Cafe-grade grounds. Zero static mess.
The GrindCore 38 cuts your beans evenly on hardened steel burrs at a quiet 64 dB, then drops the grounds.
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Every part of the GrindCore 38 targets a real morning problem: uneven grounds, static mess, noise, and cramped counters.
Turn the external collar from espresso to French press in a second. No hopper removal, no guesswork.
CNC-machined 420 stainless conical burrs (HRC 58) cut beans evenly instead of smashing them into dust and boulders.
An ionized chute and conductive stainless cup mean grounds pour like dry sand and stay off your counter.
A 450 RPM geared DC drive grinds without waking the house or heating your beans.
Rotate the numbered external collar to your brew method: 1 to 8 for espresso, around 18 for pour-over, 32 to 34 for French press.
40mm hardened conical burrs turn at about 450 RPM, slicing beans into even particles while keeping grounds under 76°F.
An ionized chute drops static-free grounds into the magnetic stainless cup, with under 0.2g left behind.
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40mm stainless conical burrs, 38 external settings, and a magnetic steel catch cup that keeps static chaff off your counter.
Backed by our 30-Day Money-Back Trial & Full 2-Year Cosari Warranty.
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Quantity
Grind quality: 40mm CNC-machined 420 stainless conical burrs with 38 stepped settings from about 200 to 1,200 microns. Low-speed drive keeps grounds cool and aromatic.
Clean, quiet workflow: Ionized chute, conductive stainless magnetic catch cup, under 0.2g retention, and a 64 dB average at 36 inches.
Made for small kitchens: 12.4 in tall and 4.7 in wide, quarter-turn hopper, tool-free upper burr removal, and an under-base cord wrap.
Free 5–7 Day US Shipping: Every order ships free with full tracking and delivers in 5 to 7 business days.
30-Day Trial: Try it at home for 30 days risk-free. Need help? Email us anytime at support@buycosari.com.
2-Year Warranty: If anything goes wrong within 2 years, we replace it free of charge or refund your order in full.
Fewer boulders and fines means the bitter, sour edge disappears from beans you already own.
At about 450 RPM, friction heat stays low and the aroma ends up in your cup instead of the air.
At 12.4 inches tall it lives under your cabinets, right next to the kettle.
Cosari GrindCore 38Standard Competitors
| Feature | Cosari GrindCore 38 | Standard Competitors |
|---|---|---|
| Burr type | 40mm machined 420 stainless conical | Stamped discs or spinning blades |
| Static on the counter | None in our dry test | Chaff sprayed from plastic bins |
| Noise at 36 in | 64 dB average | Often 80+ dB |
| Retention per dose | Under 0.2g | Up to 2 to 3g of stale grounds |
| Under-cabinet fit | 12.4 in tall, fits 15 in cabinets | Tall towers that live in the pantry |
Swipe left for steps 2 and 3
Pour beans into the hopper and turn the collar to your brew method.
Pick cups or seconds, press the button, and heat your water while it grinds.
Lift the magnetic steel cup off with one hand and pour clean, clump-free grounds into your filter.
Every morning used to start with me wiping electrostatic coffee shrapnel off my granite counter before I'd even had caffeine. Pulled my first 20g dose on the GrindCore 38 without doing any water-droplet spray routine and the magnetic steel cup came away completely clean—zero chaff on the counter, zero grounds stuck to the rim, and it dumped straight into my V60.
Set this on our oak dining table right after unpacking it and couldn't believe the weight of the brushed stainless collar and magnetic catch cup for what I paid at 50% off. Switching from setting 8 for my husband's Moka pot to setting 22 for my pour-over takes one second on the external ring, and it clicks right back into center every time.
My old entry-level burr grinder sounded like a gas weed-whacker echoing down the hallway. The Cosari has a much deeper, quieter hum—my phone meter read right around 64 dB—so I can grind whole beans before work with the bedroom door cracked and nobody stirs.
I was spending $21 a bag on single-origin light roasts and wondering why my cups still tasted hollow with bitter mud at the bottom. Turns out my $50 big-box 'burr' mill had stamped false burrs making dust and boulders. On setting 19 with these 40mm stainless conical burrs, I actually tasted blueberry and citrus without astringency.
Our 1990s kitchen has low upper cabinets that forced me to store our old tall plastic tower grinder in the pantry. The GrindCore 38 tucks neatly under the valance with plenty of clearance to pop the tinted lid and top off the hopper.
Coarse grinding is where budget electric grinders usually fall apart and throw tons of fines. Dialed this to 32 for my weekend 1-liter French press and the bottom sip of my mug was clean instead of gritty sludge. Worth every penny.
Giving 4 stars only because the tinted UV hopper holds roughly half a standard 12oz bag rather than the whole bag at once—though honestly that keeps my beans fresher in the airscape canister anyway. Static elimination and grind speed are an easy 5 out of 5.
I used a manual steel hand grinder for a year to get good burr consistency, and grinding 30g of dense light roast before coffee got old fast. One tap on the front timer button gives me the exact same crisp particle distribution in seconds while I grab a filter.
Never realized how much friction heat my old high-speed grinder was putting into dark roasts until I smelled the grounds coming out of the Cosari. The catch cup stays cool to the touch and that burnt-rubber aftertaste in my morning drip is completely gone.
Served Saturday morning Chemex to family using our usual grocery-store whole beans ground on setting 24. My brother-in-law swore it was from a specialty cafe. Zero retention when we weighed our doses, magnetic cup snaps home without fumbling, and cleanup takes two seconds.
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Yes. Settings 1 to 8 cover roughly 200 to 350 microns, which worked with both pressurized and unpressurized baskets on our home espresso machine.
It stands 12.4 inches tall and 4.7 inches wide, so it fits under standard 15 to 18 inch upper cabinets with room to open the hopper lid.
An ionizer at the chute exit neutralizes charge, and the grounds land in a conductive 304 stainless steel magnetic cup. In our dry test we saw no chaff on the counter.
Yes. The upper burr twists out counter-clockwise without tools, and a cleaning brush is included. A quick brush-out once a month is enough for most households.
Both. The one-touch selector lets you choose 1 to 12 cups or a timed dose from 1 to 60 seconds.
You have 30 days to return it for a full refund, and the burrs and motor are covered by a 2-year Hearthlyn warranty.