| 摘要 |
A gage for measuring concentricity between a bore and a countersunk valve seat, said gage having a stem for insertion into the bore and a partially-spherical surface (24) on a spindle member for engaging the valve seat. The spindle member is rotated through 180 DEG to obtain the measurement, while a pair of gaging circuits indicate respective clearances between an upper extension of the stem and the spindle member at the theoretical center of the partially-spherical surface.
|
