Optimum OPTI drill DH 26GT Operating Manual page 128

Malfunction
The drilling spindle cannot be
moved downwards.
Spindle bearing overheating
Working spindle rattling on
rough piece surfaces
EN
DH26GT | DH28GS | DH32GS
128
Cause/
possible effects
• Swivel integrated drill drift in
• Drill depth adjustment no released
• Bearing worn down
• Bearing pretension is too high
• Working at high drilling speed over
a longer period of time.
• Excessive slack in bearing
• Working spindle moves up and
down
• Clamping chuck is loose
• Tool is blunt
• Workpiece is loose
Translation of original instruction
Solution
• Swivel integrated drill drift out
• Release drill depth adjustment
• Replace
• Increase bearing clearance for fixed
bearing (taper roller bearing)
• Reduce drill speed and feed rate
• Reduce bearing clearance or
replace bearing
• Readjust bearing clearance (fixed
bearing)
• Check, re-tighten.
• Sharpen or replace tool
• Clamp the workpiece firmly.
Version 1.2.9 - 2021-09-28
Malfunctions