Prufi
PRU-009Heuristic screen

Hole too deep

Machining

Scope and limits

Flag holes where depth/diameter > 5:1 (chip packing & drill wandering risk).

Standards and references

No standards reference is assigned to this check. The scope described above applies.

STEP examples for this check

Geometry preview: Ø4 through hole: 8 mm deep

Machining · CC0-1.0

Ø4 through hole: 8 mm deep

Model example

Look through the central Ø4 mm bore in the 40 × 40 × 8 mm block. Axial depth/diameter = 2; the deep-hole heuristic warns above 5. Rotation must not change it.

Dimensions (approx.): 40 × 40 × 8 mm

Expected check result

PRU-009: no deep-hole warning expected.

No finding expected

PRU-009

Compare: Ø4 through hole: 40 mm deep
Geometry preview: Ø4 through hole: 40 mm deep

Machining · CC0-1.0

Ø4 through hole: 40 mm deep

Model example

Look through the central Ø4 mm bore in the 40 × 40 × 40 mm block. Axial depth/diameter = 10; the deep-hole heuristic warns above 5. Rotation must not change it.

Dimensions (approx.): 40 × 40 × 40 mm

Expected check result

PRU-009: expect a deep-hole warning.

Finding expected

PRU-009

Compare: Ø4 through hole: 8 mm deep
Geometry preview: Ø4 through hole: 40 mm deep (rotated)

Machining · CC0-1.0

Ø4 through hole: 40 mm deep (rotated)

Model example

Look through the central Ø4 mm bore in the 40 × 40 × 40 mm block. Axial depth/diameter = 10; the deep-hole heuristic warns above 5. Rotation must not change it.

Dimensions (approx.): 66.909 × 58.324 × 59.931 mm

Expected check result

PRU-009: expect a deep-hole warning.

Finding expected

PRU-009

Compare: Ø4 through hole: 8 mm deep
Geometry preview: Ø4 through hole: 20 mm deep

Machining · CC0-1.0

Ø4 through hole: 20 mm deep

Model example

Look through the central Ø4 mm bore in the 40 × 40 × 20 mm block. Axial depth/diameter = 5; the deep-hole heuristic warns above 5. Rotation must not change it.

Dimensions (approx.): 40 × 40 × 20 mm

Expected check result

PRU-009: no deep-hole warning expected.

No finding expected

PRU-009

Compare: Ø4 through hole: 40 mm deep
Geometry preview: Solid Ø4 shaft, not a bore

Machining · CC0-1.0

Solid Ø4 shaft, not a bore

Model example

This 40 mm long Ø4 cylinder has closed end faces and solid material inside. It is a shaft, not a 10:1 deep hole.

Dimensions (approx.): 4 × 3.97 × 40 mm

Expected check result

PRU-009 must not report a deep-hole warning on an exterior cylinder.

No finding expected

PRU-009

Compare: Ø4 through hole: 40 mm deep