FDM 3D Printing Services
XC Machining provides FDM 3D printing for US product teams. A heated nozzle extrudes thermoplastic at 100 to 300 μm layers, in parts up to 914 × 610 × 914 mm. Standard tolerance is ±0.2 mm. First parts ship in 1 to 5 business days.
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What Is FDM 3D Printing at XC?
Fused deposition modeling (FDM) pushes molten thermoplastic filament through a 0.4 mm nozzle. The nozzle follows CNC-programmed toolpaths and lays down layers 100 to 300 μm thick. Each layer cools and bonds to the one below.
FDM runs from PLA to PEEK and ULTEM at a low cost per part. It also builds the largest parts of any polymer process XC runs.
Large-Format FDM for US Teams
US teams send XC the big jobs: body panel mockups, enclosures and fixtures. XC Machining builds them at its Dongguan factory and ships worldwide by express courier. Engineers pick the material and the build orientation with you, and the quote comes back within 12 hours.
FDM 3D Printing Tolerances
Accuracy depends on the machine class and the material. See our rapid prototyping page for how FDM fits early builds.
| Item | Specification |
| Precision tolerance | ±0.2 to 0.5 mm on desktop machines, ±0.13 mm on industrial FDM |
| Z-axis tolerance | 20 to 30% looser than XY |
| Layer thickness | 100 to 300 μm |
| Minimum wall thickness | 0.8 mm |
| Minimum part size | 20 × 20 × 1 mm |
| Maximum part size | 914 × 610 × 914 mm on industrial FDM |
| Production volume | Prototyping 1 to 100 pieces, low volume 101 to 5,000, high volume above 5,000 |
| Lead time | 1 to 3 business days for small parts, 3 to 5 days for large or engineering-grade parts |
FDM Shrinkage and Orientation Guide
FDM parts shrink as they cool and bond weaker between layers than within them. Plan for both before you print.
| Material | Shrinkage | XY tensile strength | What XC does |
| PLA | 0.3% | 60 MPa | Pre-scales the model in slicing |
| ABS | 0.8% | 40 MPa | Pre-scales the model in slicing |
| Nylon | 1.5 to 2.0% | 50 to 85 MPa | Pre-scales and suggests a test coupon on critical fits |
Z-axis strength is only 50 to 75% of XY strength. XC orients each part so the main load runs along the XY plane. Sanding removes 0.05 to 0.2 mm per surface, so we scale critical features up first.
Why Choose XC for FDM Printing
XC FDM offers the largest build volume at 914 × 610 × 914 mm. It also runs a full thermoplastic range from PLA to ULTEM at a low cost per part. Standard tolerance is ±0.2 mm. DFM review takes 12 hours, and parts ship in 1 to 5 business days.
Industrial FDM prints parts up to 914 × 610 × 914 mm in one build. That suits automotive body panel prototypes, 1:1 architectural models, large enclosures and furniture or appliance mockups. Bigger parts print in sections and bond with structural adhesive.
Filament costs $15 to $80 per kg. SLA resin costs $100 to $400 per liter, and SLS powder costs $80 to $200 per kg. With no tooling, 15 to 20% infill and fast print speeds, FDM models cost 50 to 70% less than SLA or SLS above 50 cm³.
Materials run from PLA at 60 MPa for concept models to PEEK at 100 MPa for chemical and heat duty. The Materials section lists every grade. Engineers recommend one during DFM review, based on temperature, chemicals, load and regulatory needs.
Upload an STL or STEP file. Engineers check anisotropy against the main load axis, wall thickness, overhangs and supports. They also set infill, pick the material and add shrinkage compensation on critical fits. Every review includes a build orientation that maximizes Z-axis strength.
Finishes for FDM Printed Parts
FDM parts show layer lines, a staircase effect from the 100 to 300 μm layer height. The lines run across the build direction and show most on curves. The table lists the fixes. Our surface finishing page adds the other finishes XC applies.
As printed to Ra 6 to 16 μm. Visible layer lines. Support-side faces run Ra 8 to 20 μm. Fine for fixtures, jigs and internal parts.
Sanding to Ra 1.6 to 3.2 μm. Wet or dry from 120 to 400 grit. Removes 0.05 to 0.2 mm per surface, so XC scales critical features up.
Priming and painting to Ra 0.4 to 1.6 μm. Automotive primer and polyurethane topcoat, 80 to 140 μm in total, in RAL or Pantone colors. Adds ±0.04 to 0.07 mm.
Acetone vapor smoothing to Ra 0.5 to 2 μm. ABS only. Vapor re-flows the outer layer into a sealed semi-gloss surface. Shrinks parts 0.05 to 0.15 mm.
Epoxy coating to Ra 0.1 to 0.4 μm. Brush or spray two-part epoxy, then sand lightly. Gives a hard, high-gloss shell and a 20 to 40% harder surface.
Functional coatings to Ra 1.6 μm on plated parts. Copper or nickel plating on ABS for EMI shielding. Anti-static coats for ESD jigs. Ceramic coat to 250°C on PEEK and ULTEM. Films run 5 to 50 μm.
Epoxy suits display models, master patterns for investment casting and outdoor parts that need UV and moisture resistance.
FDM Materials We Print
The table merges every grade XC lists. Ask for the filament datasheet before you rely on a strength figure. Our materials page compares materials across processes.
| Material | Key figure | Best for | Colors listed |
| PLA (prototyping) | 60 MPa | Concept models | Black, blue, red, white |
| PETG | 50 MPa | Chemical resistance, food-contact parts | On request |
| ABS-M30 | 40 MPa (ABS) | Functional housings. Acetone smoothable | Black, blue, dark gray, ivory, red, white |
| ABS-ESD7 | Static dissipative | ESD-safe parts and jigs | Black |
| ABSi | Translucent | Light-passing parts | Translucent natural, amber, red |
| ASA | 45 MPa | UV-stable outdoor parts | Black, dark blue, dark gray, light gray, green, ivory, orange, red, white, yellow |
| Nylon 12 | 50 to 85 MPa | Tough, fatigue-resistant parts | Black |
| PC | 65 MPa | High-impact parts | White |
| PC-ABS | Not listed | Impact parts with ABS processing | On request |
| PC-ISO | Not listed | Polycarbonate parts | Translucent natural, white |
| TPU | Shore A 85 to 95, 300 to 600% elongation | Flexible parts | On request |
| PEEK | 100 MPa, 250°C service | Chemical and heat duty | On request |
| ULTEM 9085 (PEI) | 73 MPa, 217°C HDT | Aerospace FST-rated, sterilizable parts | Black, tan |
| ULTEM 1010 | Not listed | High-heat PEI parts | Amber (natural) |
Nylon, PC, PEEK and ULTEM build in a heated chamber, which adds lead time. PEEK and ULTEM are not available in SLS, SLA or MJF.
Our Fused Deposition Modeling (FDM) Prototype Manufacturing Capabilities
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Uses cutting, bending, and forming techniques to produce precision metal components suited for industrial, commercial, and manufacturing applications.
Specialist Industries
Bring Your Designs to Life with XC Machining
Experience precision engineering with XC Machining. From detailed prototypes to high-volume production, we’re here to turn your concepts into reality. Contact us today to discuss your project needs!
- 50+ CNC machines in-house
- 60+ materials in stock
- 120+ countries shipped
- 15+ DFM engineers on staff
- All uploads are secure and confidential
FDM 3D Printing FAQs
What tolerance does XC hold for FDM 3D printed parts?
Desktop FDM holds ±0.2 to 0.5 mm, depending on material and machine. Industrial FDM holds ±0.13 mm as standard. Z-axis tolerance runs 20 to 30% looser than XY. XC pre-scales for shrinkage of 0.3% in PLA, 0.8% in ABS and 1.5 to 2.0% in nylon. For critical assemblies, print a test coupon first and measure real shrinkage.
What is anisotropy in FDM 3D printing?
FDM parts are weaker between layers. XY strength runs 40 MPa in ABS, 60 MPa in PLA and 50 to 85 MPa in nylon. Z-axis strength is only 50 to 75% of that. XC engineers orient each part during DFM review so the main load runs along the XY plane, which maximizes functional strength.
What materials are available for FDM at XC?
XC prints PLA at 60 MPa, ABS at 40 MPa, PETG at 50 MPa and ASA at 45 MPa for outdoor use. Nylon PA12 gives 50 to 85 MPa, and PC gives 65 MPa. TPU is flexible at Shore A 85 to 95. PEEK reaches 100 MPa at 250°C service, and ULTEM PEI reaches 73 MPa with a 217°C HDT.
What is the maximum part size for FDM at XC?
Industrial FDM at XC builds parts up to 914 × 610 × 914 mm, the largest polymer print volume XC offers. Larger parts print in sections and join with structural adhesive and mechanical fasteners into one assembly. For parts above 340 mm in any direction, FDM is the usual choice for large-format prototypes.
What is the lead time for FDM parts at XC?
Small to medium parts under 300 mm in PLA, PETG or ABS ship in 1 to 3 business days. Large-format parts over 300 mm, or engineering grades like nylon, PC, PEEK and ULTEM that need heated chamber builds, take 3 to 5 days. Rush delivery of 24 hours covers small, simple PLA or PETG parts. DFM review and quote take 12 hours.
When should I choose FDM instead of SLS or SLA?
Choose FDM when the part is larger than 340 mm, when it must be PEEK or ULTEM, or when cost matters most. FDM runs 50 to 70% cheaper per cm³ than SLA or SLS on large solid parts. It also suits jigs and fixtures at 1-day turnaround and overnight iteration on simple shapes.
What is infill density and how does it affect strength?
Infill density sets how much solid material fills the part between its walls. At 15 to 20% the part is light and holds 30 to 40% of solid strength. At 50 to 60% it balances weight and function. At 80 to 100% it is near solid for tooling. A gyroid pattern gives the best isotropic strength at a given density.
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