Boring bar for small part machining
SJB series TUNGALOY

Increased rigidity for minimizing bar deflection and chatter
The rigidity of the bar in the direction of the principal force is maximized because the thickest portion of the head is located as close as possible to the cutting edge.

Chip pocket design for excellent chip evacuation
The excellent chip evacuation allows minimizing tool failure caused from chip recutting and chip entangling. Moreover, damages to the work surface by striking with chips are suppressed.

The oil hole is positioned as close as to the cutting edge so that the cutting fluid can be surely fed to the cutting point.