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•
9
Tighten the wet diamond core drill bit (3)
using an open-end spanner SW24 (for ½" inter-
nal thread).
NOTE
Check the fit and condition of the wet diamond core
drill bit. A damaged wet diamond core drill bit may
not be used and must be replaced immediately.
5.2
Fixing the drive unit to the drill
stand
NOTE
Ensure that the drill stand is securely in position
and stable!
•
10
Insert the feather key (4) in the groove of the
bolt-on plate (2).
•
10
Use the 4 retaining screws (3) to screw the
drive unit (1) onto the bolt-on plate (2).
•
The spindle head must lock.
•
11
Unscrew the tapered shaft (5) and pull it out
of the spindle head (4) up to the limit stop.
•
11
Hook the bolt-on plate (2) with the drive
unit (1) from above into the holder of the spindle
head (3) and push the bolt-on plate (2) towards
the rear.
•
11
Push the tapered shaft (5) through the bolt-
on plate (2) and tighten using an open-ended
spanner.
NOTE
Never use the feed crank handle to tighten the
tapered shaft; it could be damaged by excessive
torque.
5.3
Connecting the water supply
DANGER
Risk of injury due to electric shock.
Î Protect the machine against splashing water.
When inserting and removing the water hose,
ensure that no water penetrates the air slits of
the machine. Use intact Gardena couplings and
Gardena hose lengths only. Check the sealing
rings for wear or damage. The drill may not be
run with leaking hose couplings.
•
12
Connect the water supply (1) with the
coupling (3) to a hose with a Gardena hose
connector (½ inch).
•
12
The water supply can be switched on and
off and finely controlled using the tap (1).
•
Set the water flow rate as low as possible to
avoid the risk of splashing/spraying.
5.4
Installing the drill stand with
plug fixing
13
Use the diamond core drill bit to align the drill
stand with the hole to be drilled:
•
13
Mark the anchor hole for fixing the drill
stand plate (5) through the mounting slot and
drill (drill hole: Ø 15 mm, depth 50 mm).
•
14
Insert the retaining screw (1) with attached
quick-action plug (2) in the plug hole.
•
13
Align the drill stand plate (5) with the help
of the spirit level (6) or a builder's level (for
BST 420) and the four adjustable feet (4).
•
13
Screw in the retaining screw (3) with the
help of the spike (2).
•
13
Tighten the quick-action nut (1) with light
hammer blows.
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