Very Small Dia. Boring ApplicationsStop BoringBottom Facing Steel Carbide Anti- vibration Bars Boring Selection Guide for Boring Bars Guide for Selection by Application and Boring Shank Material Applicable Min. Bore Diameter (mm) Tool Type Depth of Cut (L/D) Insert and Tooling * When different from header bore diameters, the correct values are written in the table. Shape 1 1.5 2 3 4 5 6 7 8 10 12 13 14 16 18 20 22 25 28 34 44 54 70 CKB up to Coated Carbide and→ E583Dedicated SUMIDIAInsertsDDDDDD BXBR up to→ E635 Coated Carbide D2.0 to 5.00.5 increments DABB up to Brazed→ E692SUMIDIA DDD D E BSME Oil Hole up to Brazed→ E644SUMIBORON H2.5 to 5.00.5 increments SEXC Oil Hole up to SUMIBORON → E65 3 Dedicated Inserts H H H BNBX up to Brazed→ E665SUMIBORON D2.5 to 8.50.5 increments BNB up to → E684SUMIBORONDedicated Inserts DD D D D S-STUB/SBB-PST TUP up to→ E503 DDD DDDDDDD A-STUP Oil Hole up to → E50 3 H H H H H H B-STUP up to[XBPT] → E516 DD DDDDD D D40 D-STUP Oil Hole up to [XBPT-H] → E51 6 H H H C-STUP(B) up to[WBPT] → E528 Triangular Type DDD DDDDDD E-STUP Oil Hole 5˚ Positiveup to(With Hole) [WBPT-H] → E53 8 11˚ Positive(With Hole) H H H H H H S-CTFP Triangularup toType→ E54311° Pos.(Without Hole) D D D D32 S-PTFN up to→ E563 DDDD405063DDD B-PTFN up to→ E566 DDD324050 S-DTFN up to→ E553 DDD405063 D-DTFN Oil Hole up to → E55 6 H H H324050 S-ETFN up to[BTFN]→ E573 Triangular TypeNegative (With Hole) DDD BNZ up to → E675SUMIBORONDedicated Inserts D DDD D D9111721 S-SCLC up to→ E123 DDDDDDDDDDDDDDD 27 32 A-SCLC Oil Hole up to → E12 3 H H H H H H27 B-SCLC up to 80˚ Diamond Type → E13 6 7˚ Positive(With Hole) DD DD D D D32 Symbols in [ ] indicate the previous product types Oil Hole : With oil hole 1 1.5 2 3 4 5 6 7 8 10 12 13 14 16 18 20 22 25 28 34 44 54 70 : Steel Shank : Carbide Shank : Steel Shank with Anti-Vibration Mechanism Coloured box: Manufacturable size (no oil hole), ● : In stock, H : In stock with oil hole E5