Normcore 54mm to 45.5mm Step-Down Portafilter Basket Kit

Set your 54mm espresso machine free. Swap your standard 54mm basket for this stepped-down 45.5 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 54mm 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 45.5mm 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.

Standard Flow = High-Flow = 0.28 mm Hole Diameter, 786 holes
Requires a finer grind, flows faster, yields higher clarity; better for light/medium roasts.

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.

Compatibility Reminder：
- Bottomless-only fit (54mm); 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: With Normcore spring-loaded tamper, use 45.5mm base only (a 53.3mm tamper will not fit this basket) If you are using the Normcore 53.3mm spring-loaded tamper, you may purchase a 45.5mm 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 - 45.5mm Dosing funnel
1 - 45.5mm 0.8mm Puck Screen
1 - Spring for the 54-45.5 Basket
200 - 45.5mm Filter paper