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 diameter of the widest coupler body portion is greater than the diameter of the widest shank portion; and a pipette tip ball assembly circumscribing the shank is provided comprising: a plurality of spherical balls ; and a ring-shaped raceway body comprising: a plurality of circumferentially spaced apart guide sockets for carrying the plurality of spherical balls ; and a plurality of circumferentially spaced apart circular ball openings for receiving and retaining the plurality of spherical balls . 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 diameter of the widest coupler body portion is greater than the diameter of the widest shank portion; and a pipette tip ball assembly circumscribing the shank is provided comprising: a plurality of spherical balls ; and a ring-shaped raceway body comprising: a plurality of circumferentially spaced apart guide sockets for carrying the plurality of spherical balls ; and a plurality of circumferentially spaced apart circular ball openings for receiving and retaining the plurality of spherical balls . the diameter of the widest coupler body portion is greater than the diameter of the widest shank portion; and a pipette tip ball assembly circumscribing the shank is provided comprising: a plurality of spherical balls ; and a ring-shaped raceway body comprising: a plurality of circumferentially spaced apart guide sockets for carrying the plurality of spherical balls ; and a plurality of circumferentially spaced apart circular ball openings for receiving and retaining the plurality of spherical balls . a plurality of spherical balls ; and a ring-shaped raceway body comprising: a plurality of circumferentially spaced apart guide sockets for carrying the plurality of spherical balls ; and a plurality of circumferentially spaced apart circular ball openings for receiving and retaining the plurality of spherical balls . a plurality of circumferentially spaced apart guide sockets for carrying the plurality of spherical balls ; and a plurality of circumferentially spaced apart circular ball openings for receiving and retaining the plurality of spherical balls . <EOS>