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Job Description:

  • 1) Fabricates and undercuts commutators for electric motors and generators, using stacking and holding fixtures, handtools, metalworking machines, and measuring devices: Cuts copper bars of specified thickness into designated lengths and widths, and cuts sheet mica into separators, sleeves, and collars, using power saw.

  • 2) Stacks bars, separated by mica inserts, in stacking sleeve and aligns bars, using dial indicator and mallet.

  • 3) Places bar and mica assembly in fixture and presses assembly together, using hydraulic press.

  • 4) Heats assembly in oven to soften insulation and presses heated assembly to specified circumference, using press.

  • 5) Positions mica collars at ends of bar assembly, and if V-ring is used, presses ring against collar, using arbor press.

  • 6) Secures assembly with bolts and nuts or threaded ring, using wrenches or hammer and drift.

  • 7) Mounts assembly in indexing fixture on circular saw or slotting machine, and undercuts mica or slots commutator risers to specified depth.

  • 8) Removes burrs, chips, and foreign matter from commutator, using picks, knives, cloths, solvent, or compressed air.

  • 9) Connects leads to power source for testing commutator.

  • 10) Touches leads from bars onto steel frame to ensure that commutator is not grounded or shorted.

  • 11) May braze or solder resistor or capacitor leads to commutator.

  • 12) May be designated according to operation performed as Commutator Undercutter; Commutator V-Ring Assembler.




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End Of Job Description for: "COMMUTATOR ASSEMBLER"
DOT:   724.684-030

Job Number: 2168