Weka SR 25 Manual De Instrucciones página 18

diamond core drill to come loose from the workpiece.
f) If attaching the drill stand at the workpiece by means of dowels or screws, make
sure that the used anchorage is able to hold the machine during operation securely.
If the workpiece is not resistant or porose the dowel can be removed whereby the drill
stand separates from the workpiece.
g) When fastening the drill stand on the workpiece by means of vacuum pump make
sure that the surface is smooth, clean and non-porous. Do not mount the drill to
laminated surfaces such as on tiles and coatings of composites. If the surface of the
workpiece is not smooth, flat or sufficiently secured, the vacuum plate can loosen from the
workpiece.
h) Make sure that the vacuum power is sufficiently safe before drilling. If there is
insufficient vacuum power the vacuum plate can loosen from the workpiece.
i) Never perform overhead drilling when the machine is attached only by vacuum
plate. In case of loss of the vacuum, the vacuum plate detaches from the workpiece.
j) Make sure that persons and working area on the opposite site are protected if you
drill through walls and ceilings. The drill bit can overlap the borehole and the drill core
can fall out of the drill bit on the other side.
k) For overhead drilling always use a water collecting system prescribed by the
manufacturer. Make sure that no water seeps into the tool. The penetration of water
into the power tool increases the risk of electric shock.
2. P A R T I C U L A R I N F O R M A T I O N - Please note!
This core drilling machine is only intended for industrial use and may only be operated by trained
personnel.
Proper use extends only to the drilling of rock, concrete and masonry.
For operation, the relevant regulations must be observed.
Power tools must regularly (approx. 6 months) be checked on safety by a specialist.
After any interruption to your work, only switch the core drilling machine on again after you have satisfied
yourself that the drill bit can rotate freely.
Wear hearing protection while using drilling machines.
3. T E C H N I C A L D E S C R I P T I O N
The SR25/38/65/68/75 is a diamond core drilling machine only to be used in a core drill rig (2).
It is suitable for drilling into rock, concrete, asphalt and masonry. Through the addition of water through
the diamond drill bit (3) via the ball valve (1a) the drilled material is flushed away and the tool is cooled
(wet drilling). The drilling tool, the diamond drill bit (3), is a tube drill which is fitted with soldered-on or
welded-on segments impregnated with diamond splinters.
If necessary, the flushing water is extracted through a water collecting ring (4) by means of a suction unit.
The machine may not be used for a different purpose or with a different tool.
SRXXS identifies diamond core drills with faster gear version.
The SR25/38/65/68/75 is water protected and therefore corresponds to the water protection class IP 55.
The motor is water-cooled, i.e. the cooling and rinsing water flows through the cooling coil of the motor
before being leaded to the drill bit.
On proper use water can not enter the machine. Thus it is possible to drill upwards vertically (overhead
drilling) without any further precautions.
In the SR25/38/65/68/75 an undervoltage trip is integrated, i.e. after a break of the mains voltage the
machine doesn't start accidentally on return of the voltage.
The SR25/38/65/68/75 is fitted with a novel SR-motor (SR = switched reluctance). The commutation
(alternating currenting of the stator poles) is managed by a power electronic which gets its orders from
a microcomputer. The speed is over the whole capacity range almost constant, therefore the start drilling
is made easier.
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