The quasi axis of the ranging module (6) parallels the axis of the hollow rod (4).

The elongated piston rod is reciprocatingly mounted within the cylinder and extends through the cylinder for movement along a piston rod axis.

The plug axle has an axis A-A' which is offset so as not to bisect with the axis of the stem (4a).

The housing has two radial walls, each extending along a radial line from an axis of the rod.

The anchoring shaft is fixed on the housing or the interface body.

The interface body and the housing use the axis of the anchoring shaft as a rotational axis to rotate in opposite directions.

The actuator is pivotally connected to the pivot member for pivoting about a second link axis, which is parallel to the piston rod axis.

May be implemented with a shaft enclosure and expander that may be coupled with a screw aligned along an axis parallel to the axis of the shaft.

The cutting tip may be configured to torsionally rotate back and forth on an axis perpendicular to a centerline of the shaft (e.g., rotation around a y-axis).

A chuck (40), rotatable about an axis of rotation, is located in the workspace for holding and rotating the work piece about an axis co-axial with the axis of the rod.

The shaft defines a shaft axis.

The lift pin includes a pin shaft.

The elongate stem part (4) defines a stem axis and the concave bearing surface (12) of the epiphyseal part defines an epiphyseal axis.

The shank has a longitudinal axis.

The shaft defines a longitudinal axis of the assembly.