In the 26th Edition of Machinery's handbook there is a table of machining tolerances that can be expected for various machining operations. It references ANSA B4.1 - 1967 (reaffirmed 1987).
Similar to, but much broader than ISO 2768. ( that has fine medium and coarse tolerances for various features by size).
However It seems like pretty much all other references say B4.1 is about cylindrical fits only .
Even ANSI/ASME herself.
ISO 286: System of limits and fits
ANSI B4.1: Preferred limits and fits
ISO 2768-1: General tolerances for linear and angular dimensions
Has a typo-graphical error crept in over the years?
Is there some other ANSI BX.X standard that actually includes info similar to the tasty table in Machinery's Handbook 26th?
Similar to, but much broader than ISO 2768. ( that has fine medium and coarse tolerances for various features by size).
However It seems like pretty much all other references say B4.1 is about cylindrical fits only .
Even ANSI/ASME herself.
ISO 286: System of limits and fits
ANSI B4.1: Preferred limits and fits
ISO 2768-1: General tolerances for linear and angular dimensions
Has a typo-graphical error crept in over the years?
Is there some other ANSI BX.X standard that actually includes info similar to the tasty table in Machinery's Handbook 26th?
