SBDG / CONCEPTUAL OVERVIEWIllustrative shell; finished face and end details unconfirmed
Loading model
A closer look at the surface
Venting
Pattern
From the roll
to the report.
Suction. Blind drilling. Grooving.
One connected pattern.
01 / The 1.406-inch window↓
01 / Find the Pattern
One window.
A complete pattern.
Across the roll, a repeating arrangement defines the relationship between every hole.
- Pattern
- 102–19–5
- Axial window
- 1.406 in
Nominal example geometry.
Not an analyzed field photograph.
02 /
Suction Drilling
The larger holes pass through the illustrated cover. Their repeating centers establish the base pattern.
- Hole diameter
- .152 in
- Holes per window
- 19
Suction surfaces highlighted
03 /
Blind Drilling
Two shifted families sit between the suction holes. The blind cavities stop within the cover.
- Hole diameter
- .087 in
- Nominal depth
- .320 in
Blind surfaces highlighted
Flat drill ends are an illustration convention.
04 /
Grooving
- Grooves per inch
- 8
- Width / depth
- .030 / .125 in
- Land width
- .095 in
- A
- B
- C
- 1
- 2
- 3
A / B / C and 1 / 2 / 3: edge-to-edge clearances.
Four-start illustration: .500 in/revolution.
05 / Analyzation
From a photo.
To the Venting Pattern.
ID markers establish the reference.
The Hybrid Circumferential Arc Scale follows the roll.
Capture. Measure. Verify.
Illustrative Analyzer view; no live capture.
06 / Bring it together
From a surface
to a specification.
The same window, dimensions and groove inputs become an organized report.
Illustrative output only.
No field analysis or report submission occurs.
VENTING PATTERNILLUSTRATIVE REPORT
SBDG / 102–19–5
EXAMPLE ILLUSTRATION-001

Pattern information
- Indexes / holes / lines
- 102 / 19 / 5
- Window spacing
- 1.406 in
- Roll outside diameter
- 49.910 in
- Suction / blind diameter
- .152 / .087 in
Calculated open area
- Suction
- Groove component
- Total
Grooving / user-supplied variant
- Grooves per inch
- 8
- Width / depth / land
- .030 / .125 / .095 in
Nominal geometry + illustrative assumptions.
Not an as-built record or manufacturing approval.