What file formats do I get for a bolted flange?

STEP (solid CAD for machining and further design), STL and 3MF (3D printing), and DXF (laser and waterjet flat profiles).

Yes. Describing the part and viewing the 3D preview is free. Downloading the manufacturable files is £2.99 per part, or unlimited on Pro (£29/month or £290/year).

Volex Forge › Parts › Bolted Flange CAD Generator

Generate a bolted flange

Q: Can I change the dimensions?

Yes. Every dimension is editable after generation — adjust the numbers directly, or describe the change in plain English. Edits are rebuilt and re-checked.

A disc with a central bore and bolt holes on a pitch circle, used to join two components face to face. The bolt circle diameter (PCD) and hole count must match the mating flange exactly.

Generate this part — free preview

“A circular flange 120mm diameter, 15mm thick, 25mm centre bore, 6 M6 bolt holes on 90mm pitch circle”

Open in Volex Forge →

Buy one ready-made

Already built, measured against its own description and priced. No need to describe it first.

flange dn50 pn16

What it is used for

Pipe and duct connections
Shaft and coupling faces
Pump, motor and valve mounting
Pressure-vessel connections

Dimensions that matter

Outside diameter	Overall disc size.
Thickness	Resists bending from bolt clamping.
Centre bore	The through-hole.
Bolt circle (PCD) and hole count	Must match the mating part.

State the PCD explicitly — “6 M6 holes on a 90 mm pitch circle” is unambiguous. The engine counts the real bores in the finished solid, so a missing hole is caught rather than shipped.

What you get

A real solid model you can rotate and measure, plus downloadable STEP (machining and CAD), STL and 3MF (3D printing) and DXF (laser and waterjet) files. Optional built-in analysis covers stress (FEA), thermal, buckling, cost and manufacturability.

Before you see it, the built geometry is measured against the dimensions you stated, checked as a valid watertight solid, and — for assemblies — checked for interference. These are geometry and physics checks; they do not confirm the shape matches what you pictured, so review the 3D view or 2D drawing before relying on the part.

Previewing is free. Downloading is £2.99 per part, or unlimited on Pro (£29/month, £290/year).

Common questions

What file formats do I get?
STEP, STL, 3MF and DXF — the formats CNC shops, laser cutters and 3D printers accept.

Can I change the dimensions afterwards?
Yes. Edit the numbers directly, or describe the change in plain English. Every edit is rebuilt and re-checked.

Do I need CAD experience?
No. Describe the part and its sizes in millimetres.

Is it free to try?
Yes — describing a part and viewing the 3D preview costs nothing.