Stack drilling with LMT Belin One-shot Drills
in Sandwich PCD or diamond coated carbide
This type of tool is primarily dedicated to aerospace
customers. For riveting of CFRP structural
components, sometimes in combination with
metal parts as Aluminium or Titanium, piles of two
or more sheets (“stacks”) have to be drilled.
The task is to achieve a capable and efficient
machining process that should integrate as many
operations as possible. This means drilling,
reaming and chamfering in one single “shot”.
The challenge for those one-shot operations is
not only to respect the extremely tight tolerances
while drilling different materials but also to
avoid any typical damage symptoms such as
delamination or burrs.
Being the LMT Competence centre for reaming
and borehole finishing also in Composites &
Plastics and engineering partner for French aerospace
industry, LMT Belin has the knowledge to
design a special tool responding to your specific