I don't know what this true position on the hole is constraining. Bolt circle diameter or orientation of the hole maybe? Trying to determine if I need to measure the hole as a cylinder. Appreciate the help.
Imagine the part was a plate with a random group of holes and the same position callout. Datum A is one side of the plate. The callout is saying that we care about the location of the holes to each other but we don't care about how they relate to the edges of the plate.
This part is similar. The relationship of the holes to each other is what's important. The cylindrical Datum A is the only thing orienting and anchoring the holes. The holes have to be parallel to Datum A within .010 (plus bonus) while also being with a 0.010 diameter (plus bonus) to each other.
EXCEPT that the holes NEED to be in relationship to the 'shank' that is the "A" datum. So you level & origin 2 axis to that shank (4 DOF) and the holes can then (per that callout) be 'anywhere' around that 'flange', but they MUST be in relationship to each other (WITH the 'shank' being at zero in 2 axis) but the rotation about the shank can be 'anything'.
And technically, there is no such thing as a 'circle', only cylinders, so, yes, measure as cylinders as both ends must be within the CYLINDRICAL tolerance zone called out
EXCEPT that the holes NEED to be in relationship to the 'shank' that is the "A" datum. So you level & origin 2 axis to that shank (4 DOF) and the holes can then (per that callout) be 'anywhere' around that 'flange', but they MUST be in relationship to each other (WITH the 'shank' being at zero in 2 axis) but the rotation about the shank can be 'anything'.
And technically, there is no such thing as a 'circle', only cylinders, so, yes, measure as cylinders as both ends must be within the CYLINDRICAL tolerance zone called out
