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12
Operation
4. Firmly hold the air needle scaler and put the needle tips (1) up against
the workpiece you want to process.
5. Press the trigger (4) and slowly move the air needle scaler along the
workpiece. Do not push down the needles too hard against the work-
piece.
6. First disconnect the air needle scaler from the air supply after finished
working and when applying maintenance work.
Replacing the Needle Guide
1. The complete needle guide (2) must be replaced if it shows damage or
if the needles are severely worn.
2. Unscrew the old needle guide (2) using a little force.
Replacement Needle Guide: Art. 90 27 83,
Replacement Needles for Needle Guide: Art. 25 79 72
Air Pressure and Air Volume

Operate the air needle scaler with a pressure of approx. 6.3 bar (90 psi).
Exceeding the max. permitted pressure level of 8 bar will significantly
reduce the lifetime of the device. Operate the air needle scaler using a
compressor with an air suction capacity of >113 l/min. The ideal capacity
is provided by compressors with a suction capacity greater than 200
l/min.

Only use air hoses with an inner diameter of at least 9 mm. When setting
up the air pressure, always keep in mind that the pressure will decrease
by approx. 0.6 bar when using a 10 m long hose with an inner diameter
of 9 mm.
Maintenance and Care

To ensure proper functionality and a long lifetime, diligent lubrication and
maintenance are essential.

For operating pneumatic devices clean air is required. Corrosion resi-
dues, dust and dirt from the pneumatic pipes reduce the efficiency of the
device and will cause technical problems. An upstream maintenance unit
consisting of filter, pressure regulator valve and lubricating equipment