Design your next knife at true size.
Plungeline is a drawing tool made for knifemakers. Draw the blade, spring and handle in millimetres or inches, swing a folder's blade to check it, and send the parts to your laser, your CNC or your printer at exactly the size you drew them.
Free while it's in beta. Runs in your browser on a phone, tablet or computer, with nothing to install.
Check a folder before you cut steel
Put the pivot on the blade and the handle, then swing the blade through open, half-stop and closed. Turn on the sweep to see every position at once, and catch a tip that hits the spring or a tang that won't sit right.
Set the angles where your blade stops closed and at half-stop, and edit the blade while it's swung: changes land in the drawing where you put them.
Trace a drawing you already have
Import a photo, a scan or a PDF and set its scale from one length you know, like a ruler in the shot. Draw over it by hand, or let Auto trace and Magnetic trace follow the edges for you. The original stays underneath, locked, while you work.
The details knifemakers keep drawing
- Pins and holes
- Sized by diameter, and copied through blade, spring and handle in one go so they line up.
- Jimping
- Half-round or V notches at the pitch and depth you set, following the curve of the spine.
- Real units
- Millimetres or inches, with rulers, a grid and snapping. A part that measures 182.4 mm on screen is 182.4 mm in the file.
- A layer for each part
- Blade, spring, handle and scales each on their own layer, in their own colour, to hide, lock or export.
Ready on the phone in your apron pocket
Plungeline works by touch, with its panels tucked into a sheet at the bottom of the screen. Add it to your home screen and it opens like an app.
Sign in and your designs save to your account as you work, ready on whichever device you pick up next.
Out to the shop
Every export is at true size. Exporting needs a free account.
| File | For |
|---|---|
| SVG | Laser, CNC and cutter software such as LightBurn, or editing in Inkscape and Illustrator. Imports at true size with no scaling. |
| Parts sheet PDF | Each part laid out on A4 or US Letter, to print, cut out and stick to your stock. |
| PDF as shown | Sharing the design, or printing it as it looks on screen. |
| Plungeline file | The whole design, to keep a copy or send to someone. |
Start from an example
Open Lanny's Clip or the Swayback from the File menu, take them apart, and make them your own.
Open Plungeline