Optimum Opti drill B 24H Operating Manual page 90

OPTIMUM
M A S C H I N E N - G E R M A N Y
Malfunction
Spindle bearing overheating
Working spindle rattling on
rough piece surfaces
GB B24H | B24HV | B28H | B28HV
Page 90
Cause/
possible effects
• 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
• Adjustment strip loose
• Clamping chuck is loose
• Tool is blunt
• Workpiece is loose
Original operating instructions
Solution
• 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)
• Adjust strip to the correct slack using
the adjusting screw
• Check, re-tighten.
• Sharpen or replace tool
• Clamp the workpiece firmly.
Version 2.2.2 dated 2014-03-07
Malfunctions