Railcore II 300ZLT Assembled


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Note that the fully assembled version includes MiSUMi linear rails, a PanelDue 5i touchscreen display, and Magnum idlers.

We have worked with Railcore Labs to bring you the Railcore II 300ZLT Fully Assembled Printer! 

The Railcore II 300ZLT is a CoreXY based, open source 3D printer. Its features include a robust design, lightweight and stiff motion system, premium hot end, and cutting-edge automatic calibration features.  The printer comes complete with all the components needed to complete your printer from the aluminum stepper brackets from to the 3D printed parts. If there is an aluminum part available for the RailCore these units will have them! All printed structural printed parts are be printed out of Atomic Filaments CF PETG and non structural parts are printed out of Atomic Filaments Dark Cherry PLA. 

We believe the Railcore II 300ZL is the king of 3D printers but don't just take our word for it, check out what Joel Telling, the 3D Printing Nerd, had to say:


    • CoreXY motion system
    • 300 x 300 x 600mm build volume (11.8" x 11.8" x 23.6")
    • Outer dimensions: 18.5" deep 24" wide, and 36" high without the cable bundle, 42" high with
    • 1.75 mm filament
    • E3D V6 Gold edition with 0.4mm hardened nozzle and 40w heaters or Slice Engineering Mosquito with 0.4mm vanadium nozzle and 40w heater.
    • Layer height down to 0.01 mm
    • Faster printing: 200+ mm/s
    • Max Hot End Temperature: 290°C (Optional PT100 or K-type thermocouple to reach 400C)
    • Bed specifications: 6mm thick MIC6 aluminum, 750w heater
    • Max Bed Temperature: 120°C
    • Input power: 120VAC, 10A, 50/60Hz, optional 240VAC/5A
    • Supported materials – PLA, ABS, PETG, TPU, TPE, PP, HIPS, Ninjaflex, Laywood, Laybrick, Nylon, Bamboofill, Bronzefill, ASA, T-Glase, Carbon-fiber filaments, Polycarbonate, and more!


    • Duet 2 Wifi/Ethernet motherboard with Duex5 Expansion, so the E3D Toolchanger can be easily implemented
    • Quiet Trinamic drivers with 256x microstepping
    • Genuine Gates belts, pulleys, and idlers
    • True automatic bed leveling/tramming
    • Bondtech BMG extruder - filament is driven from both sides
    • BLTouch Probe
    • Keenovo Heated Bed
    • Aluminum X carriages, Stepper and idler mounts machined from 6061 alloy by Mandala Rose Works
    • Meanwell LRS-350-24v Power Supply (24v, 14.6A)
    • Zyltech or Misumi linear rails available
    • 8x2mm pitch lead screws with Delrin Nuts
    • LDO 1.8 degree steppers for Z to give .01mm per step
    • LDO 0.9 degree steppers for X,Y and Extruder
    • Complete, labeled wiring harness
    • All necessary 3D printed parts included
    • Compatible with an optional filament sensor (magnetic or laser)

    In order to limit the use of printed parts as structural components, the printers come standard with aluminum stepper motor mounts, idler mounts and X-axis carriages from Mandala Rose Works. The aluminum beds are milled out of MIC 6 plate to ensure it is completely flat.

    We are shipping a complete plug and play wiring harness system with each printers! You no longer have to deal with cutting stripping and crimping your own wires. You will get all components and hardware needed to build the printer, from linear rails to nuts and bolts. All you need is the tools and the time, we have everything else covered!

    A portion of all sales go to J. Steve White and Tony Akins, the guys behind RailcoreLabs who created the open source Railcore project.

    For a quick reference on which parts are included vs options and aluminum vs printed on which model, please see the below graphic: 

    Rail Options

    • MiSUMi: A premium choice, MiSUMi linear rails are known for their excellent quality. These are used on the X/Y axes on the ZLT, with Zyltech rails used on the Z axis.

    Hotend Options

    • BYOH: This option comes with no hotend but it will include an E3D Premium Heater and thermistor to maintain the plug and play feature of the wiring harness. Note that no hotend mount is included if this option is selected.
    • V6 Gold: The V6 Gold comes with a plated copper block, E3D Premium Heater, thermistor and 0.4mm Hardened Steel Nozzle.
    • Mosquito: The Mosquito comes with an E3D Premium Heater and thermistor with a 0.4mm Hardened Steel Nozzle
    • Mosquito Magnum: The Mosquito Magnum comes with a E3D Premium Heater and thermistor with a 0.8mm Hardened Nozzle for large prints. 

    Electronics Options

    • Duet 2 Wifi: The Duet 2 Wifi is a market-leading control board, with wifi support.

    Display Options

    • PanelDue 5i: A 5" LCD touchscreen display for interfacing with the printer. Duet Web Control is still available. Printed mount not included, but many options are available. Here is one.

    Bed Options

    • Standard: The standard bed is a 1/4” sheet of MIC6 aluminum that will come with a 12”x12” sheet of Buildtak.

    Power Options

    • 120vAC/US plug: Comes with a standard US plug and 120v bed heater.
    • 240vAC/EU plug: Comes with a standard EU plug and 240v bed heater.

    Tools Required to Complete the Build

    • Hex Wrenches 2mm, 2.5mm and 3mm