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Circular ramping with indexable insert drills

Circular ramping with indexable insert drills
 
What is circular ramping with indexable insert drills?

A rotating tool makes a hole by following a circular tool path while simultaneously feeding axially. The method can be used to machine existing holes. Circular ramping with indexable insert drills is where a tool, normally about half the diameter of the hole, is used at a ramping angle recommended for the tool.

Note: Circular ramping with longer indexable insert drills is not recommended.

Indexable insert drills

Circular ramping with indexable insert drills should only be considered for certain one-off operations, or when productivity is of less importance.

  • Cutting speed and feed rate can be the same as that recommended for conventional drilling
  • Max. hole depth is 2 x Dc
  • Max. pitch is the drill insert corner radius
 

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