Ultimaker 1.75 mm Nozzle - 0.4 mm Hardened Steel for S3/S5
Ultimaker 1.75 mm Nozzle - 0.4 mm Hardened Steel for S3/S5
Wider 1.75 mm Material Access
Opens the S3 and S5 to the large 1.75 mm filament market, including engineering and composite materials rarely stocked in 2.85 mm, so material choice no longer depends on what the 2.85 mm supply carries.
Hardened Steel 0.4 mm Orifice
A hardened steel 0.4 mm orifice keeps its shape with abrasive composite filament, and the rated 280°C (536°F) limit covers common PLA, PETG, ABS, and ASA profiles.
9 in stock
The Ultimaker 1.75 mm nozzle converts compatible UltiMaker S3 and S5 2.85 mm print cores to use standard 1.75 mm filament. This gives you access to a wider selection of materials instead of limiting your choices to the smaller 2.85 mm filament range. It also lets you explore lower-cost filament options and source materials more easily.
The nozzle features a 0.4 mm hardened steel orifice designed to withstand abrasive composite filament. It is rated to 280°C (536°F), so check your chosen filament's printing requirements against this temperature limit before use.
This drop-in nozzle does not require modification of the print core. If you want to return to the original configuration, you can refit the stock nozzle and restore the printer to its stock setup.
Compatibility is limited to S3 and S5 2.85 mm print cores. Replacing the nozzle alone is not the complete filament conversion: a suitable software profile, PTFE liner, or feeder/Bowden conversion setup is also needed for reliable 1.75 mm filament feeding. Choose the conversion approach that suits your printer setup before printing.
ETA:
- 90-Day Warranty
- 30-Day Return
- 7-Day Delivery

Ultimaker 1.75mm Nozzle Overview
Better Than Generic 1.75mm Nozzles for UltiMaker
Stock UltiMaker 2.85mm nozzles lock you into limited, expensive, and hard-to-source 2.85mm filament. Our Ultimaker 1.75mm nozzle unlocks access to thousands of mainstream, affordable materials with faster availability and greater variety.
While full conversion requires one of three setup methods (covered in our upcoming blog), this nozzle ensures stable, high-quality 1.75mm extrusion once configured — far superior to generic nozzles that cause jamming, oozing, and poor layer quality.
Product Specification
• Product Type: 1.75 mm conversion nozzle for 2.85 mm print cores
• Nozzle Diameter: 0.4 mm
• Nozzle Material: Hardened steel
• Filament Diameter: 1.75 mm
• Compatible Printers: UltiMaker S3, S5
• Print Core: UltiMaker 2.85 mm print cores
• Max Temperature: 280°C (536°F)
• Installation: Drop-in nozzle replacement, no print core modification
Package Includes
1 × Ultimaker 1.75 mm nozzle (0.4 mm, hardened steel)
Not Included: 2.85 mm stock nozzle, print core, filament, and conversion parts for the PTFE liner or feeder setups
Requirements & Installation Notes
- Fit: Replaces the nozzle in UltiMaker S3 and S5 2.85 mm print cores only.
- Conversion: 1.75 mm filament needs one of three setups — software profile change, PTFE inner liner modification, or an advanced feeder/Bowden arrangement
- Reversible: Refit the stock 2.85 mm nozzle to return to the original configuration.
- Temperature: Rated to 280°C (536°F); do not exceed it.
- Geometry: Built for UltiMaker 2.85 mm core length, seating, and flow path, not a standard nozzle drilled out to 1.75 mm.
Explore Precision Upgrades for Your Bambu Lab
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Frequently Asked Questions About Ultimaker 1.75mm Nozzle
How do I use 1.75 mm filament on an UltiMaker S3 or S5?
Two parts. Fit the 1.75 mm nozzle in the 2.85 mm print core so the melt zone and orifice match the smaller filament; the hot end is the part that fails first on a stock core, because 1.75 mm filament can back up out of a 2.85 mm core. Then set the filament diameter to 1.75 mm in the Cura printer or extruder settings and turn off the flow sensor in the printer menu, which otherwise reports a material error on thinner filament. Adjust feeder tension if the filament slips.
Do I need to modify the print core or the feeder?
The S3 and S5 feeders grip 1.75 mm filament without modification. On the core side this nozzle is the drop-in part; if you keep a stock nozzle, the usual community workaround is a short piece of 4 mm OD x 2 mm ID PTFE or PFA tubing pushed into the core. Expect to fine-tune print speed and retraction either way.
Why does the printer report a material error or out of filament?
The flow sensor reads less pressure from 1.75 mm filament than from 2.85 mm. Turn the sensor off in the printer settings and the print continues normally. A firmware update can switch it back on, so check the setting again after updating.
Can I print 1.75 mm and 2.85 mm filament at the same time?
Community reports are mixed. The left core converts more easily than the right one, and a mixed setup usually needs extra parts, such as a 4 mm OD x 2 mm ID spring that lets the inner Bowden move with the right core. Converting both cores is the simpler and more predictable route.
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Ultimaker 1.75 mm Nozzle - 0.4 mm Hardened Steel for S3/S5