Interesting thread, even though I have only skimmed the last few pages. All this talk of accuracy really has me shaking my head.
I have seen that pictures of measurements taken with calipers is conclusive proof that some products are indeed made to .0005 tolerances. Not the case at all..Calipers are not capable of measuring .0005, even though it appears that they do. ±.001 is the very best accuracy they are capable of as stated by the manufacturer (Mitutoyo website as a reference). Measuring the outside diameter for a .236 ±.0005 part, you would need a minimum of a micrometer that is capable of measuring .0001 such as the digimikes that Mitutoyo makes.
This information is to inform only. Both manufacturers probably have the capability to make parts to .0005 tolerances. I suspect most production manufacturers do.
The importance piece of information that people seem to overlook is the cost involved in the manufacturing process. Most of the machines that are capable of making parts to these tolerances in materials such as Ti (think production levels, running day and night) start at $80k and go up from there. This exampe is for a CNC mill only- Probably still need a CNC lathe, grinders etc to make a decent shop. Now think of all the tooling to outfit this machine, the cutters (endmills, carbide and HSS, drills, taps etc) These tools are expensive and they wear out and break at interval. Not to mention problems with the machine itself that require repair..Crashes, wear etc.
When you are talking about tolerances, and holding them..Cost goes up exponentially. Think those Ti slabs are cheap? Try scrapping one because you had to hold .0005 tolerance on a hole and it is at .0006. (guage pins to check this feature- deltronics is the brand name which are spendy too) Because that part is .0001 out of tolerance, how good do you feel about throwing that piece of Ti in the scrap bucket? Think some of those sneak through? Answer..Yes as the operator is human.
So, with this information, imagine yourself as the owner of any production company making these fine knives..Your employees do NOT make McMinimum..you yourself would hope not to make minimum wage and there certainly be returns because, like everything else, you simply cannot please everybody, there will be warranty issues/returns.
How much would you charge for your intellectual property as well as manufacture that knife to .0005 tolerances?
By the way- I have made some of the parts for CRK in the past when some parts were being made outside of CRK..One part in particular has a tolerance of +.0000 -.0002. (Read this plus nothing, minus two-tenths of a thousandths of an inch.) How many of these do you think went into the trash as they take even a different type of measuring system.
Anyway..food for thought.