When Powder-Bed Nylon Beats Filament

A nylon powder bed, whether the heat comes from a laser or another source, fuses a slice inside a cake of powder. The unfused powder holds the part, so you do not design tree supports the way you do for filament. You can nest many parts in one volume, print a living hinge, and leave a channel that would have collapsed on a filament bridge.

The part after the cake

The wait is the cooling. Open the cake early and the parts warp. Then someone has to brush, bead-blast, and pull powder out of every pocket. The surface feels sandy. That is normal, and it matters if the part slides on skin or on another part. Dyeing and vapor smoothing change both the look and the dimensions, so fit them before you call the drawing done.

Filament still wins for a one-off bracket in the next hour, for huge parts, and for materials you already trust on the spool. Powder wins when you need several complex nylon pieces, similar strength in more than one direction, and you can wait for the cake.

• Escape holes are mandatory anywhere powder can be trapped.
• Walls that are too thin wrinkle. Follow the bureau minimum.
• Moving hinges need clearance, then a gentle first flex.
• Quote the cooled, cleaned, and finished part, not the laser time alone.