External Shallow Grooving Toolholders [for TGF Insert] Screw Clamp KTGF-F (without offset) (2.5) *Clamp screw can also be operated from this side. F1 B 2° 2°D L1 H3 L2 α Insert Grades 20˚ PR1115, PR1215 h H1 PR930, KW10 11˚ KPD001 6˚ TC40N H2 • Right-hand shown Right-hand Insert for Right-hand Toolholder, Left-hand Insert for Left-hand Toolholder. KTGF (with offset) (2.5) F1 B G 2° 2° L1 H3 D L2 α Insert Grades 20˚ PR1115, PR1215 h H1 PR930, KW10 11˚ KPD001 6˚ TC40N H2 Grooving • Right-hand shown Right-hand Insert for Right-hand Toolholder, Left-hand Insert for Left-hand Toolholder. Toolholder Dimensions Std. Dimension (mm) Spare Parts Clamp Screw Wrench External Description RL H1=h H2 H3 B L1 L2 F1 Internal Face KTGF& 1010JX-16F 10 2 10 10 1212JX-16F 12 - 2.5 12 120 18.5 12 SB-4070TRW FT-8 1616JX-16F 16 16 16 KTGF& 1212F-16F 12 - 2.5 12 85 18.5 12 SB-4070TRW FT-8 KTGF& 1010F-16 10 4 10 80 12 1212H-16 12 2 12 100 18.5 16 1616H-16 16 2.5 16 100 20 SB-4070TRS FT-10 2020K-16 20 - 20 125 20 25 2525M-16 25 25 150 32 KTGF-F / KTGF Selection Reference Q : What is the difference between "Without Offset" and "With Offset " of KTGF toolholders for external grooving? A :When operating the automatic lathe, the toolholder come very close to the chuck. In such cases, the "With Offset" toolholder sometimes interferes with the chuck due to the large gap between B and F1 dimensions as shown below. It is necessary to use "Without Offset" in such cases. Dimension F1 Dimension F1 No gap Dimension B Large gap Dimension B KTGF-F (without offset) KTGF (with offset) : Std. Item G14