Use the Knob & Thumb Screw Generator STL
Generate parametric 3D printable knobs and thumb screws with scalloped, knurled, lobed or hex grips and round, D-shaft, double-D.
- Free to use
- No signup
- Nothing to install
- Runs in your browser
A 30 mm knob, 12 mm high with 8 scallops and an M6 screw hole gets a 10 mm across-flats hex pocket 5.4 mm deep on its underside.Open the Knob & Thumb Screw Generator STL
Illustration. Open the tool for the real thing.
See it in action
The Knob & Thumb Screw Generator STL with sample data entered and the result showing.
What is the Knob & Thumb Screw Generator STL?
A knob is one of the most frequently printed small parts and one of the fiddliest to model. Choose a diameter, height and grip style — scalloped, knurled, lobed, hex or plain — and the number and depth of the flutes, then pick the hole: round shaft, D-shaft (potentiometers and small motors), double-D, blind hole, or a screw hole with a hex nut trap for M3 to M8.
The knob is built as a watertight solid, previewed in 3D and downloaded as STL, 3MF or OBJ. Clearance on the holes is adjustable for your printer. Everything runs in your browser.
3 steps to your result
Open the tool and follow along. Nothing to install.
What you get
Scalloped, knurled, lobed, hex, plain round.
Round, D, double-D and blind.
Hex pockets sized for M3–M8 nuts.
Adjustable hole tolerance.
AZRS tools are free to open and use.
It opens in your browser, so there is nothing to download.
Used for
Pick one to see how it fits.
How it compares
A plain look at this tool next to the usual alternative.
| This maker tool | Desktop software | |
|---|---|---|
| Install | Nothing to install | Usually an app or program to install |
| Account | No signup | Depends on the product |
| Cost | Free to use | Free or paid, depends on the product |
| Where it runs | In your browser tab | On your computer |
Questions people ask
Does it print without supports?
Yes, flat side down.
What hex nut sizes are included?
M3, M4, M5, M6 and M8.
Can I make a D-shaft hole?
Yes, set the shaft diameter and flat width.
Is it free?
Yes.
How do I use the Knob & Thumb Screw Generator STL?
1. Set diameter, height and grip style. 2. Pick the shaft or screw hole type. 3. Adjust clearance. 4. Download the knob.
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Try the Knob & Thumb Screw Generator STL now
Design fluted, knurled or lobed knobs with round, D-shaft or screw hole with hex nut trap. Free to use.
Try it free