FILLET and CHAMFER - Corner rounding and bevelling

What it does

• FILLET – makes a rounded corner with the radius you set.
• CHAMFER – cuts a bevelled corner with the distance you set.

The radius and distance are remembered for next time.

Where to find it

• Ribbon: Draw › Modify › Fillet (submenu: Fillet, Chamfer)
• Command line: FILLET (alias F)
• Command line: CHAMFER (alias CHA)

Steps for FILLET

1. Type F and press Enter. The prompt reads FILLET: radius = 3 - pick the first curve, or type a number to change it.
2. Type a new radius, for example 20, and press Enter. Skip this step to keep the current value.
3. Click the first line. At Fillet: now click the second curve., click the second line.
4. You can continue with the next corner. Press Esc to finish.

Shortcut: F 20 or FILLET R 20

Steps for CHAMFER

1. Type CHA and press Enter. Type a distance, for example 15, and press Enter.
2. Click the first line and the second line.

Shortcut: CHA 15 or CHAMFER D 15

Try it: Steel corner bracket

An L-shaped corner bracket cut from 2 mm steel to strengthen a shelf or a frame. Rounded corners are safer to handle and stronger, and chamfered tips look neat.

1. Draw the outline with LINE: L, then 0,0 @100,0 @0,30 @-70,0 @0,70 @-30,0 0,0, and press Esc. FILLET rounds Lines (and a Line with an Arc or Circle) and CHAMFER works on two Lines, so a RECTANG or PLINE outline will not take a fillet.
2. Type F 15 and press Enter. Click the bottom edge, then the left edge. The outer corner becomes R15.
3. While FILLET is still running, type 10 and press Enter. Click the short inside horizontal edge, then the inside vertical edge. The inside corner becomes R10. Press Esc.
4. Type CHA 6 and press Enter. Click the right edge of the short leg, then its top edge. Then click the right edge of the tall leg and its top edge. Press Esc.
5. Screw holes: C, 70,15, 4, Esc, and C, 15,75, 4, Esc.

Challenge: Round the two corners that are still sharp (bottom right and top left) with F 5.

See also

• TRIM and EXTEND
• ARC