GITM :  CBN inserts for turning and grooving on hard ferrous materials. Used for finishing hard ferrous materials with 45-65 HRc, dry cutting recommended for interrupted cut.  
 HARD MATERIALS
 
Ext. Grooving Ext. Grooving & Turning Int. Grooving Int. Groov & Turn
  Designation
W±0.02
R±0.05
M		 ap
(min)		 ap
(max)		 ft
(min)		 ft
(max)		 fg
(min)		 fg
(max)
  Grade
  GITM 3.00K-0.20  3.00  0.20  2.4  0.00  0.30  0.02  0.07  0.02  0.05 IB20H IB50 IB10H
  GITM 4.00K-0.20  4.00  0.20  3.2  0.00  0.40  0.03  0.09  0.02  0.07 IB20H IB50 IB10H
  GITM 5.00K-0.40  5.00  0.40  4.0  0.00  0.50  0.05  0.13  0.03  0.10 IB20H IB50 IB10H
  GITM 6.00K-0.40  6.00  0.40  4.8  0.00  0.60  0.05  0.15  0.04  0.12 IB20H IB50 IB10H
  GITM 8.00K-0.40  8.00  0.40  6.0  0.00  0.80  0.07  0.20  0.05  0.16 IB50

Dmin for internal machining = 70 mm
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