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Armature, Field Coil, Bearings & Carbons

Armature, Field Coil, Bearings & Carbons
  The armature is the rotating coil of the electric motor, which is wound on the motor spindle. The spindle is machined to take the collet and nut to hold the cutter. Some routers have a deeper hole in the armature, which allows longer cutters to be inserted.

Armature, Field Coil, Bearings & Carbons
  The field coil is the stationary electric coil that creates the opposing magnetic field to cause the armature to rotate.

Armature, Field Coil, Bearings & Carbons
  The spindle is mounted in a pair of bearing races to help it run smoothly. They are carefully aligned and firmly seated in the motor housing. Sealed bearings are packed with grease and (if the tool is not abused) should require no maintenance. Although they should have a life expectancy of at least 100 hours running time. It is worth checking them regularly for play and, if necessary, replacing them.
Armature, Field Coil, Bearings & Carbons
  Two carbon brushes are fitted which run against the commutator under light spring pressure. Excess sparking is usually an indication that the brushes have worn and need replacing. Please note carbon brush motors should only be run 20 minutes in every hour.
     
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