CoroDrill 860

860-GM

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​
  

Optimized multi-material drilling solution

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 performs competitively in ISO N and ISO S materials as well.

The new flute form with polished flutes improves chip evacuation and yields greater hole quality. It also provides high core strength and reduces cutting forces.

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

Benefits

• 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 provide 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, stock holding can be reduced and greater machine flexibility is offered, leading to reduced set-up time

• CoroDrill® 860 with -GM geometry can be applied in many applications and components across multiple industries
• Perfect for ISO P, K, M and H materials in the general engineering and automotive industries
• Typical components are valve bodies, blocks, casings, flanges and manifolds
• Also suitable for applications where hole quality is critical within the aerospace and oil and gas industries
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Conventional drilling	Inclined entry	Inclined exit
Cross holes	Convex/concave surfaces	Chamfered holes