Abstract: Apparatus for restoring drill buttons or like objects includes a support body and structure for positioning a drive shaft rotatable about its axis. Bearing structure secures the structure to the support body for rotation about a second axis at an angle to the first axis. The two axes intersect at the location of a grinding burr mounted to the shaft for restoring a button in engagement with the burr. A transmimssion is provided for imparting rotational drive to the shaft positioning structure so that the first axis revolves about the second axis.