Prufi
PRU-141Declared input

Selected boring assembly overhang

Machining

Scope and limits

Full selected bore span from one entry plus declared holder clearance against selected assembly maximum overhang. Does not certify vibration or predict fixtures. Explicit operation-compatible precursor geometry_state required (pre_boring); omitted or finished_part is unassessed.

Standards and references

SANDVIK-BORING-TOOLING:web-2026-10-03

Sandvik Coromant internal turning tooling dimensions and overhang recommendations

Source scope
Selected internal turning bar/head/insert assembly; published DMIN and operation-specific maximum overhang. No universal bore diameter or length/diameter rule.
Implementation in Prufi
PRU-140 compares an explicitly declared actual pre-boring supported bore with the selected assembly DMIN. PRU-141 compares its complete axial span plus declared holder clearance with the selected assembly maximum overhang. geometry_state=pre_boring is required for assessment; missing or finished_part stages remain unassessed. No initial bore inferred from final CAD, insert/fixture access certification, vibration or process-quality prediction.

STEP examples for this check

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