ANYCUBIC Kobra 3 Max Combo 3D Printer,420*420*500mm Mega-Scale Build Volume

Who it suits

The Kobra 3 Max exists for one reason: size. At 420 × 420 × 500 mm, it prints helmets, large props and big enclosures in one piece. For cosplayers and prop makers that can save hours of splitting and gluing. For everyone else, read how big a build volume you need first, because a printer this large has real costs.

Setting it up

It arrives in parts, and the gantry has to be assembled. Reviewers warn that bolts are easy to drop behind the carriage and that some plastic screw holes strip if overtightened, so take it slowly. That costs it 2 points on our ease-of-use checklist, and the optional camera costs another, for a score of 7.

Once built, it levels itself and runs G-sensor vibration compensation, and it connects over Wi-Fi or LAN to Anycubic’s app for remote control and monitoring. The nozzle is a genuine tool-free design: a lever releases it without unplugging the heater or sensor.

Printing with it

Anycubic lists PLA, PETG, ABS and TPU 95A. It is an open-frame printer, so large ABS parts in particular will warp, and PLA and PETG are the realistic choices at this size. Reviewers found bed adhesion a little unreliable, easily fixed with glue stick or a better build plate. See bed adhesion: what actually works. Combo versions add the ACE Pro for multi-colour printing, with the usual purge waste.

Living with it

As a bed-slinger, a 420 mm plate travels a long way, so it needs far more depth than its footprint suggests. Tom’s Hardware notes the firmware is closed, with no access to configuration files. There are no documented recalls or widely confirmed faults, so no deductions, but it has only been on sale since 2025.

Is today’s price a good deal?

Check whether a listing is the printer alone or a Combo with the ACE Pro. If you do not need the size, a 256 mm printer such as the Bambu Lab A1 costs less, takes less room and heats faster. Compare them in our review table.