Single dosing on the WPM ZD-17 and Sunbeam EM0700

Both of these are conical burr grinders aimed at home and light commercial use. The ZD-17 is sold by WPM under the Welhome name in some markets, in several variants — the ZD-17W offers around 30 grind settings, and the ZD-17OD is the on-demand version. The Sunbeam EM0700 uses a belt drive with dual bearings, a design intended to limit movement of the conical burrs while grinding.

We have not printed a burr diameter here. Retailers list the ZD-17 as both 38 mm and 40 mm, and we are not going to pick whichever number suits us better — check your own machine’s documentation if the exact figure matters.

Why swap the hopper

Conical burr grinders at this size tend to be used across several coffees, and the stock hopper holds far more than one dose. This bellows hopper replaces it so you weigh in exactly what you plan to grind.

After grinding, pressing the silicone bellows pushes grounds out of the burr chamber and chute. On smaller grinders that carry-over is a noticeable share of an espresso dose, and it is also the reason a new coffee can taste like the last one for the first shot or two.

Version 3

Every unit we ship today is Version 3. The bellows is a custom branded, factory moulded silicone part — it is no longer 3D printed, as our earlier versions were.

How it is made

• 3D printed: lid, lid lock ring, connector, air-leak prevention gasket
• Factory machine moulded: silicone bellows

Materials

• Lid, lock ring, connector: PLA hard plastic — material info
• Air-leak prevention gasket: TPU — material info
• Bellows: factory moulded silicone

Fitting

This hopper is made for the grinder named on this page. Fit tolerances vary between units and production runs, so minor adjustment may be needed to seat it perfectly on your grinder. Every unit is covered by our 2 year warranty.