Page 920 - Ceratizit Catalog

Application - rotating tools
D45
Insert drills with helical chip flutes

Reduce the feed when the drill enters the transverse hole. With
transverse bores you should drill from both sides if possible. Reduce
feed rate between 30 and 60% (depending on the proportion of hole
to transverse hole).

Producing a transverse through hole

When stack drilling ensure that there is either no gap or the
maximum gap possible. Good work piece clamping is required.

Stack drilling

Depending on the surface quality, reduce the feed rate when drilling.

Drilling on an uneven surface

When the drill enters the convex work piece surface, the central
insert cuts first.

Drilling of a convex surface

When the drill enters or exits at an angle to the work piece surface,
reduce the feed rate by 30 to 60%.

Drilling on inclined surfaces

When spot drilling in a bead or central hole, reduce the feed rate by
up to 50 %.

Drilling / Technical information Spot drilling in a central hole