EN
5
After grinding the primary facets, the drill
holder is moved forward to a second stop
S
for grinding the secondary facets, which
gives the drill a 4-facet point.
The drill is ground to a 4-facet point.
The
Primary facets, P
and the
Secondary facets, S
meet in the
centre and form a point.
The high precision drill holder consists
of two identical parts. The drill will be
exactly centered and both of the cutting
edges will be sharpened exactly to the
same shape.
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The drill is mounted in a Drill Holder (3)
on a Guide (2), which in turn runs on a
Base (1). You move the drill across the
grindstone – the grinding automatically
takes place on the highest spot of the
stone.
The grinding depth for the first two
facets is determined by adjusting a
setting screw which has a stop,
P
.
These initial facets are called
primary facets.
After grinding one facet, the drill holder
is turned 180° and the other facet is
ground to an identical shape. Now both
of the two primary facets are ground.
This is How the Attachment Works
