MANUFACTURING AND QC

Get the blank from steel factory and QC------Make the point &tang-----Annealing-----Filed back into shape---QC

Grinded by grinding machine----QC Why?

  • 1. Make the size as requested
  • 2. Polish the surface
  • 3. Cut the surface which is lack of carbon during annealing so that the whole file can have the same hardness

Cut the teeth --QC
Depth: 50% of the width
Width: as requested

Tempering--- industrial sand-blast cleaning--QC
QC standard: The hardness of all our files and rasps should be ≥ 60 HRC

Put the handle on--QC---packing