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Approach
Start drilling
with discharge of
lubrocoolant
Drilling
Finish drilling
with removal of swarf and
switching off of
lubrocoolant
FIG. 19 – COOLANT DRILLING WITH BROACH CUTTER
8.3) Drill fi tted with special spiral bit
Follow the sequence described in § 8.1, taking care to position the drill on the rail by keep-
ing the spindle fully withdrawn.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 fi tted 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. 20a
PE 70 - PE 165 spiral bits
(drilling diameters from 7 to 16,5 mm)
DPE spacer
FIG. 20b
PE 170 - PE 275 spiral bits
(drilling diameters from 17 to 27,5 mm)
FIG. 20 – COOLING DRILLING WITH SPIRAL BIT
APE adapter
Spiral bit
19
7.4) Clamping to the rail web (Ref. to Fig. 16)
The drill has a rapid rail engagement/release mechanism and specially shaped positioning
templates for each rail type which facilitate precise and certain location of the part to be drilled.
To fully exploit the special features of the engagement device, we recommend calibrating
it to the rail type to be drilled as follows:
– Withdraw the spindle shaft (07) completely by means of the lever (36).
– Insert the threaded bush (39) of screw (11) into its seat (A) in the mobile arm (17) (see
detail in Fig. 16); use the hand-wheel (12) to completely open the mobile arm.
– Place the drill on the track at the point to be drilled and clamp it by tightening the
hand-wheel fully down (12): the positioning template will automatically position the
cutter or drill bit in line with the designated axis; if precise positioning is necessary to
the longitudinal track axis, use the reference pin (18).
– For rapid drill release, simply back-off the hand-wheel (12) by approximately two complete
turns, and while supporting the drill by its grip (09), pull the handwheel towards you. The
threaded bush (39) will disengage the seat (A) in the mobile arm (17) which will open
automatically, freeing the drill.
In this way, the operator can rapidly remove the machine from the track in case of danger,
or move on to drill another hole.
Thus, the next track engagement operation will be considerably simplifi ed:
after positioning the drill at the point to be drilled, simply push the hand-wheel forward
so that the threaded bush engages the seat (A) of the mobile arm. Now, a few turns on the
hand-wheel will be suffi cient to engage the drill correctly on the track.
36
07
FIG. 16 – POSITIONING THE DRILL
16
11
11
39
18
03
11
39
17
A
17
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