Key principles.
Critical decision
Build orientation affects surface finish, mechanical properties, support structures, and cost. Optimize before sending to print.
Minimize them
Supports add cost and post-processing. Self-supporting overhangs ≤ 45° from vertical eliminate most supports.
Reduce mass
Internal lattice structures reduce mass while maintaining stiffness. Common 30-70% lattice density.
Multi-piece into one
Combine multi-piece assemblies into single printed part. Reduces fasteners, weight, assembly labor.
Drain holes
Hollow parts save material/time. Add drain holes for resin or powder removal.
Z-direction weaker
Most processes weaker in Z (between layers). Orient with critical loads in XY plane.
FAQ
For complex internal geometry impossible to machine, lattice/topology-optimized parts, low-volume custom parts. CNC wins for simple geometry, tight tolerance, production volumes.
SLA for fine detail prototypes, MJF for production nylon, DMLS for metal, FDM for large parts and aerospace polymers. Each has trade-offs.
SLA ±0.1 mm, SLS/MJF ±0.2 mm, DMLS ±0.2 mm. Post-machining critical features achieves ±0.025 mm CNC tolerance.
Per-part cost depends on volume and complexity. Additive economical for low volume; CNC for higher volume. Total geometry advantage often justifies additive premium for specific parts.
Photopolymer (SLA), nylon PA12 (SLS/MJF), titanium/Inconel/aluminum (DMLS), Ultem 9085 aerospace (FDM), thermoplastic blends. Material selection narrower than CNC.
Support removal, bead blast, sometimes vapor smoothing or paint. CNC machining for tight-tolerance features. Heat treatment for metal additive.
Get an instant quote
Send your CAD — we reply with detailed pricing, lead time, and DFM feedback within 4 working hours.
Talk to an engineer
WhatsApp our team directly. Most messages answered within 12 minutes during work hours.
Explore all services
CNC, 3D printing, injection molding, sheet metal, casting, finishing — one quality system, one partner.
Working on a live project? Send the STEP file and the two or three features you are unsure about — an engineer replies with DFM notes and a price, usually within four working hours.
