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7
Malfunctions
Malfunction
Noise during work.
Drill "burns"
Drill tip is running off centre,
the drilled hole is non-round
Drill is defective
Drill is running non-round or
shaking
It is not possible to insert the
drill chuck or the taper man-
drel
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 1.1.8 dated 2018-9-13
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 sur-
face of the drill spindle
•
Motor is wrongly connected
•
Defective fuse
•
Motor overloaded
•
Too low mains voltage
•
Motor is wrongly connected
•
Irregularly heavy or tensed work-
piece
•
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 the original instructions
OPTIMUM
M A S C H I N E N - G E R M A N Y
Solution
•
Lubricate spindle (only possible
when disassembled)
•
Use new tool and check tension
(fixed setting of the bit, drill chuck
and taper mandril.
•
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 per-
sonnel
•
Reduce feed rate
Disconnect immediately and have it
checked by authorized personnel
•
Have it checked by authorised per-
sonnel
•
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
•
Increase bearing clearance for fixed
bearing (taper roller bearing)
•
Reduce drill speed and feed rate
B16H | B16HV
®
GB
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