Scheppach TBT19Vario Original Bedienungsanleitung Seite 66

Drill bit bums.
Drill leads off or hole
not round.
Drill bit binds in work
piece.
Excessive drill bit run-
out or wobble.
66 | GB
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Incorrect speed.
Chips not coming out
of hole.
Dull drill bit
Feeding too slowly
Hard grain in wood
or lengths of cutting
lips and/or angle not
equal
Bent drill bit.
Work piece pinching
drill bit or excessive
feed pressure.
Improper belt tension. Adjust belt tension.
Bent drill bit
Heavy wear of
spindle bearings
Drill bit not properly
installed in chuck.
Chuck not properly
installed.
Change speed. See
"Choosing speed and
belt tensioning".
Retract drill bit
frequently to remove
chips.
Resharpen drill bit.
Feed fast enough ta
allow drill bit to cut.
Resharpen drill bit
correctly.
Replace drill bit.
Support work piece
and clamp it. See
"Positioning table and
work piece".
See "Choosing speed
and belt tensioning".
Use a straight drill bit.
Replace bearings.
Install drill properly.
See "Installing drill
bits".
Install chuck properly.
See "Installing the
chuck".