Baratza Ring Burr Holder

Overview

If you've used a Baratza conical burr grinder for a while, then you'll be familiar with the sacrificial ring burr holder (part number SP0101174) cracking and needing replacement. It only costs $5 + shipping or $20 from a local shop, but the replacement process isn't a great feeling.

The original is likely made by injection moulding, so there are a few details that aren't necessary to reproduce when 3D printing.

Print Settings

For best results, print with the wider diameter up top, which is how it's already oriented in the .3mf file.

Smaller layer height for better strength, e.g., 0.15 mm.

Enable supports everywhere. I used the default snug support settings in PrusaSlicer.

Remove supports for inside clips with the corner of a ~3 mm slotted screwdriver.

Filament Type

Used PLA for the first prototype, and it survived a single espresso grind.

Printed with dried Prusament PC Blend on an unenclosed Prusa MK4S, using a 10 mm brim and enabling draft shield. PC doesn't have the dimensional accuracy of PLA, so use as many of the recommended PC settings as practical.

It's a pretty tight fit. To remove the ring burr from the 3D print, I used an arbor press and the original burr holder. Could have also used heat to stretch out the older holder as well. Easy to insert, but harder to remove. In general operation, extracting the burr shouldn't be a problem because you'll typically only do that when it breaks. Will update on durability after using it a while.

For better espresso grinds with Baratza grinder, refer to the following resources:

1. Rearrange washer shims for finer grind size.

2. Adjust calibration screw to shift grinding range.

Created model based on measuring original part and re-adapting design for 3D printing, but copied some measurements against model.