Bonus is explained as when the hole gets bigger there's more room for the mating part to be able to assemble. It's a 1 for 1 relationship. A micron bigger than the minimum hole size converts into a micron bigger in position.
You also have datum shift in the callout. Same general idea that as the datum surface varies more tolerance is allowed. However, it's not a one for one relationship and not for the faint of heart.
Bonus is explained as when the hole gets bigger there's more room for the mating part to be able to assemble. It's a 1 for 1 relationship. A micron bigger than the minimum hole size converts into a micron bigger in position.
You also have datum shift in the callout. Same general idea that as the datum surface varies more tolerance is allowed. However, it's not a one for one relationship and not for the faint of heart.
