A pipette tip coupling device for coupling a pipette tip to a pipette device ; the pipette tip coupling device comprising: a shank having a proximal end face and a widest shank portion with a shank diameter; a coupler body distal to the shank ; the coupler body having a widest coupler body portion with a coupler body diameter; a distal stem portion ; a distal end plate ; an open-ended interior circumscribing surface forming an open passageway extending longitudinally from the proximal end face through the distal end plate ; an elastomeric element disposed around the distal stem portion and adjacent to the distal end plate ; characterized in that : the coupler body diameter of the widest coupler body portion is greater than the shank diameter of the widest shank portion; and wherein the pipette tip coupling device further comprises: a pipette tip ball assembly circumscribing the shank comprising: a plurality of spherical balls ; and an annular ring shaped raceway body comprising a plurality of circumferentially spaced apart guide sockets for carrying the plurality of spherical balls , a plurality of circumferentially spaced apart circular ball openings for receiving and retaining the respective plurality of radially extended balls , and a plurality of retaining stakes . a shank having a proximal end face and a widest shank portion with a shank diameter; a coupler body distal to the shank ; the coupler body having a widest coupler body portion with a coupler body diameter; a distal stem portion ; a distal end plate ; an open-ended interior circumscribing surface forming an open passageway extending longitudinally from the proximal end face through the distal end plate ; an elastomeric element disposed around the distal stem portion and adjacent to the distal end plate ; characterized in that : the coupler body diameter of the widest coupler body portion is greater than the shank diameter of the widest shank portion; and wherein the pipette tip coupling device further comprises: a pipette tip ball assembly circumscribing the shank comprising: a plurality of spherical balls ; and an annular ring shaped raceway body comprising a plurality of circumferentially spaced apart guide sockets for carrying the plurality of spherical balls , a plurality of circumferentially spaced apart circular ball openings for receiving and retaining the respective plurality of radially extended balls , and a plurality of retaining stakes . the coupler body diameter of the widest coupler body portion is greater than the shank diameter of the widest shank portion; and wherein the pipette tip coupling device further comprises: a pipette tip ball assembly circumscribing the shank comprising: a plurality of spherical balls ; and an annular ring shaped raceway body comprising a plurality of circumferentially spaced apart guide sockets for carrying the plurality of spherical balls , a plurality of circumferentially spaced apart circular ball openings for receiving and retaining the respective plurality of radially extended balls , and a plurality of retaining stakes . a plurality of spherical balls ; and an annular ring shaped raceway body comprising a plurality of circumferentially spaced apart guide sockets for carrying the plurality of spherical balls , a plurality of circumferentially spaced apart circular ball openings for receiving and retaining the respective plurality of radially extended balls , and a plurality of retaining stakes . <EOS>