Patent ID: 7329076

Claim:
A hole position gauge for indicating the center axis of a tapped hole formed in a workpiece, the hole position gauge comprising: a driving head that can be used for installing the hole position gauge into the tapped hole in the workpiece and for removing the hole position gauge from the tapped hole in the workpiece; a shank having a center axis, the shank comprising an indicating surface, distinct from the driving head, said indicating surface extending radially past the outermost diameter of the driving head having a predetermined geometric alignment with the center axis of the shank and an expandable sleeve having a predetermined geometric alignment with the center axis of the shank, the expandable sleeve having an inside cavity including a tapered portion; a shaft slidingly positioned within the inside cavity of the sleeve, the shaft comprising a tapered portion mateable with the tapered portion of the inside cavity of the sleeve; and a driving device to translate the shaft with respect to the sleeve to pull the tapered portion of the shaft to engage with the tapered portion of the inside cavity of the expandable sleeve for expanding the expandable sleeve.