ApplicationPilot hole is recommended for deeply recessed holes from 12xD and 16xD. From bore depths of 20xD a pilot hole is absolutely necessary. Creating a pilot hole always increases the process reliability.
Execution- Reinforced core with special point thinning
- Cutting chisel edge with high centring accuracy
- High alignment accuracy and roundness of the hole due to four drill heels
- Tip angle 140° for optimum creation of a pilot hole