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Smooth boundary

Pro tool: free to try. Downloading a model edited with it needs Pro.

Area range 20

Left- or right-click near the boundary to adjust it, or draw a line to redraw it.

Split settings

Cut method

Manual cut

Position Tilt

Click a bounding-box face.

Fit to printer

Printer Edge margin

Number both cut faces

Connectors

Cut face per connector

Connectors

Where connectors go

Connector method

Connector side

Connector area

Connector tolerance

Color

Paint mode

Brush size Edge angle

Mesh check

Checking the mesh…

Triangles—

Holes—

Flipped faces—

Non-manifold edges—

Zero-area faces—

Loose pieces (besides the main body)—

Show open edges on the model

Remove tiny loose pieces

Simplify

Triangles to keep

Triangles—

Size

Scale

Printer & copies

Printer Gap between models

Shapes

Color

Sketch

Group

Arrange

Snap grid

Text

Text height Height / depth

Split in place

Add connectors automatically

Selected regions

Add Pins & Sockets to 3D Models

Click a cut face on a split or cut 3D model, and a pin (the male connector) appears on one side and a matching socket (the female connector) on the part it touches. The connectors leave room for printing tolerance, so your 3D printed parts fit together in exactly the right place.

How to use

First split the model with Split by color, Manual cut or Fit to printer.
Choose a connector shape: cylinder, triangular prism or rectangular prism.
Choose where it goes and click a cut face. Best spot on a face puts it where the face has the most room; Where I click puts it exactly where you click.
Over the cut face, turn the mouse wheel to change its size; hold Shift for finer steps.

Tips

The ⓘ button beside Connector tolerance shows recommended tolerances for your nozzle and material: Tight, Standard or Loose.
Tolerance depends on your printer and filament, so test-fit a pair before the final print.

FAQ

It asks me to click a cut face.

Connectors only go on the flat faces left by a split or a cut.

It says the part isn't closed.

If the color parts of the model are separate pieces, join them first, then cut again.

It says there isn't enough room.

Click further from the edge, or make the connector smaller.

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About

Split3MF splits 3MF, OBJ & STL models into parts for 3D printing.

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