# CHAMFEREDGE in AutoCAD

> How AutoCAD's CHAMFEREDGE bevels the edges of a 3D solid, prompt by prompt: the edges of one face, Loop, Distance1 and Distance2. Try it free in your browser.

CHAMFEREDGE bevels the edges of a 3D solid. It says the two current distances, then asks for an edge and, after the first, for others on the same face, until Enter: a click takes the edge under the cursor, a point typed the edge drawn through it. An edge the first ones share no face with says `Edges must belong to one face.`, one of another solid `Chamfering multiple bodies not allowed.`. As edges are taken, the solid is drawn as it will be. Enter then asks you to press Enter again to accept, or to change the distances for this chamfer; that Enter makes it.

The first distance runs along the face the edges share; for a lone edge, along the face AutoCAD takes: the front, for a box's top front edge, and the top, for a cylinder's rim. A straight edge between two flat faces becomes a flat strip, the round edge of a hole or a rim a strip of a cone, and chamfers that meet at a corner are joined in a line. The distances are offered again the next time. The solid keeps its layer and properties but loses what made it: a box is no longer a box. The whole command is one undo step. MellowCAD's 3D is solids only, and still partial.

- **Command:** `CHAMFEREDGE`
- **Panel:** [Modify](https://mellowcad.com/docs/commands.md#modify)
- **Try it:** [Open the editor](/draw), type `CHAMFEREDGE` and press Enter.

## At the command line

The engine draws it and writes its history as you would type it: the prompts in AutoCAD 2027's order, with the same option letters.

A box seen from the south-east: CHAMFEREDGE with both distances 6 bevels the two top edges at its front corner, which meet in a line.

```text
Command: CHAMFEREDGE
Distance1 = 1.00, Distance2 = 1.00
Select an edge or [Loop/Distance]: D
Specify Distance1 or [Expression] <1.00>: 6
Specify Distance2 or [Expression] <1.00>: 6
Select an edge or [Loop/Distance]:
Select another edge on the same face or [Loop/Distance]:
Select another edge on the same face or [Loop/Distance]:
Press Enter to accept the chamfer or [Distance]:
Command: ZOOM
Specify corner of window, enter a scale factor (nX or nXP), or [All/Extents/Previous/Scale/Window/Object]: 0.8x
```

## Options

### `Loop` (`L`)

Takes every edge round a face: pick one edge, then `Accept` the loop shown, or `Next` for the loop of the other face the edge belongs to. `Edge` goes back to single edges.

### `Distance` (`D`)

Asks for the first distance, then the second, each typed or as the distance between two points; 0 or less says `Distance too small. *Invalid*`. `Expression` takes one as a formula. At the accept prompt it asks for the base surface's distance and the other surface's, for this chamfer only.

## What it does not do yet

A corner where three chamfered edges meet. A straight edge beside a curved face, a round edge off its cylinder's axis, and any edge of a sphere, a torus, an extrusion or a revolved solid: here they fail with a modeling error. The two arrow grips AutoCAD shows at the accept prompt, one per distance. [`CHAMFER`](https://mellowcad.com/docs/commands/chamfer.md) picking a solid's edge, which AutoCAD also allows. The chamfer drawn as a mesh while you pick, and surfaces.

[What it does and still lacks, in detail (in English)](https://github.com/ovelilla/mellowcad/blob/main/docs/coverage/modify.md#chamferedge--es-achaflanaarista--pt-br-chanfrararesta)

## Questions

### How do I chamfer an edge of a 3D solid in AutoCAD?

Run CHAMFEREDGE, choose `Distance` and give both distances, pick the edges of one face, then press Enter twice: once to end the picking, once to accept. The session's `6` and `6` bevel two top edges of a box.

### Why does CHAMFEREDGE say the edges must belong to one face?

The edges of one chamfer share a face: the first distance runs along it. Chamfer the edges of another face in a second run.

### Why does CHAMFER not work on a 3D solid?

AutoCAD's [`CHAMFER`](https://mellowcad.com/docs/commands/chamfer.md) bevels a solid's edge too, but MellowCAD's does not yet: use CHAMFEREDGE, and [`FILLETEDGE`](https://mellowcad.com/docs/commands/filletedge.md) to round an edge.

### How do I chamfer a hole's edge?

Pick its round edge where it meets the flat face: the chamfer is a strip of a cone round the hole.

## Related commands

- [FILLETEDGE in AutoCAD](https://mellowcad.com/docs/commands/filletedge.md)
- [CHAMFER in AutoCAD](https://mellowcad.com/docs/commands/chamfer.md)
- [SOLIDEDIT in AutoCAD](https://mellowcad.com/docs/commands/solidedit.md)
- [BOX in AutoCAD](https://mellowcad.com/docs/commands/box.md)