What are the main 3D printing technologies available for custom prototyping services?

Quick Answer

Five 3D printing technologies dominate professional prototyping: FDM for economical, strong parts; SLA for high-detail resin parts with smooth surfaces; SLS for durable nylon functional prototypes; MJF for fast, consistent production of nylon parts; and SLM for metal prototypes. The right choice depends on your requirements for strength, detail, material, and budget.

FDM - Fused Deposition Modeling

FDM extrudes molten thermoplastic filament layer by layer. Most economical technology. Layer height: 0.1-0.3mm. Materials: PLA, ABS, PETG, PC, Nylon. Best for: concept models, functional prototypes, jigs and fixtures, and low-cost production aids. Lead time: 1-3 days. Cost: $$.

SLA - Stereolithography

SLA uses a UV laser to cure liquid resin. Finest detail of any technology. Layer height: 0.025-0.1mm. Materials: standard resin, tough resin, flexible resin, castable resin, dental/medical resin. Best for: presentation models, investment casting patterns, dental models, and applications requiring smooth surfaces and fine features. Lead time: 2-5 days. Cost: $$$.

SLS - Selective Laser Sintering

SLS fuses nylon powder using a laser. No support structures needed for complex geometries. Layer height: 0.1-0.12mm. Materials: Nylon 12 (PA12), glass-filled nylon, TPU. Best for: functional prototypes, moving parts, ductwork, and low-volume production parts requiring strength and durability. Lead time: 3-7 days. Cost: $$$.

SLM - Selective Laser Melting

SLM fuses metal powder using a high-power laser. Produces fully dense metal parts. Materials: stainless steel 316L, aluminum AlSi10Mg, titanium Ti64, Inconel 718. Best for: metal functional prototypes, medical implants, and aerospace components. Layer height: 0.02-0.05mm. Lead time: 5-10 days. Cost: $$$$$.

Why Choose SOMI Custom Parts

SOMI Custom Parts offers FDM, SLA, and SLS 3D printing services alongside our CNC machining capabilities. Our engineers help you select the optimal technology for your prototype, considering factors like required strength, surface finish, dimensional accuracy, and timeline. For many projects, we recommend 3D printing for prototypes and CNC machining for production, ensuring the fastest path from concept to market.

Case Study

A product design firm needed 20 prototype iterations of a handheld medical device in 3 weeks. SOMI used SLA printing for the first 10 iterations (high detail for ergonomic testing), then switched to SLS nylon for the final 10 iterations (functional testing of snap-fits and hinge mechanisms). The rapid iteration cycle reduced their development timeline by 60%.

Industry Data

The global 3D printing services market reached $20.4 billion in 2025. SLA and SLS together account for 45% of all professional prototyping services. FDM accounts for 30%, metal printing for 15%, and other technologies for 10% (Wohlers Report, 2025). The average time from design to physical prototype has decreased from 2 weeks to 48 hours over the past decade.

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