Tap Treatments

Type Characteristics Purpose Use
Treatments

Oxidation
(homogenization)
  • Treated layer : 1 - 3 um
  • Oxidized coat layer (Fe304)
  • Porous with cutting oil held in pores
  • Lowered coefficient of friction
  • Prevents fusing
  • Unsuitable for non-ferrous metals for internal threads
Prevent fusing For internal thread material easily fused to tap materials
  • Stainless steel
  • Titanium alloy
  • Mild steel such as SS400 and S15C
Nitriding
  • Treated layer: 30 - 50 um
  • Surface hardness: 1000 - 1300HV
  • Improve wear resistance
  • Infiltration into basic materials
Wear resistance
For internal thread materials that wear easily

  • Cast iron
  • Silicon alloy
  • Heat-hardened resin
TiN coating
  • Treated layer: 1 - 3 um
  • Surface hardness: 2000 HV
  • Improved wear resistance
  • Lowered coefficient of friction
  • Prevents fusing
  • Improved heat resistance
Prevents fusing

Lubrication
For internal thread material easily fused to tap materials or that wear
  • Mild steel such as SS400 and S15C
  • Hard steel such as S45C
  • Alloy tool steels
  • Heat treated steels
V (TiCN) coating
  • Treated layer: 3 - 6 um
  • Surface hardness: 3000 HV
  • Improved wear resistance
  • Lowered coefficient of friction
  • Prevents fusing
  • Improved heat resistance
Prevents fusing

Lubrication
For internal thread material easily fused to tap materials or that wear
  • Mild steel such as SS400 and S15C
  • Hard steel such as S45C
  • Alloy tool steels
  • Heat treated steels
CrN coating
  • Treated layer: 3 - 5 um
  • Surface hardness: 1800 HV
  • Prevents fusing
  • Improved corrosion resistance
  • Improved lubrication
Prevents fusing

Lubrication
For internal thread material easily fused to tap materials
  • Copper
  • Copper alloy
Fx (TiAN) coating
  • Treated layer: 2- 4 um
  • Surface hardness: 2800 HV
  • Improved heat resistance
  • Improved wear resistance
Wear resistance For internal thread materials that wear easily
  • High speed cutting (helical cutting)

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