WA1/WA5For milling applications ｜ Whisker ceramic for hardened materials

Rapid material removal and long tool life for hard milling

Mill hardened materials (HRC 45-62)
Reduce costs and eliminate grinding

Features

  • Mill hardened materials (HRC 45-62)
  • Reduce costs and eliminate grinding

Tooling application

Hardened materials from HRC 45-62
Tool steels, Mold steels, Chilled irons, Powdered metal, Stellite welded overlays, etc.

Grade characteristics

Cutting conditions

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Insert DOC(mm) HRC 45-55 HRC 55-60 HRC 60-62
Cutting speed(m/min) Feed(mm/t) Cutting speed(m/min) Feed(mm/t) Cutting speed(m/min) Feed(mm/t)
RPGN1204 Type 1.3 250 - 390 0.12 210-360 0.08 170-330 0.07
RNGN1207 Type 2.0 250 - 420 0.12 210-390 0.10 170-360 0.07

Note: Speeds and feeds are approximate starting points

Guidelines for Success

  • Minimize overhang and have a rigid set-up
  • Keep cutting engagement at 1/2 to 5/8 of the cutter diameter
  • Reduce feed by 25% upon entrance and exit of the cut
  • Use air blast, do not use coolant
  • Use helical interpolation to ramp down into a cavity
  • Increase feed rates in corners to compensate for heat loss
  • Use climb milling
  • Use shrink fit holders whenever possible
  • Safety first - machine within recommended conditions
  • As DOC gets smaller, speed should increase to compensate for heat loss
  • Adjust speed to maximize plastic deformation

Tool lineup

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Geometry NTK part number Corner R Grade Dimensions (mm)
Metric part description Edge preparation WA1 WA5 IC Thickness
RNGN 120700 T00520 ― ● 12.7 7.94
T00525 ●
T00820 ●
T01020 ●
RPGN 120400 T00520 ― ● 12.7 4.76
T01020 ●

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