{
  "opening": "3DXTech's ThermaX PEEK page, read 27 October 2026, says to plan on a hot end of 360–450 °C (680–842 °F), a bed of 120–160 °C (248–320 °F), and a heated chamber of 70–150 °C (158–302 °F). The settings block on that same page lists an extruder of 400–480 °C (752–896 °F), a bed of 140–180 °C (284–356 °F), and drying at 120 °C (248 °F) for 4 hours. Those two blocks disagree. A printer is treated as able to hold them only when that printer's maker says so.",
  "question": "Can a hobby printer print PEEK or PEI (Ultem)?",
  "slug": "peek",
  "useCase": "heat-resistance",
  "useCaseLabel": "Heat resistance",
  "updated": "2026-10-27",
  "shortAnswer": "3DXTech's ThermaX PEEK page, read 27 October 2026, says to plan on a hot end of 360–450 °C (680–842 °F), a bed of 120–160 °C (248–320 °F), and a heated chamber of 70–150 °C (158–302 °F). The settings block on that same page lists an extruder of 400–480 °C (752–896 °F), a bed of 140–180 °C (284–356 °F), and drying at 120 °C (248 °F) for 4 hours. Those two blocks disagree. A printer is treated as able to hold them only when that printer's maker says so.",
  "recommendedMaterials": [
    "peek",
    "pei"
  ],
  "printerConsiderations": [
    "The PEEK page's prose and its settings chips are both 3DXTech's, and they do not match. Keep the hot end, the bed, and the chamber with the block you are following.",
    "3DXTech writes that most standard desktop printers cannot reliably maintain the conditions in the prose paragraph. That sentence does not name a model. Voron's sourcing page does name Voron, and only Voron, as not designed for PEEK or PEI.",
    "Polycarbonate and nylon are the lower-temperature engineering filaments on [PC](/answers/pc) and [nylon](/answers/nylon). [Heat resistance](/answers/heat) is the general page. [Open printers](/answers/open-printer) is a different class of machine."
  ],
  "pros": [
    "Every PEEK temperature is copied from one 3DXTech page read on 27 October 2026, including the block that conflicts with the paragraph above it.",
    "PEI temperatures stay on the catalog rows they belong to, and Ultem is not given the PEEK chamber."
  ],
  "cons": [
    "The catalog nozzle for ThermaX PEEK is 360–420 °C (680–788 °F). The page's prose says 360–450 °C (680–842 °F). The chips say 400–480 °C (752–896 °F). Nothing here averages them.",
    "A comment about a Prusa HT90 and PEKK-A is a comment. It is not a Prusa specification."
  ],
  "community": "One comment says few people in that forum are printing PEEK. Another calls a PEEK benchy expensive. A third says PEKK-A-CF gears were seen on a Core One L, that PEKK-A is not PEKK, and that those prints need the HT90. The HT90 line is the comment, not a Prusa specification table.",
  "related": [
    "pc",
    "nylon",
    "heat",
    "open-printer"
  ],
  "faq": [
    {
      "q": "Can a hobby printer print PEEK or PEI (Ultem)?",
      "a": "3DXTech's ThermaX PEEK page, read 27 October 2026, says to plan on a hot end of 360–450 °C (680–842 °F), a bed of 120–160 °C (248–320 °F), and a heated chamber of 70–150 °C (158–302 °F). The settings block on that same page lists an extruder of 400–480 °C (752–896 °F), a bed of 140–180 °C (284–356 °F), and drying at 120 °C (248 °F) for 4 hours. Those two blocks disagree. A printer is treated as able to hold them only when that printer's maker says so."
    },
    {
      "q": "Which PEEK temperatures should I load?",
      "a": "The block on the spool's page, and only one block. On the ThermaX page read 27 October 2026 the prose says 360–450 °C (680–842 °F), a bed of 120–160 °C (248–320 °F), and a chamber of 70–150 °C (158–302 °F). The chips say an extruder of 400–480 °C (752–896 °F) and a bed of 140–180 °C (284–356 °F). The catalog cell is 360–420 °C (680–788 °F) and 120–160 °C (248–320 °F) with no chamber. [PC](/answers/pc), [nylon](/answers/nylon), [heat](/answers/heat), and [open printers](/answers/open-printer) are the lower-temperature alternatives."
    },
    {
      "q": "Does Ultem use the PEEK chamber?",
      "a": "The PEEK page does not say so. It says Ultem, a PEI trade name, usually prints more predictably, and it stops there. Prusament PEI in the catalog is 400–420 °C (752–788 °F) and a bed of 140–160 °C (284–320 °F). ThermaX PEI in the catalog is 340–380 °C (644–716 °F) and a bed of 120–160 °C (248–320 °F). No chamber from a PEI datasheet is added on top."
    }
  ],
  "sources": [
    {
      "title": "3DXTech ThermaX PEEK product page",
      "url": "https://www.3dxtech.com/products/thermax-peek-1",
      "kind": "manufacturer"
    },
    {
      "title": "Open Filament Database record for Prusament PEI",
      "url": "https://api.openfilamentdatabase.org/api/v1/brands/prusament/materials/PEI/filaments/pei/index.json",
      "kind": "other"
    },
    {
      "title": "Voron sourcing guide, exotic materials",
      "url": "https://docs.vorondesign.com/sourcing.html",
      "kind": "manufacturer"
    },
    {
      "title": "Community source, r/FixMyPrint 17qmjvr",
      "url": "https://www.reddit.com/r/FixMyPrint/comments/17qmjvr/",
      "kind": "reddit"
    },
    {
      "title": "Community source, r/prusa3d 1p72njr",
      "url": "https://www.reddit.com/r/prusa3d/comments/1p72njr/",
      "kind": "reddit"
    },
    {
      "title": "Community source, r/3Dprinting t9dhfm",
      "url": "https://www.reddit.com/r/3Dprinting/comments/t9dhfm/",
      "kind": "reddit"
    },
    {
      "title": "Community source, r/prusa3d 1wn3k9n",
      "url": "https://www.reddit.com/r/prusa3d/comments/1wn3k9n/",
      "kind": "reddit"
    },
    {
      "title": "Community source, r/3Dprinting x1dtpb",
      "url": "https://www.reddit.com/r/3Dprinting/comments/x1dtpb/",
      "kind": "reddit"
    }
  ],
  "recommendations": [
    {
      "rank": 1,
      "note": "Product page read 27 October 2026 has two temperature blocks, quoted in the answer. The catalog, Open Filament Database verified 13 October 2026, stores a nozzle of 360–420 °C (680–788 °F) and a bed of 120–160 °C (248–320 °F), and stores no chamber. Glass transition on the page is 143 °C (289 °F), melt temperature is 343 °C (649 °F), and the continuous-use line is 240–260 °C (464–500 °F).",
      "brand": "3DXTech",
      "product": "PEEK",
      "material": "PEEK",
      "url": "/brand/3dxtech/peek",
      "nozzle": "360–420 °C (680–788 °F)",
      "bed": "120–160 °C (248–320 °F)",
      "pricePerKg": null,
      "datasheetUrl": null,
      "affiliateUrl": null
    },
    {
      "rank": 2,
      "note": "Catalog nozzle 400–420 °C (752–788 °F) and bed 140–160 °C (284–320 °F), Open Filament Database, verified 13 October 2026. No chamber requirement from a Prusa product page was checked for this row, so none is stated. PEI is the polymer. Ultem is a PEI trade name.",
      "brand": "Prusament",
      "product": "PEI",
      "material": "PEI",
      "url": "/brand/prusament/pei",
      "nozzle": "400–420 °C (752–788 °F)",
      "bed": "140–160 °C (284–320 °F)",
      "pricePerKg": null,
      "datasheetUrl": null,
      "affiliateUrl": null
    },
    {
      "rank": 3,
      "note": "Catalog nozzle 340–380 °C (644–716 °F) and bed 120–160 °C (248–320 °F), Open Filament Database, verified 13 October 2026. The ThermaX PEEK page says Ultem usually prints more predictably than PEEK and gives no Ultem nozzle, bed, or chamber on that page. These catalog temperatures are not that sentence.",
      "brand": "3DXTech",
      "product": "Thermax PEI",
      "material": "PEI",
      "url": "/brand/3dxtech/thermax-pei",
      "nozzle": "340–380 °C (644–716 °F)",
      "bed": "120–160 °C (248–320 °F)",
      "pricePerKg": null,
      "datasheetUrl": null,
      "affiliateUrl": null
    }
  ]
}