860-GM

The CoroDrill® 860 with -GM geometry is a high-performance drilling solution for short holes, primarily in steel, stainless steel, cast iron and hardened materials.

• Standard diameter range 3–16 mm (0.118–0.629 inch)
• Drill depth 3–8 × drill diameter
• Single- and two-diameter tools as standard
• Body tolerance m7
• Achievable hole tolerance H8–H9
  

Featuring a new grade, innovative flute design and a multi-layer PVD-coated tip, CoroDrill® 860 with -GM geometry is a high-performance drilling solution for short holes primarily in ISO P, M, K and H materials.

It also performs competitively in ISO N and ISO S materials.

The new flute form with polished flutes improves chip evacuation and offers higher hole quality. It also offers high core strength and reduced cutting forces.

Excellent process security, high hole integrity and long tool life make it ideal for general engineering and for automotive applications.

• Corner reinforcement for increased corner strength and reduction in exit burring
• Optimized double margin for increased stability and improved hole quality
• New point thinning type for reduced cutting forces and excellent hole accuracy
• New point geometry results in refined clearance angles, improved surface quality and stable wear progression
• Edge preparation for increased cutting edge strength and removal of micro defects

• Optimized for drilling a wide range of materials and applications across all industry sectors
• Offers excellent stability, machining security and improved tool life
• Polished flutes ensure better chip evacuation and help reduce heat buildup in the tool
• Robust design and excellent dimensional accuracy significantly improve finished hole tolerance and quality
• With one drill for all materials, inventory can be reduced and machine flexibility improved, leading to reduced set-up times