MINR R 07-D050/068 (RADIUS) : MINR: Mini carbide boring bars with full radius for internal boring and profiling in Dmin = 5.0 - 6.8 mm
  DesignationdW+0.05/0fabrl1l2Tmax-rDminR/LGICATGIREMgiicGrade
  MINRR07-190050D050 7.001.000.904.403.10.5035.020.01.005.00R6861026 1TT9030 
  MINRR07-240050D060 7.001.001.805.303.20.5040.025.01.806.00R6861066 1TT9030 
  MINRR07-290050D068 7.001.002.806.303.60.5045.030.02.506.80R6861067 1TT9030 

The corner radius is less than 0.1mm