ECH-B-6 :  6 flute, 45° helix, medium length, solid carbide endmills. Used for finishing of hard materials up to 65 HRc. Use IC903 for hard steel and high temperature alloys and IC900 for all other applications.  
 Hard Materials
 
Shouldering Slotting Helical interpolation
  Designation
D
d
ap
L
Flute
Ha°
ShankC-Cylindrical, W-Weldon		 fz
(min)		 fz
(max)
  Grade
  ECH060B16-6C06  6.00  6.00  16.00  57.00  6  45.0  C  0.03  0.07 IC900 IC903
  ECH060B16-6W06  6.00  6.00  16.00  57.00  6  45.0  W  0.03  0.07 IC900
  ECH080B20-6C08  8.00  8.00  20.00  63.00  6  45.0  C  0.03  0.09 IC900 IC903
  ECH080B20-6W08  8.00  8.00  20.00  63.00  6  45.0  W  0.03  0.09 IC900
  ECH100B22-6C10  10.00  10.00  22.00  72.00  6  45.0  C  0.03  0.10 IC900 IC903
  ECH100B22-6W10  10.00  10.00  22.00  72.00  6  45.0  W  0.03  0.10 IC900
  ECH120B25-6C12  12.00  12.00  25.00  83.00  6  45.0  C  0.04  0.11 IC900 IC903
  ECH120B25-6W12  12.00  12.00  25.00  83.00  6  45.0  W  0.04  0.11 IC900
  ECH160B32-6C16  16.00  16.00  32.00  92.00  6  45.0  C  0.05  0.13 IC900 IC903
  ECH160B32-6W16  16.00  16.00  32.00  92.00  6  45.0  W  0.05  0.13 IC900
  ECH200B38-6C20  20.00  20.00  38.00  104.00  6  45.0  C  0.05  0.13 IC900 IC903
  ECH200B38-6W20  20.00  20.00  38.00  104.00  6  45.0  W  0.05  0.13 IC900

Use IC903 for machining hardened steel up to 65 HRc
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