
SUMIBORON Small Diameter Boring Bars SEXC Type SUMIBORON SEXC DMIN Min. diameter 10° DN Internal / Facing DCON WF CDX ■ Parts LF GAMF ■ Holders Dimensions (mm) Neck Cutting Rake Stock Min. Dia. Diameter diameter Length edge Depth of cut angle Applicable Clamp Cat. No. Wrench R L DMIN DCON DN LF WF CDX GAMF Sleeve Bolts E06D2-SEXC R/L03-04P D D 4.0 6.0 3.75 33.75 1.95 8 − 13 MIB1.6-2 E06D3-SEXC R/L03-04P D D 4.0 6.0 3.75 37.75 1.95 12 − 13 E06D2-SEXC R/L03-05P D D 5.0 6.0 4.75 35.25 2.45 10 − 12 HBSM6020 MIB1.6-2.5 0.2 SDBSM E06D3-SEXC R/L03-05P D D 5.0 6.0 4.75 40.25 2.45 15 − 12 E06D2-SEXC R/L03-06P D D 6.0 6.0 5.75 36.75 2.95 12 − 11 MIB1.6-3 E06D3-SEXC R/L03-06P D D 6.0 6.0 5.75 42.75 2.95 18 − 11 SEXC type requires separately sold sleeve HBSM6020. ■ Inserts ■ Sleeves ■ Alignment Jig* RE ø20 DCB ø3.31 7° 1.15 75° LF Dimensions (mm) Grades Dimensions (mm) Bore dia. Length Cat. No. Stock Set Screw Wrench Cat. No. Stock BN2000 BN7000 Cat. No. Nose DCB LF radius RE HBSM6020 D 6.0 80 BT0506 TH025 AFBSM60 D 2NU-ECXA 030X02LE D 0.2 2NU-ECXA 030X02LF D D 0.2 The part number suffixes stand for the following: Sleeve is sold separately. * This is a jig for centering the sleeve when installing the sleeve into the sleeve holder. LE: With honing LF: Sharp edge ■ Application Ranges ■ Recommended Cutting Conditions Main axis Low speed machining may cause Machining Indexable insert type rotation speed Over 2,000 min-1 accuracy chattering and cutting edge chipping SEXC Type n Extreme depths of cut may cause Brazed type Depth of cut 0.01–0.15 mm tool bending and degraded BSME Type ap accuracy of dimensions. Good 2.0 3.0 4.0 5.0 6.0 Feed rate 0.01–0.10 mm/rev − Machining diameter (mm) f L SUMIBORON ■ Application Examples Hardened steel alloy valve component BSME Bearing steel small automotive component SEXC BSME type demonstrates extended life of over two times the life of CBN tools SEXC type achieves 1.5 times extended life compared with brazed CBN tools from our competitors and achieves stable machining. from our competitors, and achieves greatly reduced tooling costs. Brazed type Indexable insert type 1,700 1,500 BSME SEXC Competitor ø5.0 Competitor s brazed ø4.0 CBN tools 600 CBN tools 1,000 0 500 1,000 1,500 2,000 0 500 1,000 1,500 Number of Parts (Pcs) Number of Parts (Pcs) Work material: Hardened steel alloy valve part (automotive related) Work material: Bearing steel small automotive part (60HRC) Tools: BSME R50020D2S6 Grade: BN2000 Holder: E06D2-SEXC R/L03-04P Insert: 2NU-ECXA 030X02LF(BN2000) Cutting conditions:vc=135m/min(7,500min-1) f=0.02mm/rev ap=0.10mm Dry Cutting conditions:vc=50m/min(4,000min-1) f=0.02mm/rev ap=0.02mm Wet Recommended tightening torque (N·m) L107