Version 1.0 dated 2019-01-08Page 56 Translation of the original instructions
B13 basic | B14 basic | B16 basicGB
B13-B14-B16_basic_GB.fm
OPTIMUM
MASCHINEN - GERMANY
®
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
Spindle bearing overheating
• Bearing worn down
• Bearing pretension is too high
• Working at high drilling speed
over a longer period of time.
•Replacing
• Increase bearing clearance for fixed
bearing (taper roller bearing)
• Reduce drill speed and feed rate
Rattle the spindle if the work-
piece surface is rough.
• Excessive slack in bearing.
• Spindle moves up and down
• Adjustment strip loose
• Clamping chuck is loose
• Tool is blunt.
• Workpiece is loose
• Readjust the bearing slack or
replace the bearing.
• Readjust bearing clearance (fixed
bearing)?
• Adjust strip to the correct slack
using the adjusting screw
• Check, re-tighten
• Sharpen or renew the tool.
• Clamp the workpiece firmly.
Malfunction
Cause/
possible effects
Solution
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