Machine tool transmission system

A machine tool transition system, comprising:

• a driving assembly including an input unit and a driving gear connected to and driven by the input unit, the driving containing a plurality of driving teeth;
• a driven gear spaced from the driving assembly and contained a plurality of driven teeth;
• and
• at least one transmission ea which is located between the driving gear and the driven gear and engaged therewith, and includes an axial direction and a plurality of transmission teeth each including in the axial direction a front end tooth and a ear end tooth connecting to the front end tooth, the rear end tooth being formed at a thickness greater than that of the front end tooth, the transmission teeth being movable in the axial direction to engage with the driving teeth and the driven teeth via the front end tooth at a first engaged position and engage with the driving teeth and the driven teeth via the rear end tooth at a second engaged position;
• wherein two neighboring transmission teeth are spaced from each other at a tooth interval to form a tooth interval bottom surface and form an aperture on the tooth interval bottom surface to hold lubrication;
• wherein neighboring apertures are spaced from each other at a selected distance in the axial direction.