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8
Malfunctions
Malfunction
Noise during work.
Bit „burnt"
Drill tip is running off centre,
the drilled hole is non-round
Drill bit defective.
Drill bit runs unround or
wobbles.
It is not possible to insert
the drill chuck or the taper
mandrel
Motor does not start
Motor is overheating and
there is no power
Precision of the work
deficient
Drilling spindle sleeve does
not return to its initial
position
The drilling sleeve may not
be moved downwards.
Spindle bearing overheating
Malfunctions
Version 2.1.1 - 2020-07-27
Cause / possible effects
•
Spindle is too little lubricated
•
Tool is blunt or wrongly clamped
•
Drill speed too high /feed too high
•
Chips do not come out of the drill hole
•
Drill blunt
•
No or too little cooling
•
Hard points on the workpiece
•
Length of the cutting spirals/or angles on
the tool are unequal.
•
Drill deformed
•
No base / support used.
•
Drill deformed
•
Worn out spindle bearings
•
Drill is not correctly clamped.
•
Drill chuck defective
•
Dirt, grease or oil on the taper inside of the
drill chuck or on the taper surface of the drill
spindle
•
Motor is wrongly connected
•
Defective fuse
•
Motor overloaded
•
Too low mains voltage
•
Motor is wrongly connected
•
Irregularly heavy or tensed workpiece
•
Inexact horizontal position of the part holder
•
Spindle return spring does not work
•
Locking bolt inserted
•
Locking bolt inserted
•
Drill depth adjustment no released
•
Bearing worn down
•
Bearing pretension is too high
•
Working at high drilling speed over a longer
period of time.
Translation of original instruction
Solution
•
Grease spindle
•
Use new tool and check securing
(fixed setting of the bit, bit holder and
chuck).
•
Select another speed
Extract drill more often during work
Sharpen or
use new drill
•
Use cooling agent
•
Use new drill
•
Use support and clamp it with the
workpiece
•
Use new drill
•
Have the spindle bearings replaced
•
Correctly clamp drill
•
Replace the drill chuck
•
Clean surfaces well
•
Keep surfaces free of grease
•
Have it checked by authorised person-
nel
•
Reduce feed rate
Disconnect immediately and have it
checked by authorized personnel
•
Have it checked by authorised person-
nel
•
Balance the piece statically and
secure without straining
•
Adjust part-holder
•
Check spindle return spring, replace it,
if necessary
•
Pull out locking pin
•
Pull out locking pin
•
Release drill depth adjustment
•
Replace
•
Reduce bearing slack for fixed bear-
ing (conical-roller bearing)
•
Reduce drill speed and feed rate
B40 GSP
EN
71
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