DGN/DGNC/DGNM-C :  Used for parting of bars, hard materials and tough applications. A positive rake, single cavity with a negative land and shoulders. Medium-to-high feeds. DGNC - with coolant holes, DGNM - single ended for very deep applications.  
 
 
Parting Ext. Grooving Face Grooving Face Grving Along Shaft Int. Face Grooving
  Designation
W
W±toler
R
Tmax-r		 l
Ref.		 fg
(min)		 fg
(max)
  Grade
  DGN 4003C  4.00  0.04  0.30  -No depth limit  18.8  0.10  0.30 IC328 IC830 IC1028 IC354 IC308 IC808 IC908 IC30N IC807 IC20
  DGN 4803C  4.80  0.04  0.30  -No depth limit  19.9  0.12  0.35 IC328
  DGN 5003C  5.00  0.04  0.30  -No depth limit  19.1  0.12  0.35 IC328 IC830 IC1028 IC354 IC808 IC908 IC30N IC20

The feed values for grade IC20 should be decreased by 50%.
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