When using the coordinate method to boring, if the center line of the two holes is not parallel to the coordinate axis, ensure that the hole tolerance is to be converted to the hole tolerance along the coordinate axis. The following describes an intuitive geometric calculation without the differential method and the dimensional chain principle to calculate the tolerance of the coordinates. As shown in the figure, the hole distance between the two holes A and B is L_(AB)±δ_L, along the x-axis, the tolerance of the y-axis hole position is ±δ_x (±δx=±δy), then the two holes A and B
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