# Breville 58mm Portafilter Assembly (SP0001817)

> Espresso compatibility data from EspressoFit. Confidence: **manufacturer (Tier 1 — manufacturer primary source read firsthand)**.
> Sources last read firsthand: 2026-08-26.
> Canonical page: https://espressofit.com/parts/breville-58mm-portafilter/

## Specifications

- **Part type:** Portafilter
- **Size standard:** 58 mm
- **Brand:** Breville

## Fits these machines

- Breville Dual Boiler (58mm portafilter) — https://espressofit.com/machines/breville-dual-boiler/
- Breville Oracle (58mm portafilter) — https://espressofit.com/machines/breville-oracle/
- Breville Oracle Dual Boiler (58mm portafilter) — https://espressofit.com/machines/breville-oracle-dual-boiler/
- Breville Oracle Jet (58mm portafilter) — https://espressofit.com/machines/breville-oracle-jet/
- Breville Oracle Touch (58mm portafilter) — https://espressofit.com/machines/breville-oracle-touch/

## Notes

Breville's own **58mm portafilter assembly** — the replacement handle-and-basket
holder for its 58mm machines, as distinct from the
[54mm assembly](/parts/breville-54mm-portafilter/) that fits the Barista and
Bambino line.

## Which Brevilles this is for

Breville sells two portafilter formats and they do not interchange. This is the
58mm one: the Oracle line and the Dual Boiler. If you have a Barista Express,
Bambino, Pro or Touch, you need the 54mm assembly instead — see
[Breville 54mm vs 58mm](/guides/breville-54mm-vs-58mm/), which is the single
most common fitment mistake on this brand.

Breville names only **the Oracle Jet (BES985)** on the part page itself, in its
"Works With" block. The other four machines listed below are cross-referenced on
the strength of their own Breville product pages, each of which states a 58mm
portafilter. That is the same basis used for Breville's other 58mm parts here.

## A portafilter is not just a diameter

Worth saying plainly, because it is the one place this database cannot give you
a complete answer. A basket is decided by diameter; a **portafilter** also has to
twist and lock into the group, which depends on the ear or lug spacing — and
essentially no manufacturer publishes that figure, Breville included.

Within one maker's own line that is not usually a problem: Breville's 58mm
machines share a group, and Breville sells one 58mm assembly for them. Across
makers it very much is, which is why you should not assume this fits a
non-Breville 58mm machine just because the number matches. See
[why "58mm" isn't one standard](/guides/58mm-is-not-one-standard/).

## Sources

- https://www.breville.com/us/en/parts-accessories/parts/sp0001817.html
  - Official Breville (US) replacement-part page, read firsthand 2026-08-26. Product name verbatim: 'Portafilter Assembly 58mm', described as 'Portafilter Assembly 58mm for selected Breville Espresso Machines.' The page's own 'Works With' block names one model explicitly — 'the Oracle® Jet - BES985'. Breville does not enumerate the rest on the part page, so the remaining cross-references below come from each machine's own official product page, all of which state a 58mm portafilter.
- https://www.breville.com/en-us/product/bes920
  - Official Dual Boiler BES920 page, read firsthand 2026-07-13: states a '58mm' portafilter, which is the basis for cross-referencing this assembly to the Dual Boiler alongside the Oracle line.

---

Compatibility reference, not a substitute for your machine's manual. Every claim above cites the source it came from; see https://espressofit.com/methodology/ for how entries are verified. Corrections: corrections@espressofit.com.