22
FIG. 19 – COOLANT OPERATION WITH BROACH CUTTER
FIG. 20b
PE 170 - PE 275 spiral bits
(drilling diameters from 17 to 22 mm)
Finish drilling
with removal of swarf and
switching off of
lubrocoolant
FIG. 20a
PE 70 - PE 165 spiral bits
(drilling diameters from 7 to 16.5 mm)
Approach
Start drilling
with discharge of
lubrocoolant
Drilling
10.3) Drill fitted with special spiral bit
Follow the sequence described in
§ 10.1
, taking care to position the drill on the rail by keeping
the
spindle fully withdrawn
. Bear in mind that the cooling 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. 20 – COOLANT OPERATION WITH SPIRAL BIT
*
use only for APE...,
not required for APED...
*