A pipette tip coupling device and pipette tip assembly comprising: a pipette tip comprising a circumscribing sidewall with an open interior passage including an interior surface and extending along a central longitudinal axis of the pipette tip between an open proximal end and an open distal end of the pipette tip ; a pipette tip coupling device is provided comprising: a shank having a proximal end face ; a coupler body distal to the shank ; wherein a diameter of a widest portion of the coupler body is greater than a diameter of a widest portion of the shank; 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 a pipette tip ball assembly is provided which circumscribes the shank 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 pipette tip comprising a circumscribing sidewall with an open interior passage including an interior surface and extending along a central longitudinal axis of the pipette tip between an open proximal end and an open distal end of the pipette tip ; a pipette tip coupling device is provided comprising: a shank having a proximal end face ; a coupler body distal to the shank ; wherein a diameter of a widest portion of the coupler body is greater than a diameter of a widest portion of the shank; 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 ; a shank having a proximal end face ; a coupler body distal to the shank ; wherein a diameter of a widest portion of the coupler body is greater than a diameter of a widest portion of the shank; 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 a pipette tip ball assembly is provided which circumscribes the shank 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>