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[0] 120V Armature [1] 1 [2] 1 [4] Steel, rubber, copper [5] Steel for its durability, copper wire for its conductivity, and rubber for its unique properties. [6] Steel lathed down and machined to introduce the ridges on sides. Wires were extruded and balled into a sphere using a guided winding process [7] Cost effective and efficient for the complexity of the part and to get the desired properties. [3] 
Works in conjunction with the 120V field to convert the electric energy input into rotational energy that is utilized by the saw blade.
Gate 3 - Group 15 - 2012 - GICL Wiki