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Rotors

Rotors are key components in a variety of power tools, ensuring that they work by generating the rotational motion necessary to perform work such as drilling, cutting or grinding. Our product range includes rotors for: grinders, drills, hammer drills, demolition hammers and other equipment. Reputable brands such as BOSCH, MAKITA, HITACHI, HIKOKI, METABO, DeWALT, HILTI, as well as market, Chinese brands.

How to choose the right rotor?

Each rotor has an original part number for easy selection for branded power tools. For market, Chinese tools, each rotor has dimensions that should be compared with the old part.

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What is a rotor?

The rotor for power tools, is a key component inside many electrical devices such as:

  • drills
  • angle grinders
  • demolition hammers
  • hammer
  • drills
  • screwdrivers

It is the rotating component of an alternating current (AC) or direct current (DC) electric motor. It is responsible for converting electrical energy into mechanical energy.

How is the rotor constructed?

  • Magnetic core: It consists of a set of laminated steel sheets that form a cylinder.
  • The lamination reduces energy losses due to eddy currents.
  • Winding
  • :
  • A copper winding is wound on the core.
  • The current flowing through this winding creates a magnetic field.
  • Commutator (in DC motors): Located at one end of the rotor and consists of segments that conduct current to the rotor winding. It works with brushes that supply current to the commutator.

How does the rotor function?

  • Magnetic induction: The electric current flowing through the rotor winding creates a magnetic field that interacts with the magnetic field of the stator (the stationary part of the motor).
  • Rotational motion: The interaction of the magnetic fields of the rotor and stator causes the rotor to start rotating, converting electrical energy into mechanical energy
  • .

Types of motors:

  • Direct current (DC) motors:
  • The rotors in these motors have commutators and brushes.
  • Alternating current (AC) motors: Can be of various types, such as induction or synchronous, and in most cases do not have commutators or brushes.

Maintenance and repair:

  • Rotors can wear out due to heavy use, overheating or mechanical damage.
  • Typical symptoms of rotor damage include sparking, abnormal sounds or a drop in tool power.
  • Repairs may include winding replacement, commutator or bearing replacement. Or even the stator. To extend the life of the rotor, it is recommended to buy good quality carbon brushes.