OPTIMUM
M A S C H I N E N - G E R M A N Y
Malfunctions
Version 1.2.5 dated 2017-03-10
Page 109
Original operating instructions
DH26GTV | DH28GSV | DH32GSV
GB
The drilling spindle cannot be
moved downwards.
•
Integrated drill has been swiveled
inwards
•
Drill depth adjustment no released
•
Swivel integrated drill drift out
•
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.
•
Replace
•
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
•
Clamping chuck is loose
•
Tool is blunt.
•
Workpiece is loose
•
Reduce bearing clearance or
replace bearing
•
Readjust bearing clearance (fixed
bearing)?
•
Check, re-tighten
•
Sharpen or renew the tool.
•
Clamp the workpiece firmly.
Malfunction
Cause/
possible effects
Solution