Coromant U Indexable insert plunge drill

Plunge drilling is an effective method for roughing out cavities. It makes a deeper hole or cavity through repeated axial cuts. Coromant U drill can be used in broad machining conditions.

Benefits

• High tool body strength enables demanding plunge drilling operations
• Power efficient, productive solution with high metal removal rate

Features

• Center and periphery insert
• Geometries and grades for all materials
• Wiper geometry for best surface finish
• Engineered special options diameter range available
• Available with internal coolant supply
 

Plunge drilling in most materials

• Max drill depth is 6 x DC for plunge milling in through- and blind holes. Blind holes need to be monitored for chip accumulation and evacuation.

ISO application area

 

​Recommendations

• Due to the interrupted cut, a tough grade and a strong geometry is needed. Use grade GC1020 with geometry 53
• For best stability, always use the shortest possible drill
• Use internal coolant supply for better chip evacuation
• Maximum step-over rate: 70% of the drill diameter. This will provide the optimal cavity-making efficiency without leaving a material core in the cavity

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​Drill and hole tolerance

• Drill diameter DC, mm (inch)​: 12.7 – 35 (0.500 – 1.378)
• Tolerance mm (inch): ± 0.2 (± 0.008 inch)​
• Max hole depth: 6 x DC