The DMS 180 can accept core bits up to 6" in diameter and has a travel length of 19 inches on the stand.  The depth at which you will need to drill will depend a lot on the core bit and extensions you are using.  The machine will be able to handle the 1-3/4 inch bit but you will need to research the bit that will allow a core travel for the depth you require for the material you are cutting through.