9
WARNINGS SPECIFICALLY RELATED TO GRINDING AND ABRASIVE CUTTING
OPERATIONS
Use only the type of cutting/grinding wheels recommended for your tool and the
protection specifically designed for the selected cutting/grinding wheel.
Cutting/grinding wheels not designed to be used with the tool cannot be adequately
protected and are unsafe.
The protection must be solidly fixed to the tool and placed in the safest position
possible so as to minimise the potential risk of contact between the operator and
cutting/grinding wheel.
The protection is designed to protect operators from the ejection of
fragments in case of breakage and from accidental contacts with the grinding wheel.
Cutting/grinding wheels must be used for the recommended applications only. For
example do not use the cutting side of the wheel for grinding operations.
Abrasive
cutting wheels may break because they are designed to be used for peripheral grinding
operations and for the application of lateral forces.
Always use the cutting/grinding wheels with undamaged flanges and verify that their
shape and dimensions are appropriate for the selected cutting/grinding wheel. The
purpose of flanges is to support the cutting/grinding wheel and reduce the potential
risk of breakage.
Flanges for cutting wheels may be different from those of grinding wheels. Do not use
grinding/cutting wheels that have been fitted on larger tools.
These cutting/grinding
wheels are unsuitable because of their higher speed as compared to that of smaller tools
and could therefore cause explosions.
Do not “stall” the cutting wheel or apply an excessive pressure. Do not attempt to
increase the cutting depth.
The application of a high pressure on the cutting wheel
increases the load and the risk of torsion and bending during cutting, with the consequent
risk of rebound forces or breakage.
Do not stand in line with the cutting/grinding wheel or behind it while it is rotating.
When the cutting/grinding wheel moves away from the operator’s body during operation,
the rebound force may push the revolving cutting/grinding wheel and the tool towards the
operator.
If the cutting/grinding wheel bends or the cutting operations stops for any reason,
disconnect the tool from the power supply and keep it still until the cutting/grinding
wheel has come to a full stop.
Do not attempt to remove the cutting wheel while it is
moving because this could produce a rebound force. Identify the cause of the problem and
perform the necessary corrective actions to prevent the problem from reoccurring.
Do not resume the cutting operation. Resume the cutting operation only when the
cutting wheel has reached its maximum speed.
The cutting wheel may stall, lift or
produce a rebound force if the tool is restarted when the work piece is present.
Always use appropriate supports for panels or large work pieces in order to minimise
the risk of interlocking and rebound forces.
Large work pieces tend to bend because of
their weight. Supports must therefore be placed under the work piece, close to the cutting
line and to the edge of the work piece on both sides.
Pay particular attention when cutting “pockets” on existing walls or other areas with
limited visibility.
The projecting cutting wheel may cut gas or water pipes, electrical cables
or other objects and thus produce a rebound force.
PARTS OF THE TOOL
1 - Identification plate
2 - ON/OFF switch
3 - Speed control
4 - Spindle with seating for collet
5 - Collet
6 - Collet lock-nut
7 - Wrench
8 - Motor ventilation slots
STARTING UP
Before starting-up the tool, ensure that:
- the packaging is complete and does not show signs of having been damaged during sto-
rage or transport;
- the tool is complete; check that the number and type of components comply with that re-
ported in this instruction booklet;
- the power supply and socket outlet can support the load reported in the table and that in-
dicated on the tool identification plate reproduced and explained on page 11.
FITTING ABRASIVE WHEELS OR CUTTERS
AR11N - AR52EN:
1. Insert the spindle of the wheel or cutter in the collet seating (5);
2. keep the collet spindle (4) still using the wrench supplied and tighten lock-nut (6);
3. check that the tool does not rotate off-centre.
When the need arises to use tools having a spindle diameter of Ø 3 mm, fit the reduction col-
let supplied as accessory.
To fit the reduction collet:
4. unscrew nut (6);
5. insert the reduction collet;
6. re-tighten the nut then follow the normal tool fitting procedure.
AR38N - AR38EN:
1. Fit pliers (Part. No. 921.131 or 922.131) into the out (Part No. 513.131) and make sure
that they are housed in their seal;
2. fit the milling cutter into the pliers, paying attention to the stem diameter which shall be
equal to the pliers hole;
3.
it is recommended to insert the mill into the collect extracting it together with the
nut from the collect shaft;
4. tighten the nut, the pliers and milling cutter on the pliers-holding shall (Part No. 512.131).
When the need arises to use tools having a spindle diameter of Ø 3 mm or Ø 6,35 mm, re-
place the collet supplied with the spare collet having the necessary seat diameter.
To make the replacement:
5. unscrew the nut (6);
6. substituite the collet;
7. re-tighten the nut then follow the normal tool fitting procedure (see point 3).
BEFORE STARTING THE TOOL
Ensure that:
- the power supply conforms with the characteristics of the tool;
- the power supply cable and plug are in perfect condition;
- the ON/OFF switch works properly though with the power supply disconnected;
- all the parts of the tool have been assembled in the proper manner and that there are no
signs of damage;
- the ventilation slots are not obstructed.
Summary of Contents for AR11N
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