Twin-Bars TWB (Micro Boring: Horizontal type) [Corner-R(rε) Tolerance: +0/−0.02mm, +0/−0.03mm] Min. Grades Bore Dia. Dimension (mm) PVD Coated Description Carbide 16 PR1025 10° 5° 10° φA φA F S rε F 5° TWBR 01003-005 1.0 0.85 0.2 ● 30° S 01503-005 1.5 1.30 +0 ● 2.38(Edge Height) rε -0.02 3 02003-005 2.0 1.75 0.25 0.05 ● 02503-005 2.5 2.10 0.3 ● 03003-005 3.0 2.40 0.4 ● TWBR 01503-010 1.5 1.30 0.2 +0 ● 02003-010 2.0 1.75 0.25 -0.03 ● 02503-010 2.5 2.10 0.3 0.1 ● • Right-hand shown 03003-010 3.0 2.40 0.4 ● F STW (Square Shank for Horizontal type insert) (For Left-hand toolholders for grooving, please ref. to page G72.) T T Boring F1 B F1 B L1 L3 L1 h H1 Fig.1 h H1 Fig.2 Solid • Right-hand shown Right-hand Insert for Right-hand Toolholder, (Left-hand Insert for Left-hand Toolholder.) Positive Toolholder Dimensions AD Bars Dimension (mm) Spare Parts Applicable Inserts Description Std. Drawing Clamp Screw Wrench Negative H1=h B L1 L2 L3 F1 F2 T F34 STWR 1212F-15 ● 12 12 85 12 1212K-15 ● 12 12 - 12 Fig.1 1616K-15 ● 16 16 125 - 16 - 3 SB-3080TR LTW-10S TWBR- 2020K-15 ● 20 20 25 25 Fig.2 2525M-15 ● 25 25 150 32 S..-STW (Round Shank for Horizontal type insert) (For Left-hand toolholders for grooving, please ref. to page G72.) L3 T T φD1 φD1 φD2 φD2 1 1 Offset length from the center L2 H Offset length from the center L2 H of toolholder to the tip of edge L1 of toolholder to the tip of edge L1 Fig.1 Fig.2 • Right-hand shown Right-hand Insert for Right-hand Toolholder, (Left-hand Insert for Left-hand Toolholder.) Toolholder Dimensions Dimension (mm) Drawing Spare Parts Applicable Inserts Description Std. Clamp Screw Wrench φD1 φD2 H L1 L2 L3 T F34 S12F- STWR15 ● 12 11 80 S14H- STWR15 ● 14 20 13 100 22 3 Fig.1 S15F- STWR15 ● 15.875 15 85 S16F- STWR15 ● 16 18 S19G- STWR15 ● 19.05 18.5 17 90 S19K- STWR15 ● 120 SB-3080TR LTW-10S TWBR- S20G- STWR15 ● 20 19.5 18 90 S20K- STWR15 ● 120 - 3 Fig.2 S22K- STWR15 ● 22 21.5 20 125 S25.0J- STWR15 ● 25 24.5 23 110 22 S25K- STWR15 ● 25.4 25 23 120 Twin-Bars are N : Std. Item F34 sold in 5 piece boxes