Question 1

What should I upload for an MJF quote?

Accepted Answer

Upload 3D CAD (STEP preferred) and any drawings defining CTQs (datums, mating faces, functional clearances, hole requirements), target finish (as-printed / bead-blast / dyed), target quantity, and any requirements for inserts, secondary machining, or inspection documentation.

Question 2

Does MJF require support structures?

Accepted Answer

No—parts are supported by the powder bed during the build. Design still needs powder-aware features (escape paths, cleanout access) and distortion control for long/flat geometries.

Question 3

How do you handle trapped powder in hollow parts?

Accepted Answer

We recommend powder escape holes and cleanout access. For deep cavities, we add multiple escape paths and plan depowdering steps to reduce retained powder and ensure consistent weight and function.

Question 4

Can you hit tight fits and hole tolerances with MJF?

Accepted Answer

Many functional fits work well with proper clearance design. For CTQ holes or alignment faces, we plan secondary ops like drilling/reaming or light machining to improve repeatability in assemblies. Use our ***ISO 2768 chart***(/resources/charts/iso-2768-tolerance-chart) and ***tap drill calculator***(/resources/tools/drill-tap-chart) when specifying mating features.

Question 5

What finishing options do you support for MJF parts?

Accepted Answer

Common programs include bead-blast/shot-peen for a more uniform matte finish and optional dye for color. We align finishing to cosmetic requirements and functional clearance needs.

Question 6

What drives cost in MJF printing?

Accepted Answer

Key drivers include part volume and nesting density, build time, material choice (PA12/PA11), finishing (bead-blast/dye), and whether CTQ features require inserts or secondary machining.

Multi Jet Fusion(MJF)

Multi Jet Fusion(MJF)