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What fits a 51 mm De’Longhi
By Lin · How we pick · Full Fit Finder
De’Longhi uses a 51 mm group that belongs to nobody else. This is the most common way money gets wasted on these machines: the parts you will see everywhere are made for Breville (54 mm) or for prosumer machines (58 mm), and neither will go in. Filter every listing by 51 mm before you look at anything else.
Machines in the 51 mm group
- De’Longhi Dedica / Dedica Arte (EC680 · EC685 · EC885) — The Dedica ships with a pressurised basket, which masks grind quality. Moving to a non-pressurised 51 mm basket is the usual first upgrade — but it only pays off once you have a real grinder.
- De’Longhi Linea Classic (EM450M) — Sold with pressurised baskets. The 51 mm parts that fit the Dedica fit this machine too, but check the listing names your model — De’Longhi uses more than one portafilter format across its range.
Every size for this group
| Part | Size | Why it matters | |
|---|---|---|---|
| Portafilter | 51 mm | De’Longhi uses its own 51 mm size. Neither 54 mm (Breville) nor 58 mm (commercial) parts will fit. | Find one ↗ |
| Filter baskets | 51 mm | ★ The stock basket is pressurised — it forces crema regardless of grind, which hides both good and bad grinding. A non-pressurised 51 mm basket is the standard upgrade, but only makes sense with a real grinder. | Find one ↗ |
| Tamper | 51 mm | Must be 51 mm. The plastic scoop-tamper in the box is the single biggest limiter on this machine. | Find one ↗ |
| Dosing funnel | 51 mm | Sits on the portafilter rim so grounds do not spill. | Find one ↗ |
| Puck screen | 51 mm | Sits on top of the puck. Sold for the Dedica in 51 mm, typically around 150 µm mesh. | Find one ↗ |
| Distribution / leveller | 51 mm | Levels the grounds before tamping. Adjustable-depth versions let you match the shallow 51 mm basket. | Find one ↗ |
| WDT tool | Universal | Needles break up clumps. Not size-specific — and it matters more here than on any other machine, because the basket is small. | Find one ↗ |
| Knock box | Universal | Not size-specific. | Find one ↗ |
| Scale | Slim preferred | The Dedica is very narrow with little clearance under the spouts — a slim scale fits best. | Find one ↗ |
De’Longhi’s 51 mm is its own ecosystem. Parts sold for Breville (54 mm) or prosumer machines (58 mm) will not fit, so filter every listing by 51 mm.
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