Build a pipe flange: 120 mm outer diameter, 50 mm bore, 10 mm…

Analysis

I'll model the flange as three fused/cut solids with one reusable bolt-hole cylinder translated to six positions on the 95 mm bolt circle.

Part · built to dimension · millimetres

Pipe Flange — 120 mm OD, 50 mm Bore, 6× 9 mm Holes on 95 mm BC

Loading the geometry kernel…

6-bolt pipe flange built from one reusable 9 mm bolt-hole cylinder translated to six positions on the 95 mm bolt circle and cut in a single cut() call. Origin (0,0,0) is the centre of the flange's bottom face; the plate spans z 0–10 mm and the 80 mm raised face sits on top (z 10–12 mm). Bolt holes are placed at 0°, 60°, 120°, 180°, 240°, 300°.

Here's the flange model. It's being built in the card now — check the measured size, volume and round-face count against the spec below on the next turn.

How it's constructed

Plate: 120 mm dia × 10 mm thick (z 0–10).
Raised face: 80 mm dia × 2 mm tall, fused on top (z 10–12).
Bore: 50 mm dia cut straight through the full 12 mm stack.
Bolt holes: one 9 mm cylinder defined once, then .translate()d to the six positions on the 95 mm bolt circle (0°, 60°, 120°, 180°, 240°, 300°) and removed with a single cut(holes) call passing the list.

What to verify on the card

Bounding box ≈ 120 × 120 × 12 mm (raised face adds the 2 mm).
Bore ⌀50, raised face ⌀80, six holes ⌀9 — total 7 round faces.
Holes at radius 47.5 → radially 43–52 mm: they clear the raised face (⌀80) and stay inside the ⌀120 rim. Correct by construction.

Downloads: use STEP in SolidWorks (exact solid, mm units preserved); STL for printing; SVG for the drawing views if you want a quick 2D check.

One assumption worth stating: the origin (0,0,0) is the centre of the flange's bottom face, so the plate sits at z 0–10 and the raised face at 10–12. If your SolidWorks assembly expects the mating (bottom) face on a different datum, easiest is a small mate offset there rather than re-modelling.

Want me to add a bolt-hole chamfer/counterbore, adjust the raised-face detail (e.g. a gasket groove), or re-datum it?

Follow-up

Did it build, and does it match what I asked for?

Analysis

Yes — it built, and it matches the drawing. The strongest evidence is the volume: the measured 95.77 cm³ agrees with the value the dimensions alone predict, which only happens if all six holes are present at the right size and radius (a missing hole would show up as extra volume).

Measured vs. specified

Feature	Specified	Measured	Verdict
Outer diameter	120 mm	120 mm	✓
Overall height	12 mm (10 plate + 2 raised face)	12 mm	✓
Plate thickness	10 mm	10 mm (12 − 2 raised face)	✓
Bore	⌀50	present as a round face	✓
Raised face	⌀80 × 2 mm	present	✓
Bolt holes	6 × ⌀9 on ⌀95 BC	6 round faces	✓
Round faces	9 expected	9	✓
Bodies	1	1	✓

Face count is the hole check. The 9 round faces break down as: outer rim, bore, raised-face rim, plus the six bolt holes. The 3 flat faces are the bottom, the plate's top annulus, and the raised-face top. That's exactly the topology of the part you described — no missing or extra holes.

Volume check (independent of the model, from the dimensions): plate π·60²·10 = 113,097 mm³, plus raised face π·40²·2 = 10,053 mm³, minus the bore π·25²·12 = 23,562 mm³, minus six holes 6·π·4.5²·10 = 3,817 mm³ → 95,771 mm³ = 95.77 cm³. Measured: 95.771 cm³.

One note on the card's "specified" list: the line reading "Bolt holes 6 mm" is just the count 6 picking up the card's unit suffix — the spec is six holes of ⌀9, and that's what's in the model. Worth knowing so it doesn't read as a 6 mm hole.

For SolidWorks: download the STEP file — it carries the exact B-rep solid in mm and imports as a single body with the 6-hole pattern. The origin is the centre of the bottom (mating) face, plate spanning z 0–10 and raised face z 10–12.

Want a counterbore or chamfer on the bolt holes, a gasket groove in the raised face, or the datum moved?

Build a pipe flange: 120 mm outer diameter, 50 mm bore, 10 mm thick, six 9 mm bolt holes on a 95 mm bolt circle, and a…

How it's constructed

What to verify on the card

Measured vs. specified

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