Best Filament for the QIDI Max4
QIDI's largest enclosed CoreXY: a 390 × 390 × 340 mm chamber heated to 65 C, which is the size where ABS shrinkage actually becomes the hard problem.
Specs verified 2026-11 · prices refreshed daily · page updated 6 November 2026
The QIDI Max4 is an enclosed printer with a 390 × 390 × 340 mm build volume and a hotend reaching 370°C. It handles ABS, ASA, PC and nylon, and it runs abrasive carbon- and glass-fibre filament on its stock nozzle. It has an actively heated chamber. Recommended materials: PLA, PLA+, PETG, TPU, PLA-CF, PETG-CF, ABS, ASA, PC, Nylon, CF / GF composites.
The Max4 is QIDI's flagship, shown at Formnext in November 2025, and the filament argument for it is shrinkage arithmetic. ABS pulls in roughly 0.7 to 0.8 percent as it cools, so a 380 mm part loses close to 3 mm across its length. On an open printer that becomes corner lift and a cracked first layer. The Max4 answers with a third-generation 65 C chamber heater, a 390 × 390 mm bed to 120 C with a full-surface silicone heater and insulation, and 340 mm of Z. If your reason for a big printer is large ABS, ASA or PA parts rather than tall PLA models, this is the machine the chamber is paying for.
What the QIDI Max4 prints well
Recommended materials for this printer:
Enclosed and abrasive-ready out of the box, so it handles the full range from PLA to engineering composites, no nozzle swap needed.
Speed and flow are real here and they change nozzle choice. The Max4 runs to 800 mm/s on closed-loop FOC XY motors with 30,000 mm/s² acceleration, and the hotend is rated to 370 C at 40 mm³/s with a ceramic throat to cut clogging. On a 390 mm bed you want a 0.6 mm or 0.8 mm nozzle for most engineering work: fewer, fatter layers means less time for a tall ABS wall to cool unevenly, and the flow rate supports it. The stock 0.4 mm nozzle is bimetal with a hardened steel insert and the gears are hardened steel, so PLA-CF, PETG-CF, PA-CF, ABS-CF, glass-filled and PPS-CF are all on the table from day one.
QIDI Max4 specs that affect filament
Two practical notes. First, filament volume: a bed this size eats spools, and large multi-kilogram prints are routine, so plan on 2 kg or 3 kg per big part and keep matched batches so colour does not shift mid-print. Second, PLA on a warm chamber is the usual trap, which is why QIDI offers the Polar Cooler as an extruder-cooling add-on and fits a top cover with two vent positions. Drying is the one thing the base machine does not do, and with PA, PC and PPS-CF being the Max4's natural materials, the 65 C dry-while-printing in the QIDI Box is worth more here than on any other model in the range.
Filament notes for the QIDI Max4
- The 65 C chamber plus a 390 × 390 mm bed to 120 C is what makes full-bed ABS, ASA and PA parts survive cooling.
- Stock 0.4 mm bimetal nozzle carries a hardened steel insert, so CF, GF and PPS-CF print without a hardware swap.
- Fit a 0.6 mm or 0.8 mm nozzle for large engineering parts and use the 40 mm³/s flow rating properly.
- Open the top cover vents and leave the chamber heater off for PLA, or add the Polar Cooler to stop heat creep.
- Budget 2 kg to 3 kg of filament per full-bed part and keep same-batch spools to avoid a visible colour shift.
- PA, PC and PPS-CF need genuinely dry filament, which only the QIDI Box provides inside this ecosystem.
- Multi-colour needs the QIDI Box, and colour changes on a 390 mm bed add significant purge waste and time.
The deals above are filtered to the materials the QIDI Max4 handles, aggregated from multiple retailers daily and normalised to cost per kg, so the cheapest in-stock option is always on top. Prices refresh every 24 hours and are region-aware, so switch your region in the nav. Click through to the retailer to confirm the live checkout price.
Frequently Asked Questions
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