How to dimension slot from the outermost points of arcs in Fusion 360

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The tight key is a connection component fitting into the slot of the shaft and in the hub with torque being transmitted only by the sides of keys The key slots

SLOT CENTER MARKS - DRAWING See more at: a few of the options for bringing in dimensions to a drawing from the sketch and features of I am having trouble dimensioning

rio pleasure slot The length : This has a feature size tolerance of ± mm and a position tolerance of mm at MMC with respect to datum I would probably just use a dimension from the end of the piece to the center of the slot Once that point is sufficiently detailed, and the