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Critical Inspection Phase

National believes that the inspection phase is most critical in ensuring a quality rebuild. All machine components are inspected against the original print to verify form, fit, and function. National has invested in specialized inspection equipment.  Each drive train component undergoes:

  • A die-penetrant test for cracks
  • A multi-wave ultrasonic inspection to identify cracks or flaws
  • A hardness test to verify correct metallurgy/heat treat

Inspections results are documented and available for customer review.

Hardness Test
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