ds wrote:.010 µm is 0.00001mm which is a ridiculous tolerance that very, very few in the world would possibly be able to achieve let alone measure. Aerospace/high precision tolerances are at and below say +/- 0.007 mm and even that is too much for a grinder.
I don't agree often with you, but in this case I do.
Denis got some numbers wrong.
ds wrote:I hight doubt claimed tolerance of less than 0.009mm on flatness. How is that measured and with what kind of instruments? Run-out maybe, flatness over 4" area, I doubt it.
You can only measure it on a lathe machine, but there you can get it better than 0,01mm
This one was measured before getting it revised.
ds wrote:You can't put Bugatti Veyron tires on Yugo and go over 250 mph with it...
Yes you can, but you cannot go over 250 mph with a Bugatti when the engine inside is from a Yugo