Maintenance - SPARKY HeavyDuty BU2 350 Instrucciones De Uso

To achieve extended durability and reliability of
the protective clutch, decrease the load after
clutch actuation. Upon this event the clutch will
return to its normal position (the specific noise
will disappear) and the operator can resume
work.
WARNING: Use only drill bits with
proper diameter, not exceeding the specified
on the name plate for the corresponding
speed, to avoid excessive actuating the
protective clutch.
MOUNTING AND DISMOUNTING THE
CHUCK
Mounting the chuck
Wind up chuck 1 onto the spindle completely
(Fig. 8a). Grip the spindle with S17 open-end
spanner on place 2. Insert the chuck key in one
of the three bores and fasten the chuck using
the key as a lever (Fig. 8b). Open the chuck 1
jaws completely, place the left threaded secur-
ing screw (Fig. 8c) and fasten it by S5 hex bit
(Fig. 8d).
Dismounting the chuck
Open the chuck jaws completely. Unscrew the
left threaded securing screw using S5 hex bit.
Grip the spindle with S17 open-end spanner on
place 2. Insert the chuck key in one of the three
bores and rotating clockwise (looking forward to
the chuck) using the key as lever, unwind chuck
1 from the spindle.
AUXILIARY HANDLE
Tighten the auxiliary handle onto the drill jour-
nal 3. The auxiliary handle bracelet shall lean
against the support surface of the machine jour-
nal (Fig. 9a), with the five journal teeth engaged
in the bracelet grooves of the auxiliary handle
(Fig. 9b). The bracelet shall be firmly fastened to
the machine journal (Fig. 9c).
The depth gauge 6 can be used for fixing the
depth of drilled bores (Fig. 10).
The auxiliary handle for these models is con-
nected to the body of the machine through vi-
bration dampers, protecting the operator and
reducing fatigue.
WARNING: In the interests of safety,
the auxiliary handle 7 should always be used!
8
EN
RECOMMENDATIONS fOR OPERA-
TION
DRILLING IN CONCRETE WITH DRILL
BITS
Apply moderate pressure during drilling in con-
crete (approximately 100-120 N. Higher pres-
sure will not increase drilling efficiency, but it will
lead to decreasing the operation life of the ma-
chine. Drill with speed lower than the maximum,
suited to the material.
Use carbide tipped straight shank drill bits.
Take the drill out of the opening from time to time
to remove dust.
WARNING: Watch out for the stage of
blunting of the bit and change it if considerable
decrease of efficiency is observed.
The optimum capacity when drilling in concrete
is up to 10 mm.
ACCESSORIES TO BE USED WITH
THIS POWER TOOL
▪ Drill bits for steel Ø3 mm to Ø16 mm
▪ Drill bits for wood Ø3 to Ø45 mm
▪ Drill bits for concrete Ø3 to Ø16 mm
VII - Maintenance
WARNING: Always ensure that
the tool is switched off and unplugged
before attempting to perform inspection or

maintenance.

BRUSH REPLACEMENT
This power tool is equipped with auto-stop
brushes. When the carbon brushes are worn
out, the machine switches itself off. In this case
both brushes must be replaced simultaneously
with genuine brushes at SPARKY service cen-
tre for warranty and post-warranty service.
GENERAL INSPECTION
Regularly inspect all fasteners and ensure they
are properly tightened. Should any of the screws
be loose, retighten it immediately to avoid haz-
ards (Fig. 11).
BU2 350 ● BUR2 350E