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Toolhead Builder

Hotends Overview

The 3D printer hotend is the business end of FDM 3D printers, responsible for melting plastic from a solid to a molten state.

This is a list of popular all-metal hotends compatible with common toolheads for Voron printers, Printers for Ants, and other custom 3D printers. Non-standardized, PTFE lined, or proprietary hotends for prebuilt machines shall typically be excluded unless widely adopted and supported by the community.

Disclaimer: The listed flow rates for the hotends are estimated claims and will vary based on test conditions.

Terminology:

  • Mounting: How the hotend is attached to the toolhead.
  • Length: The total length from the top of the mount to the tip of the nozzle.
  • Flow Rate: The max mm^3/s the hotend can flow without extrusion issues.
  • Melt Zone: The zone from the top of the heaterblock to the tip of the nozzle.
parts lengths

Hotend Types:

  • Standard flow hotends are best suited for slower machines where higher flow hotends may lead to heat creep or are unneccessary. They typically have a max flow rate under 15 mm3/s. Many standard flow hotends can move into the high-flow category with meltzone extensions and CHT/filament split nozzles.
  • High flow hotends are the most common type of hotend used today. They provide a balance of flow rate, standard nozzles, and size. They typically have a max flow rate under 25 mm3/s.
  • Ultra high flow hotends are reserved for the fastest most demanding machines. They offer flow rates in the ranges of 30-50 mm3/s at the cost of heat creep, size, and sometimes non-standard nozzles.