RailCore II 3D Printer

RailCore® II is a Core-XY based Reprap 3D printer designed by J. Steve White & Tony Akens under the CC-Attribution Only license.

Front Side Parts Prints
RailCore II photo RailCore II photo RailCore II photo Prints

Table of RailCore II ZL Versions

  RailCore II ZL RailCore II 300ZL RailCore II 300ZLT
X/Y Printable 250×250 300×300 300×300
Z Printable 280 330 600
ABL Yes Yes Yes
Fusion 360 Model Model Model Model
Bill of Materials BOM BOM BOM
Assembly Guide Guide Guide Guide
Outer dimensions (excl.260mm for loom) 522mm x 445mm x 496mm 572mm x 495mm x 546mm 572mm x 495mm x 830mm

RailCore II Community Resources

Community discussion and support

Read all about the design history of the RailCore II and how it came to be. More questions? Have a look at the General FAQ

General specifications

All models Typical specifications, these may vary by kit and self-source.
Motion system CoreXY with linear rails and lead screws, capable of moving 200-400mm/s
Bed specifications 6.35mm MIC6 cast aluminium tool plate with Keenovo silicone bed heater
Electronics Duet2 + Duex or Duet3 recommended
Probe BL-Touch,IR probe or Piezo are common.
Z step Typically 0.01mm, but dependent on leadscrews and Z steppers. 0.0025mm is possible
Steppers 0.9 degree on XY. 0.9 or 1.8 degree on Z
Parts materials Printed and machined aluminium parts are available
Materials PLA, ABS, PETG, TPU, TPE, PP, HIPS, Ninjaflex, Laywood, Laybrick, Nylon, Bamboofill, Bronzefill, ASA, T-Glase, Carbon-fiber filaments, Polycarbonate, and more.


A special thanks to Filastruder, Duet3d, E3D, SeeMeCNC, Mandala Rose Works, 713 Maker and Project R3D for supporting the project.

RAILCORE is a registered trademark of RailCore Labs, LLC You can support this project by assisting with documentation via our Contributing page.