External Shallow Grooving Toolholders [for GB / GBA Insert] Top Clamp  KGB (Will be switched to KGBA G9) T 2° F1 B L2 2° L1 A D H3 h H1  Right-hand shown Right-hand Insert for Right-hand Toolholder, Left-hand Insert for Left-hand Toolholder.  KGBS (Will be switched to KGBAS G9) 2° F1 B h D L2 T L1 G H3 A H1 2°  Right-hand shown Left-hand Insert for Right-hand Toolholder, Right-hand Insert for Left-hand Toolholder. Grooving  Toolholder Dimensions Std. Dimension (mm) Spare Parts Applicable Clamp Clamp Bolt Spring Wrench Description Inserts RL H1=h H3 B L1 L2 F1 A T G6~G8 G10 KGB& 2020K-16  20 11 20 125 24 25 - 2.5 GB32& type 2525M-16  25 25 150 30 GBA32& type 2020K22-15  20 11.5 20 125 25.5 25 1.0 4.0 2525M22-15  25 25 150 30 CGB& BH6X25 SP-6 LW-4 2020K22-25  20 11.5 20 125 25.5 25 2.0 4.5 GB43& type 2525M22-25  25 25 150 30 GBA43& type 2020K22-35  20 11.5 20 125 25.5 25 3.0 5.5 2525M22-35  25 25 150 30 KGBS& 2020K-16  20 11 20 125 25 25 - 2.5 GB32 type 2525M-16  25 25 150 30 GBA32 type 2020K22-15  20 11.5 20 125 25 27 1.0 4.0 2525M22-15  25 25 150 32 CGB BH6X25 SP-6 LW-4 2020K22-25  20 11.5 20 125 25 27 2.0 4.5 GB43 type 2525M22-25  25 25 150 32 GBA43 type 2020K22-35  20 11.5 20 125 25 27 3.0 5.5 2525M22-35  25 25 150 32 · Dimension T shows the distance from the toolholder to the cutting edge. Available Groove Depth: "B" Dimension of Insert. ·Clamp : KGB& ... CGBR for Right-hand Toolholder, and CGBL for Left-hand Toolholder. KGBS& ... CGBL for Right-hand Toolholder, and CGBR for Left-hand Toolholder.  Rake Angle(α) after Installment of GB type Clamp GB32& GB43& GB43&R (Full-R) α Insert Grades α Insert Grades α Insert Grades 5° TC60M 5° TC40N TC60M 5° TC60M 050R~150R PR630 PR630 PR930 PR630 10° KPD010 TC60M 200R 20° KW10 20° KW10 14° PR630 KW10…050R~200R KGB Toolholder KGBA Toolholder * KGB / KGBS toolholder will be switched to KGBA / KGBAS. Better Chip flow. * For applicable insert, GB insert will be switched to GBA. There are various types of GBA insert grades available dependent on the user's cutting condition requirements.  : Check Availability G11