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The drill blocks the workpiece. Workpiece and drill are tilted or
speed is too high.
Reline the workpiece or fix it. See
also “Position the workpiece”
Inadequate V-belt tension Set the V-belt tension. See also
“Setting of the speed and V-belt
tension”.
Excessive run and wobbling of the
drill
Bent drill. Use a straight drill.
Excessive wear on the spindle
bearings.
Replace the spindle bearing.
The drill is not centred in the chuck. Check the centering. See also
“Setting the drill”
Chuck is not firmly fixed. Correctly fix the chuck. See also
“Installing the drill chuck”