A hypocycloid reduction assembly, comprising: an upper housing having a top portion and a bottom, portion, the top portion having a first opening and the bottom portion having a second opening, the first opening and the second opening defining a passage through the top portion and the bottom portion, the passage extending along a first axis; the top portion being configured to interface with a tool; the bottom portion having an internal surface and an external surface, the internal surface having a disk receptacle; a drive shaft, having a top segment, a middle segment, and a lower segment; the top segment being configured to pass through the passage of the upper housing and to interact with the tool, the top segment having a first diameter and having a centerline aligned with the first axis; the middle segment having a second diameter that is greater than the first diameter, and having a centerline aligned to a second axis, the second axis being parallel to the first axis and positioned a first distance away from the first axis,; the lower segment having a third diameter that is less than the second diameter, and having a centerline aligned with the first axis; a disk assembly; characterized in that the disk assembly comprises: a plurality of disks, each having a body and a plurality of lobes positioned radially around the body, the lobes being configured to engage the disk receptacle in the upper housing, the body having an opening extending therethrough, the opening being configured to engage with the middle segment of the drive shaft; and, a lower housing configured to engage with the lower segment of the drive shaft, wherein said lower housing further comprises a disk receptacle configured to engage one of said plurality of disks. an upper housing having a top portion and a bottom, portion, the top portion having a first opening and the bottom portion having a second opening, the first opening and the second opening defining a passage through the top portion and the bottom portion, the passage extending along a first axis; the top portion being configured to interface with a tool; the bottom portion having an internal surface and an external surface, the internal surface having a disk receptacle; a drive shaft, having a top segment, a middle segment, and a lower segment; the top segment being configured to pass through the passage of the upper housing and to interact with the tool, the top segment having a first diameter and having a centerline aligned with the first axis; the middle segment having a second diameter that is greater than the first diameter, and having a centerline aligned to a second axis, the second axis being parallel to the first axis and positioned a first distance away from the first axis,; the lower segment having a third diameter that is less than the second diameter, and having a centerline aligned with the first axis; a disk assembly; characterized in that the disk assembly comprises: a plurality of disks, each having a body and a plurality of lobes positioned radially around the body, the lobes being configured to engage the disk receptacle in the upper housing, the body having an opening extending therethrough, the opening being configured to engage with the middle segment of the drive shaft; and, a lower housing configured to engage with the lower segment of the drive shaft, wherein said lower housing further comprises a disk receptacle configured to engage one of said plurality of disks. a plurality of disks, each having a body and a plurality of lobes positioned radially around the body, the lobes being configured to engage the disk receptacle in the upper housing, the body having an opening extending therethrough, the opening being configured to engage with the middle segment of the drive shaft; and, a lower housing configured to engage with the lower segment of the drive shaft, wherein said lower housing further comprises a disk receptacle configured to engage one of said plurality of disks.