Version 1.0.1 - 2020-07-23 39Translation of original instruction
B20 | B25 | B32 EN
B20-B25-B32_GB.fm
6 Malfunctions
Malfunction
Cause/
possible effects
Solution
Noise during work.
• Spindle is too little lubricated
• Tool is blunt or wrongly
clamped
• Grease spindle
• Use new tool and check tension
(fixed setting of the bit, drill chuck
and taper mandril)
Bit „burnt“
• Drill speed too high /feed too
high
• Chips do not come out of the
drill hole.
• Drill blunt
• No or too little cooling
• Select another speed
• Extract drill more often during work
• Sharpen or
use new drill
• Use coolant.
Drill tip is running off centre,
the drilled hole is non-round
• Hard points on the workpiece
• Length of the cutting spirals/or
angles on the tool are unequal
• Drill deformed
• Use new drill
Drill is defective
• No base / support used. • Use support and clamp it with the
workpiece
Drill is running non-round or
shaking
• Bit deformed
• Bearing worn down
• Drill is not correctly clamped.
• Drill chuck defective
• Use new drill
• Have the spindle bearings replaced
• Correctly clamp drill
• Replace the drill chuck
The drill chuck or the taper
mandrel cannot be inserted.
• Dirt, grease or oil on the taper
inside of the drill chuck or on
the taper surface of the drill
spindle
• Clean surfaces well
• Keep surfaces free of grease
Motor does not start.
• Motor is wrongly connected
• Fuse is defective
• Have it checked by qualified
Motor is overheating and there
is no power
• Motor overloaded?
• Too low mains voltage
• Motor is wrongly connected
• Reduce feed
Disconnect immediately and have it
checked by authorized personnel
• Have it checked by qualified
Precision of the work deficient
• Irregularly heavy or tensed
workpiece
• Inexact horizontal position of
the work-piece holder
• Balance the piece statically and
secure without straining
• Adjust workpiece-holder
Drilling spindle sleeve does not
return to its initial position
• Spindle return spring does not
work
• Locking bolt inserted
• Check spindle return spring, replace
it, if necessary
• Pull out locking pin
The drilling sleeve may not be
moved downwards.
• Locking bolt inserted
• Drill depth adjustment no
released
• Pull out locking pin
• Release drill depth adjustment
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