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Move the switch (pos.2) to the symbol to
activate the percussion or move the switch to
the symbol for drilling.
DEPTH LIMIT
For drilling with calibrated depth use the limit
stop reference rod (pos.8), to be inserted in the
side hand grip support (pos.9).
For safety reasons always use the tool with the
extra hand grip installed.
REPLACING DRILL BITS
See chapter “STARTING UP”.
DRILL BITS (not supplied)
Buy good quality bits, with a suitable connection
for the characteristics of the chuck and suitable
for the material to be drilled. Contact your retailer
who will be able to give you the best advice.
Our company produces a wide range of bits
suitable for the various uses (metal, wood,
brick, etc.).
DRILLING OPERATION
Always secure small items in a vice when dril-
ling. Use a punch to mark the initial drilling point.
Keep the drill bits sharp. To drill large holes first
drill a number of small holes to avoid the bit jam-
ming in the hole and thus overloading the tool.
Reduce the drilling pressure when the bit is
nearly out of the item.
Be cautious with the sawdust produced which
is very hot and also very sharp. Wear goggles
and protective gloves!
Drilling metal
Use HSS bits. If the item is a thin metal sheet,
place a block of wood under the metal sheet to
prevent the bit getting stuck.
To drill a cast iron item, use bits suitable for
this material.
With steel items, use special liquid coolant; with
aluminium use paraffin as a coolant, whereas
with brass and cast iron do not use liquids but
take the bit out of the hole frequently to allow it
to cool down.
Drilling wood and plastic
Always use bits that are suitable for drilling wood
and plastic. Keep in mind that they are fragile
materials and it is possible that the item can
crack during drilling.
Drilling bricks
Always use bits with hard metal inserts (such as
Widia etc.) that must always be in good condition.
Apply a constant drilling pressure throughout
the job. Frequently take the bit out of the hole to
remove dust.
If fitted, set the percussion function (pos.2) to
facilitate the action of the bit. For drilling tiles
deactivate the percussion function, to prevent
the tile cracking unexpectedly.
MAINTENANCE
!
!
IMPORTANT! Before any checks or
adjustment unplug the tool from the electric
power supply.
!
!
IMPORTANT! Do not tamper or attempt to
repair the electrical tool.
The working life and costs also depend on con-
stant and meticulous maintenance.
Take good care of your electrical tool and clean it
regularly. In this way its efficiency will be ensured
and its lifespan extended.
- Remove dust and machining residuals with a
brush with soft bristles.
- Do not wet or spray water over the electrical
tool - risk of internal infiltrations.
- Do not use any inflammables, detergents or
solvents.
- The plastic parts can easily be damaged by
chemical agents.
- Do not use compressed air for cleaning: Risk
of material ejection!
- Be careful when cleaning the switch, motor fan
slots and chuck.
The tool does not require any special internal
maintenance inasmuch as it is lubricated with
permanent grease inside. Any internal service
or replacement of the graphite brushes must
be carried out exclusively by an authorised
service centre.
CHUCK REPLACEMENT (fig.F)
1) Open the chuck jaws completely.
2) Insert a screwdriver in the front part of the
chuck until reaching the safety screw.
3) Loosen the safety screw by turning it
clockwise (left thread).
4) Now unlock the chuck with a sharp hit in
an anti-clockwise direction and unscrew it
manually.
To assemble the new chuck, follow the previous
operations in the reverse order.
Check that the fixing is correct and carry out an
operating test when idle.
Summary of Contents for T910
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