EC-B4-R :  4 flute, 45° helix extra-long solid carbide endmills with various corner radii. Used on hardened steel.  
 Hard Materials
 
Shouldering Slotting Ramp down Helical interpolation
  Designation
D

d

r

ap

H

D2

L

Flute

Ha°

Rd°

ShankC-Cylindrical
fz
(min)
fz
(max)

  Grade
  EC-B4 14-21C12R.5M160  14.00  12.00  0.50  21.00  25.20  11.50  160.00  4  45.0  5.0  C  0.04  0.12 IC903
  EC-B4 14-21C12R1M160  14.00  12.00  1.00  21.00  25.20  11.50  160.00  4  45.0  5.0  C  0.04  0.12 IC903

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