HexAngle Espresso Knock Box (fits Sage/Breville Barista Express)

Overview

A compact, hexagonal espresso knock box designed by hakkaisha for home baristas. It provides above‑average capacity in a space‑efficient footprint, with a shallow angled opening for clean, comfortable knocks and easy emptying. The printed knock bar is designed to be strong and simple to make on common FDM printers.

Design Intent

• Purpose: A robust, easy‑to‑print knock box for discarding espresso pucks after brewing.
• Target users: Home baristas who want a clean, tidy workflow beside their machine.
• Environment: Kitchen countertop; routine, daily use.
• Compatibility: Fits well alongside the Sage The Barista Express (shown), and suitable next to most espresso machines.
• Materials: Prefer ABS/ASA or other higher‑temp materials that tolerate residual heat from fresh pucks.
• Constraints and priorities: Space efficiency (hex footprint), practical capacity, printability, and durability. The shallow angle balances style with function and keeps knocks controlled.
• Trade‑offs: Thicker walls and a solid bar improve strength but add print time and material.

Features

• Hexagonal footprint to sit flush and save counter space.
• Shallow angled opening for comfortable knocking and easy scraping/emptying.
• Strong, easy‑print knock bar geometry focused on durability.
• Above‑average internal volume without a large footprint.
• Clean, minimalist styling to match modern espresso setups.
• Designed to be printed without exotic settings or hardware.
• Optional noise/finish tuning: add a thin TPU/silicone wrap to the bar and felt pads under the base.

Assembly

• Parts: 1× body, 1× knock bar. No hardware required.
• Steps:
  1. Print the body.
  2. Print the bar and insert it into the internal mounts. Ensure a snug, rattle‑free fit.
  3. Optional: wrap the bar with a strip of TPU/silicone for quieter knocks and portafilter protection.
  4. Optional: add rubber/felt feet to protect your countertop.
• Printing tips (safe defaults):
  • Body: print upright; 0.2 mm layer height; 3–5 perimeters; 15–25% infill. Use minimal supports only where overhangs demand (upper lip/interior pockets, if any).
  • Bar: print on its side or flat face for strength; 4–6 perimeters; 40–80% infill.
  • Materials: ABS/ASA recommended; PETG acceptable. PLA may soften if exposed to heat over time.

Safety & Usage Notes

• Knock gently; repeated heavy impacts can damage printed parts over time.
• Fresh pucks can be hot—avoid contact and empty safely.
• Keep away from heating elements/steam wands; high temps may warp low‑temp plastics.
• Not food‑safe; for spent grounds only.
• Small add‑on pieces (feet, wraps) can pose a choking hazard—keep away from children and pets.

If you print this model, please share your make photos  — I’d love to see what you create!

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