Single Dose Coffee Grinder,Wirsh Geimori GU38 Coffee Grinder with 38mm 6-Core Stainless Steel Conical Burr, 0.01mm Stepless Adjustment, Low Retention Espresso Grinder with Magnetic Dosing Cup,Upgrade

Product description

The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. Geimori GU38 Coffee Grinder in Action Merchant Video

How do I achieve “Zero Retention”?

The straight-through design minimizes retention naturally. For the best results, we recommend two simple pro tips: 1) Use the “RDT” to eliminate static, and 2) Press the hopper bellows at the end of the grind to purge any remaining particles.

Is the stepless adjustment difficult for beginners to dial in?

The GU38 offers 0.01mm professional precision, which allows you to find the exact “sweet spot” for espresso that stepped grinders often miss. While there is a slight learning curve to find your perfect setting, the reward is superior flavor clarity.

How consistent is the grind？

Thanks to the 38mm 6-Core CNC Stainless Steel Burrs (HRC58), it delivers pro-level particle distribution comparable to much pricier units. The high-nitrogen steel burrs stay sharp for years, delivering uniform grounds from espresso to French press.

Can the GU38 grind fine enough for professional espresso machines?

Yes. Its 0.01mm stepless adjustment offers the extreme precision required for professional espresso. The 38mm 6-core CNC burrs produce highly uniform fine grounds, ensuring ideal resistance for perfect 9-bar extraction and rich crema.

Do I need tools to clean the grinder?

No tools needed. The tool-free design allows you to access the burrs in seconds for deep cleaning. We include a professional brush to remove residue and prevent flavor cross-contamination, keeping your grinder pristine.

Explore Wirsh Home Barista Series

Customer Reviews

4.4 out of 5 stars 2,419

4.3 out of 5 stars 340

4.3 out of 5 stars 340

4.2 out of 5 stars 4,489

Price

$169.99$169.99

$159.99$159.99

$99.99$99.99

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Color

Black

Black

Black

Black/Stainless Steel

Materials

Stainless Steel/Aluminum

Stainless Steel/Aluminum

Stainless Steel/Aluminum

Stainless Steel (SUS 304)

Product Dimension

3.5″L x 6.3″W x 12″H

3.9″L x 2.6″W x 7.3″H

7.3″L x 3.9″W x 2.6″H

12.5″D x 6.5″W x 11.9″

Human Interface Input

Physical Buttons

Physical Buttons

Physical Buttons

Touch Buttons

Giftable

✔

✔

✔

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【Versatile Precision from Espresso to French Press】 Achieve the perfect extraction for any brewing method. With 65 stepless settings and 0.01mm micro-adjustments, this burr coffee grinder gives you absolute control—from rich, syrupy espresso to clean, bright French press and pour-over.
【Zero Retention for Maximum Freshness】 Stop wasting premium beans. Designed for single-dose enthusiasts, the GU38 features an ultra-low retention design (<0.1g with bellows). Every grind is as fresh as the last, ensuring no stale grounds contaminate your next specialty cup.
【Professional 6-Core Conical Burr】 Equipped with a 38mm 6-core CNC SUS420 high-nitrogen stainless steel burr (HRC58). This high-hardness core ensures consistent particle size distribution, reducing fines and bitterness for café-quality results in your home kitchen.
【Whisper-Quiet Morning Ritual】 Grind without waking the house. Powered by a high-efficiency 96W DC motor running at a steady 190 RPM, the GU38 operates at a low decibel level. It delivers smooth, powerful grinding while maintaining a peaceful environment for your early morning coffee.
【Premium All-Metal Build & Easy Clean】 Built to last with a sleek, plastic-free aluminum body and elegant wood accents. The magnetic dosing cup auto-aligns for a mess-free experience, while the removable burr set and included brush make deep cleaning fast and simple.
【Worry-Free Shopping】All wirsh products including this coffee grinder are safety approved to verify you’re protected. All coffee contact parts are BAP free. We also provide 7×24 hours customer service with 1 years hassle-free replacement warranty, your shopping is solid guaranteed.