An adapter assembly for selectively interconnecting an end effector that is configured to perform a function and a surgical device that is configured to operate the end effector , the adapter assembly comprising: an outer tube having a distal end and a proximal end; a housing secured to the proximal end of the outer tube ; and a cable drive assembly supported by the housing and including: a worm gear ; a cable gear coupled to the worm gear and rotatable in response to rotation of the worm gear ; a capstan coupled to the cable gear and rotatable in response to rotation of the cable gear ; and a cable coupled to the capstan , the cable axially translatable in response rotation of the capstan to actuate a function of the end effector while connected to the distal end of the outer tube , characterised in that the cable drive assembly further includes a second worm gear , a second cable gear coupled to the second worm gear , a second capstan coupled to the second cable gear , and a second cable coupled to the second capstan , wherein the second cable is axially translatable in response to rotation of at least one of the second worm gear , the second cable gear , and the second capstan , wherein the capstan of the first cable gear defines a slot therein and the capstan of the second cable gear defines a slot therein, said slots being configured to selectively receive detents of a rotatable knob therein to enable tension in the cables to be adjusted upon rotation of the capstans via rotation of rotatable knob . an outer tube having a distal end and a proximal end; a housing secured to the proximal end of the outer tube ; and a cable drive assembly supported by the housing and including: a worm gear ; a cable gear coupled to the worm gear and rotatable in response to rotation of the worm gear ; a capstan coupled to the cable gear and rotatable in response to rotation of the cable gear ; and a cable coupled to the capstan , the cable axially translatable in response rotation of the capstan to actuate a function of the end effector while connected to the distal end of the outer tube , characterised in that the cable drive assembly further includes a second worm gear , a second cable gear coupled to the second worm gear , a second capstan coupled to the second cable gear , and a second cable coupled to the second capstan , wherein the second cable is axially translatable in response to rotation of at least one of the second worm gear , the second cable gear , and the second capstan , a worm gear ; a cable gear coupled to the worm gear and rotatable in response to rotation of the worm gear ; a capstan coupled to the cable gear and rotatable in response to rotation of the cable gear ; and a cable coupled to the capstan , the cable axially translatable in response rotation of the capstan to actuate a function of the end effector while connected to the distal end of the outer tube , characterised in that the cable drive assembly further includes a second worm gear , a second cable gear coupled to the second worm gear , a second capstan coupled to the second cable gear , and a second cable coupled to the second capstan , wherein the second cable is axially translatable in response to rotation of at least one of the second worm gear , the second cable gear , and the second capstan , <EOS>