Sandvik Coromant Machining carbon fibre materials - Manual (Page 30)

Peck cycle metalic structure
Begin Cycle
Begin cycle at fast approach
level (FAL). Typically 2.5mm
above material.
Drill CFRP until the drill point is
0.5mm (0.020”) above metallic
material.
Beging peck cycle, 1mm (0.040”)
for titanium or 3mm (0.115”) for
aluminium.
Drill retracts fully to
FAL between pecks.
Reduction of feed rate on exit
reduces risk for delamination
and splintering.
SANDVIK COROMANT USER’S GUIDE - COMPOSITE SOLUTIONS 30