Article no.: 123691
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Brand: GARANT
Tool material Solid carbide
Drill depth up to 20×D
Point angle 138
Shank DIN 6535 HA to h6
Through-coolant yes, with 40 bar
Machining strategy HPC
Pilot drill required yes, pilot drill

Information

  • Tool material Solid carbide
  • Drill depth up to 20×D
  • Point angle 138
  • Shank DIN 6535 HA to h6
  • Through-coolant yes, with 40 bar

Description

Version:

Helical fluted, with 4 guide chamfers and internal coolant holes. New generation of high performance co-pilot drills in the HPC range. With 138° point angle and special j6 cutting edge tolerance for optimum generation of a co-pilot hole. High roundness and alignment accuracy of the co-pilot hole.

Note:

Flute length LC = L2 + 1.5 × DC.
To achieve good process reliability with 40×D and 50×D deep-hole drills it is absolutely essential to drill 6×D pilot hole with a No. 122736 and a 20×D co-pilot hole with a No. 123691 co-pilot drill.
The generation of a pilot hole improves process reliability. See also pages 129/130.

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