Internal To o l h o l d e r - Quick Guide TinyMini-Turn - Solid carbide tools for small diameters turning Boring, profiling & chamfering Min. bore diameter DMIN (mm) Application Description & Application Shank Size 0 2 4 6 8 10 Page JBT Boring, profiling & chamfering ø4 & ø7 ø0.6 ø7 4-5 JBP Boring & chamfering ø4 & ø7 ø2.8 ø5 4-6 JBU Back boring & chamfering ø7 ø5 4-6 JBC Boring & 45°chamfering ø7 ø5 ø6.8 4-6 JBB Back boring ø4 & ø7 ø3 ø7 4-7 Threading TinyMini-Turn Min. bore diameter DMIN (mm) Application Description & Application Shank Size 0 2 4 6 8 10 Page JBI Threading ø4 & ø7 ø4 ø7 4-7 (Metric thread) Internal Grooving TinyMini-Turn Shank Groove Min. bore diameter DMIN (mm) Application Description & Application Size width 0 2 4 6 8 10 12 14 15 Page JBG Internal Grooving ø4 & ø7 0.5 - 2 ø2 ø6.8 4-8 JBF Face grooving ø7 1-3 ø6 ø15 4-9 JBS Face grooving ø7 2 ø6 4-9 (for shaft) JBR Boring & profiling ø7 1 ø5 ø6.8 4-9 (full radius type) 4-2