Is it necessary to use a tool with internal coolant?

Most people use tools without coolant as the price is lower, and it is possible to use external coolant with these tools. The carbide is solid to the center of the tool, making it a stronger tool with less risk of breakage.

In some cases, when you have problems with chips, you may want to use a tool with internal coolant as these tools get the coolant exactly where you want it and with higher pressure.

· Internal Axial Coolant (NBK) is most suitable for blind holes.
· Internal Radial Coolant (NBT) is most suitable for through holes.

Internal Radial Coolant is
most suitable for through holes