Bar contact improvement

A sleeve for coupling a tool to a tool holder, comprising:

• an outer surface having a length between first and second ends;
• defined by an inner surface having a length between the first and second ends, an internal chamber having a longitudinal centerline;
• and
• wherein the outer surface includes two or more regions having a third perpendicular distance from the longitudinal centerline separated by two or more regions having a fourth perpendicular distance from the longitudinal centerline that is different from the third perpendicular distances.

A sleeve for coupling a tool to a tool holder, comprising:

• an outer surface having a length between first and second ends;
• defined by an inner surface having a length between the first and second ends, an internal chamber having a longitudinal centerline;
• wherein the inner surface includes two or more regions having a first perpendicular distance from the longitudinal centerline separated by two or more regions having a second perpendicular distance from the longitudinal centerline that is different from the first perpendicular distance;
• and
• wherein the outer surface includes two or more regions having a third perpendicular distance from the longitudinal centerline separated by two or more regions having a fourth perpendicular distance from the longitudinal centerline that is different from the third perpendicular distances.

A bushing for coupling a tool to a tool holder, comprising:

• an outer surface having a length between first and second ends;
• defined by an inner surface having a length between the first and second ends, an internal chamber having a longitudinal centerline;
• and
• wherein the inner surface includes two or more contact patches separated by a rotation about the longitudinal centerline (longitudinal strip of the inner surface).