For larger prints
Elegoo Neptune 3 Max
An open-frame FDM printer with a 420 × 420 × 500 mm nominal build volume, 63-point mesh leveling, and a nozzle advertised up to 260°C per Elegoo.
In short The Elegoo Neptune 3 Max is an open-frame filament (FDM) 3D printer with a 420 × 420 × 500 mm (16.5 × 16.5 × 19.7 in) build volume.
Documentary analysis · Not personally tested
FDM · Open frameWhy consider it?
A 420 × 420 × 500 mm build volume, 63-point mesh leveling, a magnetic PEI build plate, and a dual-gear extruder capable of handling TPU per Elegoo.
What to verify
The frame stays open with no enclosure, and a bed this large heats up slowly and needs floor space. Exact box contents should be checked on the retailer's listing.
Elegoo Neptune 3 Max specifications
- Technology
- Filament (FDM)
- Build volume
- 420 × 420 × 500 mm (16.5 × 16.5 × 19.7 in)
- Enclosure
- Open frame
- Multicolor
- No stock multicolor system; a single extruder with dual-gear direct drive, identical to the rest of the Neptune 3 lineup per Elegoo.
- Materials
- PLA, TPU, PETG, ABS, and ASA per Elegoo, sharing the same hotend as the Neptune 3 Pro and Neptune 3 Plus.
Manufacturer documentation reviewed September 12, 2026. Build volume is nominal: orientation, supports and reserved zones can reduce the usable space.
Which projects is it for?
The Neptune 3 Max pushes the Neptune 3 lineup to its largest footprint, with a 420 × 420 × 500 mm nominal build volume per Elegoo, for bulky parts in a single print (covers, stands, furniture printed in a limited number of pieces).
63-point mesh leveling, denser than on the Pro and Plus, aims to compensate for irregularities that show up more on a bed this large and to keep the first layer reliable despite the size.
Materials and setup
The Neptune 3 Max shares the same nozzle kit as the Neptune 3 Pro and Neptune 3 Plus per Elegoo's own store listing, with a nozzle advertised up to 260°C compatible with PLA, TPU, PETG, ABS, and ASA.
The dual-gear direct drive extruder, presented by Elegoo as capable of handling all filament types including TPU, stays identical to the other two models in the lineup despite the larger footprint.
What the bundle includes or not
Elegoo highlights a removable 4.3-inch capacitive touchscreen, usable handheld or mounted to the base, with a built-in model preview feature. Exact accessories included should be checked on the retailer's listing.
A 420 × 420 mm bed needs more workshop space and a longer heat-up time than a compact footprint, worth planning for before buying if available space is limited.
Alternatives to compare
For a mid-size footprint on the same technical base, the Neptune 3 Plus covers 320 × 320 × 400 mm per Elegoo. For a more compact, easier-to-fit option, the Neptune 3 Pro remains the entry point in the same family.
The beginner's buying guide helps judge whether a footprint this large is worth it given your available space and target projects.
Similar printers to compare
Sources and limits
- Manufacturer documentation reviewed September 12, 2026.
- How we assess specifications
We have not measured noise, real printing speed, accuracy or reliability, so none of these is rated here.