Normcore 58mm to 49mm Step-Down Portafilter Basket Kit

Set your 58 mm espresso machine free. Swap your standard 58 mm basket for this stepped-down 49 mm basket and unlock a different extraction style without rebuilding your setup.

The tapered interior promotes a gentler, more forgiving flow profile that’s especially friendly to lighter roasts and imperfect puck prep. Laser-perforated holes deliver repeatable water distribution for cleaner, more even shots.

This basket is deeper than typical 58 mm baskets and is therefore compatible with bottomless/naked portafilters only. To speed up your first dial-in, we include the accessories you’ll actually need for a complete 49 mm workflow.

Reduced Flow = Low-Flow = 0.18 mm Hole Diameter, 2475 holes
Allows a coarser grind, easier to dial in, produces a thicker texture; better for medium/dark roasts, alternative extraction, experimentation.

Standard Flow = High-Flow = 0.28 mm Hole Diameter, 786 holes
Requires a finer grind, flows faster, yields higher clarity; better for general use, light roasts, standard techniques
Tips: When switching 0.18 → 0.28, adjust the grind finer (usually 1–2 clicks). From 0.28 → 0.18, adjust coarser and monitor pressure/flow while fine-tuning the dose.

Here’s the simple version:
0.18 mm flows slower even with more holes because each hole is smaller and creates more resistance—like many narrow straws vs fewer wider straws.

Wider holes (0.28 mm) let water pass much more easily, so the basket runs faster.

Smaller holes (0.18 mm) hold water back a bit, making shots slower, steadier, and thicker—and they’re also a bit more prone to fines clogging.

So: more holes ≠ faster—bigger holes = faster.

Compatibility Reminder：
- Bottomless-only fit (58 mm); not for spouted/pressurized
- Check headspace with puck screen/spring; reduce dose if tight
- Rinse puck screen & spring after use; dry the basket
- Tamper Note: Please use a 49mm tamper with this basket. (A 49.7mm or 58mm tamper will not fit.) If you are using the Normcore 58.5mm spring-loaded tamper, you may purchase a 49mm base and baffle separately for replacement. 

Note: The CNC option basket is machined from a solid block of 304 stainless steel, so the dosing funnel will not stick magnetically. However, it can still be placed on top to guide coffee grounds into the chamber.

THE SET INCLUDES:
1 - Step-Down Portafilter Basket
1 - 49mm Dosing funnel
1 - 49mm 0.8mm Puck Screen
1 - Spring for the 58-49 Basket
200 - 49mm Filter paper