Electric drill: excessive sparks from the motor.
The brush may spark if the machine is vibrated.Poor foundations may be to blame for the vibration.It can be a result of faulty bearings.
What are the causes of sparking on the commutator?The causes of bar burning and sparking are usually Brushes not in the proper position.The spacing of brushes is not correct.The projecting-bar-edge is made of mica.A commutator is either rough or burned.There is a commutator.The brush contact was poor.There are brushes that are wrong size or grade.The brushes are sticking.
Direct-current brushed motor drills convert electrical energy into the motion that drives the spinning drill bit.This type of spark is a normal part of the drill's operation.
Do follow if there is sparking.The commutator should be cleaned with a contact cleaner.There is no wear on the commutator.Measure length to check carbon brush wear.Check the grade of the brush.Check the commutator shaft bearings.The motor should not be dirty from inside.