A device for removing tissue, the device comprising: a cutting device having an elongated outer member and an elongated inner member received at least partially within the elongated outer member, the elongated outer member including a cutting window near a distal end thereof; and a driving assembly coupled to the cutting device such that the driving assembly is configured to cause the elongated inner member to rotate and move linearly relative to the elongated outer member of the cutting device, the driving assembly including: (i) an inner hub that is configured to couple with a motor to rotate the inner hub at a first rotational speed, (ii) a helical member positioned within an outer hub that is configured to engage with the inner hub to lock relative rotation therebetween such that the driven helical member rotates at a first rotational speed, (iii) a translation piece disposed in a groove (156,158) of the helical member such that the rotary driving of the inner hub results in the helical member moving linearly; characterised by (iv) a planetary gear assembly including a fixed ring gear, a plurality of planetary gears, and a sun gear, the sun gear being coupled to the elongated inner member of the cutting device such that the sun gear and the elongated inner member rotate at the same rotational speed and move linearly at the same linear speed, each of the plurality of planetary gears engaging the fixed ring gear, the sun gear being positioned between the plurality of planetary gears such that the plurality of planetary gears engage the sun gear and cause the sun gear to rotate at a second rotational speed that is different from the first rotational speed and wherein the planetary gear assembly is configured to engage with the helical member such that linear movement of the helical member causes linear movement of the sun gear and the elongated inner member of the cutting device. a cutting device having an elongated outer member and an elongated inner member received at least partially within the elongated outer member, the elongated outer member including a cutting window near a distal end thereof; and a driving assembly coupled to the cutting device such that the driving assembly is configured to cause the elongated inner member to rotate and move linearly relative to the elongated outer member of the cutting device, the driving assembly including: (i) an inner hub that is configured to couple with a motor to rotate the inner hub at a first rotational speed, (ii) a helical member positioned within an outer hub that is configured to engage with the inner hub to lock relative rotation therebetween such that the driven helical member rotates at a first rotational speed, (iii) a translation piece disposed in a groove (156,158) of the helical member such that the rotary driving of the inner hub results in the helical member moving linearly; (i) an inner hub that is configured to couple with a motor to rotate the inner hub at a first rotational speed, (ii) a helical member positioned within an outer hub that is configured to engage with the inner hub to lock relative rotation therebetween such that the driven helical member rotates at a first rotational speed, (iii) a translation piece disposed in a groove (156,158) of the helical member such that the rotary driving of the inner hub results in the helical member moving linearly; (iv) a planetary gear assembly including a fixed ring gear, a plurality of planetary gears, and a sun gear, the sun gear being coupled to the elongated inner member of the cutting device such that the sun gear and the elongated inner member rotate at the same rotational speed and move linearly at the same linear speed, each of the plurality of planetary gears engaging the fixed ring gear, the sun gear being positioned between the plurality of planetary gears such that the plurality of planetary gears engage the sun gear and cause the sun gear to rotate at a second rotational speed that is different from the first rotational speed and wherein the planetary gear assembly is configured to engage with the helical member such that linear movement of the helical member causes linear movement of the sun gear and the elongated inner member of the cutting device.