Advice on bits to purchase for variety of materials

Good day.
I have bought a Avid cnc Pro4x8 which should arrive in the next 2 weeks. an OPT laser will be added as well at a later date.
I am looking for some advice on which bits to purchase from users that have experience in what I want to cut.

I would like to be able to cut and etch granite but I am not sure where to get these bits in the US.
I have put a links of what I am trying to accomplish.

If any one has experience with foam and plastic cutting as well pls advise on bit choices as well.


Not sure which bit to buy > Granite stone cutting
https://www.youtube.com/watch?v=nKNpG0JIkL4

Not sure which bit to buy > Granite stone etching
https://www.youtube.com/watch?v=y153kx9jVKY

Bit planned to buy > Granite stone drag bit - https://www.widgetworksunlimited.com..._engrv-250.htm

Not sure which bit to buy > Foam cutting bits?
https://www.youtube.com/watch?v=CiAbYo4AZpA
https://www.youtube.com/watch?v=0ca4V4Pr3rA

Bit planned to buy > Plastic sign cutting
https://openbuildspartstore.com/3d-s...nc-bit-kit-v1/
https://openbuildspartstore.com/meta...nc-bit-kit-v2/

bought already > Woodbits - https://www.avidcnc.com/cnc-router-bit-set-p-427.html

bought already> Aluminium - https://www.avidcnc.com/cnc-aluminum...set-p-464.html

Thank you in advance.

Hi,
you'll need diamond tools for granite and diamond tool MUST BE COOLED, and usually with lots of coolant, otherwise the diamond embeded in the tool
will overheat and break away from the tool. They wear out way WAY too fast without coolant.

Is your machine set-up for flood cooling?

Craig

Good day.
the plan:I have a water table 4x4 that I want to fasten on top the cnc table adding a pump setup and the granite piece will be fasten inside the pan.
for the granite works I do not think these will be bigger than 1.5x1.5 ft. so there is plenty of space around.


Thank you!