21
Start drilling
with discharge of
lubrocoolant
Drilling
Finish drilling
with removal of swarf and
switching off of
lubrocoolant
Approach
FIG. 19 – COOLANT DRILLING WITH BROACH CUTTER
8.3) Drill fitted with special spiral bit
Follow the sequence described in § 8.1, taking care to position the drill on the rail by keeping the
spindle fully withdrawn
. Bear in mind that the coolant circuit, instead of being automatically
opened and closed by the guide bit, is kept open at all times by the
DPE
spacer fitted on the
spigot of the spiral bit; it must therefore be activated, by opening the tap (02), before starting
to drill, then switched off after drilling by closing the tap.
FIG. 20b
PE 170 - PE 275 spiral bits
(drilling diameters from 17 to 27.5 mm)
FIG. 20 – COOLANT DRILLING WITH SPIRAL BIT
FIG. 20a
PE 70 - PE 165 spiral bits
(drilling diameters from 7 to 16.5 mm)
DPE spacer
APE adapter
Spiral bit
*
use only for APE...,
not required for APED...
*
The slug is ejected upon completion
of the drilling operation
