CASABREWS 51mm Bottomless Portafilter for CM5418/5418Pro/3700Essential — Stainless Steel with Wooden Handle, Double-Shot Basket

CASABREWS 51mm bottomless portafilter is a stainless-steel, 3-ear portafilter with a wooden handle and included double-shot basket and puck screen, made to fit CM5418, 5418Pro and 3700Essential machines for visible, dialable extractions.

Upgrade your home espresso setup with a tool designed for precision and technique. This 51mm bottomless portafilter gives unobstructed visibility of the coffee flow so you can monitor crema, spot channeling, and refine grind and tamping. Constructed from food-grade stainless steel with a polished finish and a comfortable wooden handle, it matches the look and performance of premium café hardware while being sized specifically for CASABREWS machines.

How does a bottomless portafilter help improve my shots?

By removing the spouts, a bottomless portafilter exposes the underside of the puck so you can watch how espresso exits the puck. That visual feedback makes it easy to detect uneven flow, channeling, or tamp inconsistencies and adjust grind or distribution accordingly.

• Instantly see where extractions start and stop, enabling faster technique tweaks.
• Use visual cues to refine grind size, dose, and tamp pressure for more consistent crema.
• Works with the included puck screen to keep the brew head cleaner and improve flow.

Will this portafilter fit my CASABREWS CM5418, 5418Pro or 3700Essential?

This accessory is engineered specifically for 51mm baskets and the group heads used on CASABREWS CM5418, 5418Pro, and 3700Essential machines. The 3-ear locking design ensures a secure and accurate fit so the seal, pressure, and alignment remain consistent with factory parts.

• 51mm diameter matches the machine's double-shot baskets for leak-free locking.
• Three-ear lug design mirrors OEM portafilters for reliable engagement.
• Comes with a double shot filter basket sized for standard 16g dosing.

What materials and features affect handling and longevity?

The portafilter body is machined from food-grade stainless steel and hand-polished to resist corrosion and staining. A solid wood handle provides ergonomic grip and a tactile, high-end feel; its attachment is built for everyday use so leverage while locking and knocking out spent puck stays comfortable.

• Food-grade stainless steel resists rust and cleans easily under running water.
• Hand-polished finish gives an attractive, low-maintenance surface.
• Solid wood handle offers secure grip and café-style control when brewing.

How should I use it to get the best results with bottomless shots?

Bottomless portafilters typically require a slightly finer grind and an even tamp to prevent early channeling. Follow a consistent dosing routine — this kit recommends around 16g for a double shot — and use the included puck screen to stabilize the puck and reduce group-head cleaning between shots.

• Recommended double dose: 16g; adjust in 0.1–0.2g increments for dialing in.
• Tamp evenly and check for level puck surface before locking the portafilter in place.
• Use the puck screen to protect the group head and smooth flow.

Who is this for: home baristas and coffee hobbyists who own a CASABREWS CM5418, 5418Pro or 3700Essential and want clearer visual feedback to improve extraction consistency. It suits users ready to experiment with grind size and tamp technique and those who appreciate a durable, attractive tool with café-style ergonomics. If you want to dial in flavors, reduce wasted shots, and learn more about how grind and tamp affect espresso, this portafilter gives practical, everyday diagnostics without requiring commercial equipment.