to final dimension, most would grind anything less than .0005 when it comes to heat treated and tool steels.... plus one thing to keep in mind... cutting something to a dimension and tolerance is one thing... at one point or circumferance... toss in a little Geometric Dimensioning and Tolerancing on top of that for runout, concentricity, circularity, parallelism, true position etc and it's a whole nother world...

i do have a bit of skepticism with his bolt way to bushing clearances... those clearances are pretty tight for a dry sliding fit that will see a significant cycling usage and temperature range, not to mention any uneven moment on the action would very likely cause the bolt to bind in battery or contact surfaces to gaull...

some folks really don't comprehend what a thousandth of an inch is... let alone what half a thou is.... a piece of paper for example is about .0025 - .003 inches thick... and is thin enough to slice you like a razorblade....

Not bashing gre-tan, they manufacture some nice stuff... and i admire anyone who strives for perfection...

Jamie

RE: Now this guy can blueprint an action
 

That is not Gre-tan boasting that came from a post here. I like Gregs work a lot not too sure about the sleeving though. I thought that best left to benchrest guns..like you say a little grit and its over.. Anyone that can build a very tight rifle if he is any sort of gunsmith will have longer then a 4 week wait.

RE: Now this guy can blueprint an action
 

You tell me,you,re the one whom stated such facts,just wanting to know,likesome of the other people here. Thanks for any info you can give us.

RE: Now this guy can blueprint an action
 

Look at Ridge Runners post I mentioned nothing about those tolerances

RE: Now this guy can blueprint an action
 

sorry to also add to the confusion oldelk... i should have deciphered more clearly that i went through the link you posted and i was making the point to ridge runner as to the inability to hold a 1/1,000,000 th of an inch tolerance in normal machining... not that gre-tan was trying to achieve that level of precision...

Jamie

RE: Now this guy can blueprint an action
 

Rootsy, No problem

RE: Now this guy can blueprint an action
 

I am a machinist, and i can tell you when you fabricate parts, toleraces of .0001 are a true work of art. We have to fabricate gear and shaft combinations and press fit dowels that when the slip fit side is applied need to have tolerences at .0005, and I can tell you that the fit is so true that it almost makes it impossible to take the part apart. the part is so true and the friction is equal over such a wide surface that a human almost cannot apply enough equal force to remove it. Im not saying that Ridge is not telling the truth, but IF someone is making parts that are to a .0000001 tolerence, I would love to visit with him and learn a thing or two!!! I think I remember back to my training classes, that tolerences on Airplanes were in the range of .0001-.0005 and they are someof the tighest tolerences Ive ever heard needed for functioning commercial made parts.

RE: Now this guy can blueprint an action
 

I checked out that web site oldelk, and he does have his setup done to perfection! He is proclaiming runout to be in the .00001! I would love to spend a day with him just to watch it work!!! I guess the lathes and chucks I work with are just plain not capable of keeping runout to such a tolerence on a piecs of stock that is 22-26" long. :(

p.s. I thought that blue benchrest gun he did was UGLY!!!:) But a piece of art to say the least!!

RE: Now this guy can blueprint an action
 

Not something I'd use for hunting,benchrest shooting for sure,but with those tolerences the chances of the gun jamming or misfiring because
of dirt inadvertantly getting into the action is to high.I like my tolerences .003" for hunting. May not be as accurate but at least I know it will function in different environments.

RE: Now this guy can blueprint an action
 

Nula rifles are built to identical tolerances and they function perfectly. The only thing that may cause a problem in my opinion is the bolt sleeving that may be too tight.