Printer model
Prusa CORE One+: specs, rail lubrication and the CORE One upgrade
Prusa's CORE One+ specs: enclosed CoreXY, 250 x 220 x 270 mm, 290 °C, Prusa Nozzle, X-rail lubrication every 3-6 months, and the CORE One+ upgrade.
Also listed as CORE One
Short answer
Prusa lists the CORE One+ as a fully enclosed CoreXY printer with a 250 x 220 x 270 mm build volume, a 290 °C nozzle maximum and a 120 °C bed. It takes the Prusa Nozzle. Prusa says to lubricate the X-axis linear rail every 3-6 months with its rail lubrication set, not Prusa Lubricant. The CORE One and CORE One+ share the same firmware.
Key facts
- Build volume
- 250 x 220 x 270 mm[1]
- Motion system
- CoreXY, fully enclosed[1]Prusa lists a 55 °C maximum chamber temperature. Do not carry MK4 motion or frame parts over to the CORE One.
- Stock extruder
- Not confirmed
- Stock hotend
- Not confirmed
- Nozzle standard
- Prusa Nozzle (Nextruder)[2][3]Prusa says every CORE One/+ it ships comes with the Prusa Nozzle installed or included.
- Stock nozzle
- Not confirmed
- Max nozzle temperature
- 290 °C[1]
- Max bed temperature
- 120 °C[1]
- Firmware
- Same firmware for the CORE One and CORE One+, flashed from a USB drive with the model's own package[4][5]Prusa says Chamber Vent Control requires firmware 6.4.0.
- Latest listed firmware
- Not confirmed
- Power input
- Not confirmedPrusa's PSU 24V 240W assembly is not compatible with the CORE One.
- Hardware revisions
- CORE One and CORE One+ (Prusa titles the latter 'Gen 2')[1][4]Later variants such as the CORE One L are separate models.
- Maker maintenance rules
- Lubricate the X-axis linear rail every 3-6 months with the dedicated rail lubrication set (Microlube GL 261), not Prusa Lubricant; sporadic checks every 200 hours; connector checks every 600-800 hours[6]Prusa's guide has no Z-leadscrew section, so we give no Z-leadscrew lubrication advice for the CORE One.
- Documented upgrade kits
- CORE One to CORE One+ upgrade (Nextruder and top panel, side filament sensor, spool holder); the INDX upgrade works on both[4]From Prusa's blog post dated Jan 16, 2026.
- Recall status
- No recall found on 2026-10-08[7]On 2026-10-08 we found the Bambu Lab A1 recall as the only 3D printer recall in CPSC's notices. That is a dated search, not proof that no recall exists.
- Not confirmed
- Not confirmedPrusa's CORE One maintenance guide mentions Z leadscrews in its summary but has no section on them.
Watch out for
- Use Prusa's rail lubrication set on the X-axis rail, not Prusa Lubricant, per Prusa's CORE One/+ guide.
- The CORE One is CoreXY; MK4 motion and frame parts do not carry over.
- Prusa's CORE One family stops heating and shows a hotend thermal runaway error if the nozzle drops by 12 °C and does not recover within 60 seconds.
- Prusa's PSU 24V 240W assembly is not compatible with the CORE One.
The CORE One shares the firmware, Prusa Nozzle and maintenance guide with the CORE One+. The build volume and temperatures above are Prusa's CORE One+ figures.
Questions
How often should I lubricate the CORE One+ X-axis rail?
Prusa says every 3-6 months with its dedicated rail lubrication set, not Prusa Lubricant. Its guide gives no Z-leadscrew section, so we give no Z-leadscrew advice.[6]
Do the CORE One and CORE One+ use the same firmware?
Yes, Prusa says they share the same firmware. Flash it from a USB drive with the package for your model.[4][5]
What does the CORE One to CORE One+ upgrade change?
Prusa says it covers the Nextruder and top panel, the side filament sensor and the spool holder.[4]