One could easily argue that the pitch diameter or the outside diameter of the boss or the OD of the flange or even the bolt circle itself is datum B. A center line as a datum is extremely ambiguous. Talk to design and get it in writing what they want.
One could easily argue that the pitch diameter or the outside diameter of the boss or the OD of the flange or even the bolt circle itself is datum B. A center line as a datum is extremely ambiguous. Talk to design and get it in writing what they want.