Before you order
Bambino and several Barista machines use the 54 mm family, while the Oracle Jet uses 58 mm. Diameter alone does not confirm fit: third-party lug geometry and grinder-cradle clearance can still differ.
Compatibility ledger
MODEL-SPECIFIC| Item or model | Fits | Verdict | Research note |
|---|---|---|---|
| Bambino BES450 | 54 mm accessory family | Fits | Breville’s US specification identifies a 54 mm portafilter. |
| Barista Express BES870 | 54 mm accessory family | Fits | The official product page and dosing-funnel page confirm the 54 mm family. |
| Barista Express Impress BES876 | 54 mm accessory family | Fits | Check assisted-tamping clearance for accessories used in the cradle. |
| Barista Pro BES878 / Barista Touch BES880 | 54 mm accessory family | Fits | Breville explicitly names both models on its 54 mm dosing-funnel page. |
| Oracle Jet BES985 | 58 mm accessory family | Fits | The current US manual specifies a 58 mm stainless steel portafilter. |
Diameter is the first filter
Never buy a 58 mm accessory for a 54 mm machine or the reverse. Then verify that the third-party listing names your exact BES model, especially for bottomless portafilters and dosing funnels.
Cradle fit can be narrower than group-head fit
An accessory may lock into the group head yet interfere with an integrated grinder or assisted-tamping system. Prefer listings that explicitly name the machine when the accessory is used in the cradle.
What we do not claim
This is a research-based specification guide. It does not certify every third-party portafilter, basket, tamper or funnel sold under a generic diameter label.
PRIMARY SOURCES