Boring Tools Series Selection Guide by Tooling Spherical Applications Through Boring Stop Boring Internal Facing Insert Shape 35° Diamond Type V Trigon Type W / Others Square Type S Trigon Type W / Others Triangular Type T / Others Structure/Shank Material Boring Bars S-SVJB E31 S-SWUB[BBPW] E48 S-SSKP[BBPS] E42 S-SWUB [BBPW] E48 S-STUP/S-STUB S-SVJC E Steel E32 S-SWUP E49 S-SSKC E44 S-SWUP E49 [BBPT] E50 Screw-on A-STUP Oil Hole E50 Steel with Anti-Vibration Mechanism B-SVJB B-STUP/D-STUP Oil Hole E31 [XBPT/XBPT-H] E51 Carbide C-SWUB C-SSKP C-SWUB C-STUP/C-STUB E-STUP Hole Oil [WBPW] E48 [WBPS] E42 [WBPW] E48 [WBPT] E52 [WBPT-H] E53 Steel Clamp-on/Double Clamp S-DSKN CKB S-DWLN S-DTFN E45 E58 E20 E55 Steel with Anti-Vibration Mechanism D-DWLN Oil Hole D-DTFN Oil Hole E20 E55 Carbide S-CSKP S-CTFP E43 E54 Steel Lever Lock S-PSKN E45 S-PWLN S-PTFN S-PSYN E46 E21 E56 Steel with Anti-Vibration Mechanism B-PTFN E56 Pin Lock Steel S-ESKN[BSKN]E46 S-ETFN S-ESYN[BSYN]E47 [BTFN] E57 Carbide Solid BXBR E63 Carbide CBN BSME Oil Hole BNBX BNB SEXC Oil Hole E64 E66 E68 E65 Symbols in [ ] indicate the previous product types Oil Hole : With oil hole E3