Chip evacuation, cooling and lubrication between the tool and the workpiece material are primary functions of cutting fluid. This affects the hole quality and tool life. Most of Sandvik Coromant's boring tools are designed for internal cutting fluid supply.
- Use a mixture of 5-8% soluble oil.
- Higher pressure and volume improves chip evacuation.
- Mist cutting fluid or minimal lubrication can be used, especially in aluminum.
- Dry boring can be performed in short-chipping materials, preferably in horizontal or through hole applications. Tool life will be reduced. Compressed air will improve chip evacuation tremendously.
Note: Dry machining is never recommended in stainless steel (ISO M) and HRSA (ISO S) materials.
Use internal cutting fluid to get the fluid as close as possible to the cutting edge.
External cutting fluid supply is acceptable in short chipping materials but must continuously be directed to the cutting zone. If not possible, try dry boring.