Hole cutters break quickly, holes are
bigger than the hole cutter
Motor running roughly and/or
seizing up
Motor making a rattling sound
Motor humming, big sparks and
motor has no force
Motor does not start or fails.
Guiding takes a great deal of effort
Insufficient magnetic force
Frame under voltage
Fuse blows when magnet switch is
turned on
Fuse blows when motor is started up - Damaged or defective wiring
Rotation system free stroke too long
- Play in the guide
- Bent spindle
- Shaft extending from the motor is bent
- Pilot bent
- Bent spindle
- Shaft extending from the motor is bent
- Triangular guide not mounted straight
- Dirt between spindle and triangular guide
- Gear ring (bottom of the armature) worn out
- Gear(s) worn out
- No grease in gear box
- Armature damaged
- Field burned
- Carbon brushes worn out
- Damaged or defective wiring
- Damage to armature or field coil
- Damaged or defective brushes
- Guide is set too tight
- Guide is dry
- Guide/gear- rack/rotation system is dirty or damaged
- Bottom of magnet not clean and dry
- Bottom of magnet not flat
- Work piece is not bare metal
- Work piece is not flat
- Work piece is too thin less than 3.5mm
- Defective control unit
- Defective magnet
- Damaged / defective wiring
- Motor seriously dirty
- Damaged or defective wiring
- Wrong value fuse
- Defective magnet switch
- Defective control unit
- Wrong value fuse
- Motor running roughly
- Defective armature and / or field
- Carbon brushes worn out
- Defective control unit
- Loose or defective gear-rack
- Defective rotation system
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