Table lifting mechanism for upright drilling machines 1

Описание: Turn pink shaft for raising or lowering the table.
The gravity can not move the table down because of the pink worm self-locking.
The table is turnable around the machine post.
Use green screw to fix the table after adjusting.
Blue gear is a helical one that engages with violet rack of oblique teeth.
Inventor files of this video:
http://www.mediafire.com/download/qei...
STEP files:
http://www.mediafire.com/file/19hiz57...