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Extruder system

Prusa Nextruder: Prusa Nozzle, V6 adapter and printers

Prusa's Nextruder: 10:1 planetary gearbox, the Prusa Nozzle it takes, V6 nozzles only with Prusa's adapter, and the printers Prusa ships it on.

By Watchmarks EditorialUpdated

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Short answer

The Nextruder takes the Prusa Nozzle (including the Prusa Nozzle CHT); E3D V6 nozzles fit only with Prusa's Nextruder V6 Nozzle Adapter. Prusa lists it with a 10:1 planetary gearbox and ships it on the MK4S, MK4, MK3.9, XL and CORE One family. Prusa's MK3/S/+ to MK4S kit adds a Nextruder to an MK3.

What fitsAll 2 items that fit

  • Diamond-tip Nextruder nozzleDiamondBack Prusa Nextruder nozzle, 0.4 mm (polycrystalline diamond tip)0.4 mm, Prusa NextruderCheck price on Amazon

Key facts

Type
Extruder with a 10:1 planetary gearbox[1]
Filament size
Not confirmed
Gear ratio
10:1 planetary gearbox[1]
Published E-steps
Not confirmed
Drive gears
Not confirmedPrusa says the Nextruder primary gear and idler-shaft bearings need no lubricant.
Max temperature
Not confirmedPrusa states maximum nozzle temperatures per printer, not for the Nextruder alone.
Nozzle standard
Prusa Nozzle and Prusa Nozzle CHT; E3D V6 nozzles only with the Nextruder V6 Nozzle Adapter[2][3]Prusa does not confirm that MK8 nozzles work with the adapter. Do not assume any M6 nozzle fits.
Nozzle change
Prusa offers a manual guide or a printable Nozzle Replacement Tool for each model[3]Prusa says all its methods work with both the Prusa Nozzle and the Prusa Nozzle CHT.
Heater
Not confirmed
Printers the maker names
Shipped on the MK4S, MK3.9S, MK4, MK3.9, XL, CORE One/+, CORE One L and Signature Oak; added to the MK3/S/+ by Prusa's MK4S upgrade kit[3][2][4]Prusa's statement covers printers as shipped, not modified units.
Maker flow figure
Not confirmed
Outside measurement
Not confirmed
Where the maker sells
Not confirmed
Not confirmed
Not confirmedPrusa does not confirm it, and one user comment reports leaks.

Watch out for

  • V6 nozzles need Prusa's Nextruder V6 Nozzle Adapter. 'Any M6 nozzle fits' is not something Prusa says.
  • Prusa's V6 nozzle procedure for the MK3S+ (280 °C, 2.5 N·m) does not apply to Nextruder printers.
  • Prusa says not to lubricate the Nextruder primary gear or idler-shaft bearings.

What fits

Product details below are the seller's own description unless a source is shown. Pick the variant named for each item.

  • 0.4

    Spare Nextruder nozzle

    E3D brass Prusa Nextruder nozzle, 0.4 mm (PRUSA‑MK4‑NOZZLE‑AS‑0400)

    Choose the 0.4 mm brass Prusa Nextruder nozzle (PRUSA-MK4-NOZZLE-AS-0400).

    E3D makes this nozzle for Prusa's Nextruder and lists the MK3.9, MK4, MK4S, XL and CORE One. Brass is not for abrasive filaments.

  • 0.4

    Diamond-tip Nextruder nozzle

    DiamondBack Prusa Nextruder nozzle, 0.4 mm (polycrystalline diamond tip)

    Choose the 0.4 mm DiamondBack Prusa Nextruder nozzle.

    Made with E3D; Prusa lists it for Nextruder printers, rates it to 300 °C and says it is not high flow. A premium nozzle for abrasive filaments.

    Check price on Amazon

Questions

Can I use V6 nozzles in a Prusa Nextruder?

Only with Prusa's Nextruder V6 Nozzle Adapter. Prusa does not confirm that MK8 nozzles work with it.[2]

Which printers have the Nextruder?

Prusa says the MK4S, MK3.9S, MK4, MK3.9, XL, CORE One/+, CORE One L and Signature Oak ship with the Prusa Nozzle, and groups them as Nextruder printers. Its MK3/S/+ to MK4S kit adds a Nextruder to an MK3.[3][2][4]

Sources

  1. Original Prusa MK4S 3D Printer · Prusa Research · MK4S technical parameters. · checked 8 Oct 2026
  2. Different nozzle types · Prusa Research · Prusa nozzle systems by printer model; V6 adapter. · checked 8 Oct 2026
  3. Changing or replacing the Prusa Nozzle · Prusa Research · Which shipped Prusa printers use the Prusa Nozzle; replacement methods. · checked 8 Oct 2026
  4. Original Prusa i3 MK3/S/+ to MK4S upgrade kit · Prusa Research · Kit contents, reused parts and starting-configuration requirements. · checked 8 Oct 2026
  5. Regular printer maintenance (MK4/S, MK3.9/S) · Prusa Research · MK4, MK4S, MK3.9, MK3.9S maintenance intervals and lubrication. · checked 8 Oct 2026
  6. Changing or replacing the nozzle (MK2.5/S, MK3/S/+, MK3.5/S) · Prusa Research · E3D V6 nozzle change on MK2.5/MK3/MK3.5 families. · checked 8 Oct 2026

Next review due 7 Jan 2027.