58mm Pietro Pro burrs
The highly-regarded Pietro flat burr set, now grinding inside a compact A2 — grinder and burrs supplied separately.
Fotos
Duerlis × LeBrew FEMOBOOK A2 × Pietro Mod Kit
- Precio habitual
- $119.00
- Precio de oferta
- $119.00
- Precio habitual
-
- Precio unitario
- por
Pre-order
Pay in full at checkout. Estimated to begin shipping around December 7, 2026. FEMOBOOK A2 grinder and both burrs are sold separately.
Cantidad
Compatibility
In the box
DUERLIS × LEBREW
FEMOBOOK A2 × Pietro Mod Kit
A precision metal modification that turns your Femobook A2 into a slow-fed 58mm flat-burr grinder, powered by Pietro Pro burrs. Designed by Duerlis. Manufactured by LeBrew. Adapter kit only — Femobook A2 grinder and Pietro burrs are not included.
VIDEO REVIEW
The A2 mod in action
Lance Hedrick takes a closer look at the FEMOBOOK A2 × Pietro setup.
Pietro Pro burrs. A different daily workflow.
Explore the Pietro Pro flavor profile with motorized grinding, a tilted setup and a hands-on clearing routine.
18.75 µm per click
Fine, repeatable adjustment using the A2's own click mechanism — start at 34 clicks from burr lock, then dial in to taste.
45° tilt workstation
Use the tilt stand: angled bean delivery helps prevent regrinding, so the grind stays cleaner.
No RDT
Don't mist the beans — moistened beans stick to the inner walls of the A2. Keep it dry.
CNC aluminum adapter
CNC-machined aluminum components house the burrs and support the assembly.
Low-fines flavor profile
Lance Hedrick described clarity, juiciness and sweetness with a rounded body. Results depend on coffee, settings and brewing.
Designed around your A2
A compact flat-burr conversion
The CNC-machined aluminum adapter pairs your Femobook A2 with 58mm Pietro Pro burrs for motorized flat-burr grinding. Grinder and burrs are sold separately.
- Reuses your A2 — the click system and axle are exactly what the mod builds on
- Purpose-built for the 58mm Pietro Pro burr set
- 3D-printed stand files are free to download (both versions on MakerWorld)
Inside the adapter
Every part has its place
CNC-machined components bring the housing, burr carriers and adjustment system together in a compact metal adapter.
In the box
- Top bearing
- Main housing
- Bottom bearing
- Feeder plate
- Rotating burr carrier
- Catch cup
Assembly illustration. The grinder, both burrs and printed stand are not included.
Made for two kinds of people
Whether you already own the burrs, or already own the grinder — both roads lead here.
Have a Pietro?
Love the Pro burr flavor but hate the cranking? Drop your burrs into this mod and let the A2's motor do the work. Your Pietro body can finally sit aside.
Have an A2?
Want to play with flat burrs on your favorite travel grinder? This is the flat-burr upgrade path for this adapter and a separately sourced 58mm Pietro Pro burr set.
The grinding experience
Slow-fed, low-RPM flat burrs — different rhythm, rewarding results.
Slow & steady
In Lance Hedrick’s test, a 15g dose took over a minute at approximately 60 rpm — plenty of time to heat water and prep your brewer.
Shake & tap
Low RPM means some retention — give it a shake and a few taps before you're done to clear the last grounds.
Tilt for dense roasts
Ultra-light, super-dense beans can stall on fine settings — tilting and restarting helped in the reviewer’s tests; results vary with beans and settings.
Brew with confidence
Grounds may look unusual — that's expected and consistent. Trust the cup: judge your dial-in by the brewed coffee.
Stock A2 vs A2 × Pietro Mod Kit
| Feature | Stock Femobook A2 | A2 × Pietro Mod Kit |
|---|---|---|
| Burr type | Hexagonal stock burr | Pietro 58mm flat burrs (Pro) |
| Adjustment | Click system | Click system (kept) |
| Per-click movement | — | 18.75 µm |
| Flavor profile | Clean, light-roast friendly | Clarity + juiciness + high sweetness |
| Conversion adapter | Not required | CNC aluminum metal kit |
| Recommended angle | — | 45° tilt (helps prevent regrinding) |
| Burr compatibility | Stock only | Pietro burrs only (58mm) |
Technical specifications
At a glance
- Product
- Femobook A2 × Pietro Mod — metal adapter kit
- Compatibility
- Femobook A2 + 58mm Pietro Pro burrs only
- Not included
- Femobook A2 grinder, Pietro burrs, 3D printer/filament
FAQ
Does the kit include a grinder?
The kit includes the upper and lower bearings, main housing, feeder plate, rotating burr carrier and catch cup. Supply your own FEMOBOOK A2 and 58 mm Pietro Pro burr set. The stand files are available as a separate free download.
Which burrs does it support?
Pietro burrs only — the 58mm Pietro Pro flat burr set. 64mm burrs and other brands' burrs are not supported.
Do I need to use the 45° stand?
It's strongly preferred: the tilted workflow helps prevent regrinding. Both stand versions are free 3D-print files on MakerWorld.
Why no RDT?
Moistened beans stick to the inner walls of the Femobook A2. Grind dry — it's part of what makes this setup work.
Where do I start with grind settings?
Start at 34 clicks from burr lock and adjust from there. Each click moves the burrs 18.75 µm. Fine settings can increase motor load; this is not a guarantee of espresso performance.
Is it slow to grind?
Yes by design — roughly a minute for 15g at ~60 rpm, because it's a slow-fed flat burr setup. Shake and tap to clear retention. Timing varies with roast, grind setting and feeding.
Can it stall?
Very light, dense beans at fine settings can stall. Tilting and restarting helped in Lance Hedrick’s tests. Do not assume every coffee or setting will work equally well.
What should I know about the magnetic cup?
The reviewed version had limited magnetic holding force, especially with grounds between the contact surfaces. Keep those surfaces clean and check the cup is secure before grinding.
How do I check pricing and availability?
See the purchase section above for current pricing, availability and pre-order shipping information.
DIY BUILD
Build your own A2 mod
Making your own FEMOBOOK A2 × Pietro mod? Use Duerlis’s free MakerWorld files to 3D-print a 45° stand for your build. Choose the standard or lightweight version.
