MINA - MINI CARBIDE BARS FOR SHAFT GROOVING L1 dh6 T max. a W L3 Dimensions (inches) Designation dh6 W a L3 L1 Tmax Dmin R/L Grade MINAR07-200200D060 .276 .079 .205 .827 1.417 .157 .236 R TT9030 MINR - MINI CARBIDE BARS, FULL RADIUS FOR INTERNAL BORING AND PROFILING L1 dh6 f L3 Tmax Min. BoreDia. a W Tmax R Dimensions (inches) Designation dh6 W±0.002 f a R L1 L3 Tmax Dmin R/L Grade MINRR07-190050D050 .276 .039 .035 .173 .020 1.378 .787 .039 .197 R TT9030 MINRR07-240050D060 .276 .039 .071 .209 .020 1.575 .984 .071 .236 R TT9030 MINRR07-290050D068 .276 .039 .110 .248 .020 1.772 1.181 .098 .268 R TT9030 219