Functional Prototypes
Validate fit, geometry, assembly, and real-world performance quickly.
FDM-First Additive Manufacturing
Industrial 3D Printing Services
Instant FDM estimates. Engineering-led manufacturing.
From custom jigs and fixtures to functional prototypes and low-volume production parts, Relay helps engineers turn CAD into manufacturable components. Upload your design for an instant preliminary price. We review material selection, critical features, printability, and production requirements before confirming the formal quote.
No account required · CAD upload · Instant preliminary pricing · Engineer-reviewed formal quotes
Application ReviewPart requirements reviewed before process selection.
Engineering-Led DFMPractical process, material, and printability feedback.
Prototype to ProductionOne-off validation parts through repeat low-volume runs.
US-Based ServiceDirect communication and accountable support.
Real Relay projectCustom 3D printed welding fixture built as a functional manufacturing aid.
Our Core Process
FDM Is the First Place We Look, Not the Only Place
FDM is Relay's primary process because it is fast, flexible, and cost-effective for a wide range of functional plastic parts. Relay approaches each request from the part’s real requirements first — strength, environment, geometry, quantity, finish, and delivery — rather than forcing every project into the same material or print settings.
Engineer-Reviewed RFQsYour application and CAD are reviewed for process, material, and manufacturability before quoting.
Fast Human Follow-UpMost requests get a reply within one business day; complex jobs may need a clarification step.
NDA-Friendly UploadsNeed an NDA? Upload it with the RFQ and Relay can review it before project work proceeds.
Common CAD & Reference FilesSTEP/STP, STL, IGES/IGS, OBJ, PDF, images, and ZIP files are supported by the RFQ uploader.
Common Applications
Built for the Parts Engineers Actually Need
FDM is especially useful for functional prototypes, manufacturing aids, custom enclosures and housings, custom plastic components, and low-volume parts that need fast iteration without dedicated tooling.
Jigs & Fixtures
Custom production aids for repeatability, positioning, handling, and inspection.
End-Use Parts
Durable components for real service when material and design are appropriate.
Low-Volume Production
Produce short runs and repeat orders without committing to mold or hard-tooling cost.
Large-Format FDM
Oversized parts, tooling, fixtures, patterns, and full-scale prototypes. Explore large-format capabilities →
Technical Fit at a Glance
Tell us where the part can fail.
The fastest path to a useful quote is not a long specification sheet. Send the CAD and identify what actually matters in service. Relay can separate critical requirements from dimensions or finishes that do not need special treatment.
Mechanical InterfacesPress fits, bearings, inserts, threads, mating parts, datums, and critical clearances.
Service EnvironmentHeat, UV, moisture, chemicals, wear, impact, and sustained loading.
Production ContextOne-off validation, changing designs, repeat orders, and low-volume production.
Process FitIf FDM is not the sensible route, Relay can flag that before you spend money forcing the wrong process.
Materials
Material Choices Matched to the Application
From easy-to-iterate prototype materials to tougher engineering polymers and reinforced filaments.
PLA / PLA+
Dimensionally stable and economical for visual models, fixtures, fit checks, and fast prototype iteration.
Prototype / GeneralPETG
Tough, versatile, and moisture resistant for functional parts, guards, brackets, and shop applications.
FunctionalABS
A durable engineering thermoplastic for functional housings, assemblies, and moderate-temperature environments.
Tough / HeatASA
ABS-like mechanical performance with improved UV and weather resistance for outdoor applications.
Outdoor / UVTPU
Flexible and impact-absorbing for seals, protective components, compliant features, feet, and grips.
FlexibleNylon / PA
Durable, wear-resistant material for demanding mechanical parts, clips, hinges, and functional components.
EngineeringPolycarbonate / PC Blends
Higher heat resistance and toughness for applications that exceed general-purpose thermoplastics.
High PerformanceCarbon-Fiber Reinforced
Stiffer reinforced polymers for fixtures, tooling, structural parts, and dimensionally demanding applications.
Stiff / StructuralGlass-Fiber Reinforced
Reinforced options that balance strength, stiffness, durability, and temperature performance.
ReinforcedOther Engineering Materials
Have a specific resin, filled polymer, or performance requirement? Include it in the RFQ and we'll evaluate the best route.
Application-SpecificWhy Relay
Engineering-Led, Not Just Print-and-Ship
Direct Engineering Review
The quote starts with how the part will be used: load, interfaces, environment, quantity, finish, and deadline—not just whether the geometry fits a printer.
Direct Project Communication
Questions and tradeoffs stay close to the people reviewing manufacturability and production instead of disappearing into a sales handoff.
Prototype Through Repeat Production
Start with one-off validation, revise the design when needed, and move into repeat low-volume builds when the part and economics are ready.
Right Process Over Forced FDM
If FDM is a poor fit for the geometry, finish, material, quantity, or risk profile, Relay can flag that before you spend money forcing the wrong process.
Questions Engineers Ask
Industrial 3D Printing FAQs
Which 3D printing process should I use?
Start with function, geometry, material, finish, quantity, critical interfaces, environment, and deadline. FDM is Relay's first choice when it fits, while SLS/MJF, SLA/DLP, DMLS, sand binder jetting, or another process may make more sense when the application demands it.
Can I get an instant 3D printing quote?
Yes for FDM. Upload CAD, select material and quantity, and Relay's instant estimator provides preliminary pricing immediately. The formal quote is engineer-reviewed before it is emailed. Other additive processes are handled by engineering quote.
What information affects a 3D printing quote?
Geometry, material, quantity, application, tolerances, critical interfaces, finish, service environment, deadline, support requirements, and downstream assembly or inspection can all affect the manufacturing route and final price.
What part sizes can you quote?
Send the dimensions or CAD. The best approach depends on geometry, material, machine envelope, and whether a larger component can be split or assembled. Relay also evaluates large-format FDM for oversized parts.
Which material is right for my application?
That depends on temperature, loading, chemical exposure, outdoor use, stiffness, impact resistance, wear, and finish requirements. If you are unsure, describe the use case and Relay can help narrow the material family.
Can 3D printing work for low-volume production parts?
Often, yes. Additive manufacturing can be a strong option when the volume does not justify tooling, designs are still evolving, or the geometry benefits from a digital manufacturing process.
Additional Additive Options
FDM First. Other Processes When They Make More Sense.
FDM is Relay's core focus, but it is not the only route we can evaluate. If surface finish, geometry, batch economics, material, or scale point elsewhere, we can quote an alternative instead of forcing the project into the wrong process.
Polymer Powder Bed
SLS / MJF 3D Printing
Engineering-quoted nylon parts for complex geometry, nested batches, functional assemblies, and repeat production. Learn more →
High Detail
SLA / DLP 3D Printing
Engineering-quoted resin printing for fine features, smoother surfaces, visual prototypes, molds, and specialized resin properties. Learn more →
Foundry Additive
Sand Binder Jetting
Printed sand molds and cores for prototype castings, complex internal passages, low-volume work, and tooling-intensive foundry programs. Learn more →
Metal Additive
DMLS Metal 3D Printing
Engineering-quoted metal additive manufacturing when true metal performance and additive geometry justify the process. Learn more →
Scale & Tooling
Large-Format FDM
For oversized parts, tooling, patterns, fixtures, and full-scale prototypes that exceed a typical desktop build envelope. Explore LF-FDM →
Ready for an Engineering Review?
Send the CAD. Tell Us What the Part Needs to Do.
Upload your file, quantity, application, target date, and critical requirements. Relay will review the job for process fit, material, manufacturability, and a practical path to production before quoting.