Malfunctions - Optimum Opti drill B 24H Operating Manual

7

Malfunctions

Malfunction
Earth leakage switch
on machines with frequency
converter triggers.
Motor is hot
Noise during work.
Bit „burnt"
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 mandrel
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
EN
B24H | B24HV | B28H | B28HV
132
Cause/
possible effects
• An unusual
FI protective switch is being used
• Wrong electrical connection of 400V
machines
• Spindle is too little lubricated
• Tool is blunt or wrongly clamped.
• Pulley on the motor has come loose.
• 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.
• Bit deformed
• Bearing worn down
• 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
• Fuse is defective
• Motor overloaded?
• Too low mains voltage
• Motor is wrongly connected
• Irregularly heavy or tensed work-
piece
• Inexact horizontal position of the
work-piece holder
• Spindle return spring does not work
• Locking bolt inserted
Translation of the original instructions
Solution

• Electrical connection on page
104
• Lubricate spindle (only possible
when disassembled)
• Use new tool and check tension
(fixed setting of the bit, drill chuck
and taper mandril).
• Check the fastening of the pulley,
tighten the fastening nut.
• 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 qualified
• Reduce feed
Disconnect immediately and have it
checked by authorized personnel
• Have it checked by qualified
• Balance the piece statically and
secure without straining
• Adjust workpiece-holder
• Check spindle return spring, replace
it, if necessary
• Pull out locking pin
Version 2.2.6 - 2022-04-07
Malfunctions