Volex Labs / Forge / Knob & handwheel generator — text to CAD.

Knob & handwheel generator — text to CAD.

Describe the knob — diameter, height, grip style (knurled, fluted, lobed), bore and set screw — and Volex Forge returns a print-ready STL or a STEP for machining.

The bore and set-screw flat are sized to your shaft, so the knob grips and turns without slipping.

Generate this part — from £2.99 → How Forge works

Free to try Parts from £2.99 STEP · STL · DXF FEA-verified

What you get

Round, fluted, lobed or knurled grips
Diameter, height and skirt to your dimensions
D-bore or round bore with a set screw
STL for printing, STEP for machining
Ergonomic, printable geometry checked before download

From a plain-English prompt

Fluted control knob, 6 mm shaftExample — your parameters, your file

a 40mm fluted control knob, 25mm tall, 6mm D-bore, M4 set screw, pointer indicator

Parameter	Value
Diameter	40.0 mm
Height	25.0 mm
Grip	Fluted
Bore	6.0 mm D-flat
Set screw	M4
Indicator	Pointer
Export	STL / STEP

Every part is checked before you download it — geometry, and where relevant FEA against textbook theory. See the verification report.

Frequently asked

Will it fit my potentiometer shaft?

Yes — give the shaft diameter and whether it's a D-flat or splined and Forge sizes the bore to match.

Can I add a pointer or dial marks?

Yes, ask for a pointer indicator or index marks and they're modelled in.

Knurled grip for printing?

Knurled, fluted and lobed grips all print cleanly; fluted is the most print-friendly.

Price?

Free to try; parts from £2.99.

More Forge generators

Hinge generator — text to CAD Pipe clamp generator — text to CAD Timing pulley & sprocket generator — text to CAD All of Volex Forge

A knob that grips your shaft.

Free to try · parts from £2.99 · STEP, STL or DXF · every part verified before download.

Generate it in Forge →