Industrial Composite 3D Printer


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The FX20 is the largest, most precise, and most capable machine Markforged has ever produced. Other than being the fastest 3D printer in the Markforged portfolio, the FX20 has the innovative capability to print in ULTEMTM 9085 Filament. Usable in production aerospace applications, ULTEM™ Filament brings Markforged’s CFR technology to a new realm of parts.

Printer Specs

Build Volume
525 * 400 * 400 (20.6 * 15.7 * 15.7in)
Layer Height
50µm minimum, 250µm maximum
+/- 125 µm or +/- 0.0015 mm, per mm (whichever is greater)
Plateau d’impression
Heated, Auto Leveling, Replaceable Print Sheets
Print System
Direct device print head with three nozzles (two plastics, one fiber)

What features do you get with FX20? 

  • The FX20 is the largest and most precise machine Markforged has ever produced. Produce mission-critical parts for the most demanding applications, from the factory floor to the skies and beyond. 
  • This large-format 3D printer features an 84L heated build chamber and massive, verified-flat vacuum bed with print sheets. 
  • The motion control system offers closed-loop control through precision linear encoders and is tuned to move the 3kg print head rapidly and accurately. 
  • FX20’s Turbo Mode builds parts faster, while new XL spools offer four times the material without spool changeover. 
  • Remarkably easy to use, a 7-inch touchscreen lets you control every aspect of your printer in one convenient place. 
  • Automated calibration and levelling minimize manual upkeep, while a wide variety of sensors give live feedback on machine performance. 
  • A material bay contains two active XL spools and can store two more with precise moisture control. 

ULTEM™ 9085 Filament 


  • ULTEM™ 9085 Filament is Markforged’s first high-temperature printing polymer. As an extremely durable thermoplastic that exhibits excellent flame, smoke, and toxicity (FST) characteristics it is usable in production aerospace applications. ULTEM™ Filament is available in Markforged’s new 3200cc XL spool, four times larger than standard spools. 
ULTEM 9085_001



  • The go-to Markforged composite for printing accurate parts with a smooth surface finish, Onyx is a Nylon base reinforced with chopped carbon fiber that boasts high chemical and heat resistance. Onyx prints enjoy both a high-end finish and twice the strength of parts from other composite printers. Try printing with embedded carbon fiber reinforcements for aluminum strength parts.

Onyx FR (FR-A)


  • Onyx FR and FR-A offer the strength and reliability of the Markforged flagship Onyx composite material designed specifically for the aerospace and transportation industries. Get strong, light weight, and fire-resistant prints that can even be reinforced with any Continuous Fiber inlay for added durability. The material earned a UL Blue Card and is considered self-extinguishing (V-0) at 3mm or thicker.


*Onyx FR-A and Carbon Fiber FR-A are purpose-built for the requirements of the aerospace, transportation, and automotive industries. Onyx FR-A and Carbon Fiber FR-A as printed on the Markforged X7 are undergoing qualification through the NCAMP process.


Onyx ESD


  • Onyx-level durability that’s stronger, stiffer, and ESD resistant for a wide range of industrial applications. Developed specifically to have an extremely tight range of surface resistances that meet the ESD-safety requirements of even the strictest manufacturers, Onyx ESD is a static dissipative safe variant of Onyx that offers strength, stiffness, and a near-perfect surface finish.


  • As an entry-level continuous fiber material, Fiberglass is perfect for printing parts 10x stronger than ABS, or 2.5x stronger and 8x stiffer than Onyx alone. Print robust tools, jigs, and fixtures with Fiberglass inlays on the Onyx Pro and X5, and on the Mark Two and X7 for a more affordable, accessible carbon fiber alternative.

Fiberglass (HSHT)

  • Of course, High Strength High Temperature Fiberglass (HSHT) is iconic for its aluminum strength and high heat tolerance. Onyx parts reinforced with HSHT are strong at both low and high temperatures and are 5x as strong and 7x as stiff as parts printed in pure Onyx. It’s best used for durable parts designed to operate in high temperatures.

Kevlar (Aramid Fiber)

  • Tough Continuous Fiber for high-impact applications, Aramid Fiber is a Kevlar-based specialized continuous fiber known for its extreme energy absorption. Armor up with Kevlar reinforcement inlays that add strength and durability for parts as stiff as fiberglass and much more ductile. When laid into Onyx or another composite base material, achieve impact-resistant pieces that are nearly immune to catastrophic failure!

Carbon Fiber

  • The literal and symbolic backbone of aluminum-strength, composite 3D printed parts, Carbon Fiber is the classic Markforged high-strength Continuous Fiber. Take advantage of the highest strength-to-weight ratio of the Markforged reinforcing fibers, 6x stronger and 18x stiffer than Onyx! Carbon Fiber reinforcement is commonly used to replace traditionally machined aluminum parts and fixtures.

Nylon (White)


  • Affordable, easily painted, non-abrasive, and durable, Nylon and Nylon White are the materials-of-choice for quick cosmetic prints that are likely to be handled over and over again. Nylon is an unfilled, smooth engineering thermoplastic that is great for ergonomic surfaces and workholding structure.

Carbon Fiber FR

  • Carbon Fiber FR is a flame-retardant variant of Markforged’s unique, ultra-high-strength Continuous Carbon Fiber — when used to reinforce a Composite Base material like Onyx FR, it can yield parts as strong as 6061-T6 Aluminum. It’s extremely stiff and strong, and can be precisely laid down in a wide variety of geometries. Programmatically trace curved features, reinforce holes, and mimic unidirectional fiber layups — all within a few clicks.

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