Chip evacuation and cooling and lubricating between the tool and the workpiece material are primary functions of cutting fluid, and all affect the cutting quality and the tool life.
- Use high pressure (minimum 10 bar up to 70 bar) coolant containing 5-8 % soluble oil.
- The cubic capacity of the coolant tank should be 5-10 times greater than the volume of coolant that the pump supplies per minute.
- A copious supply of cutting fluid, directed exactly at the cutting edge, should be used from the moment the insert is engaged and throughout the operation.
- Use wet cutting if possible.