Behind the update / GU64 Gen1 vs Gen2
The first GU64 had plenty going for it. But after the novelty of a new grinder wears off, the small things start to matter: a bean that hangs up on the way in, grounds collecting where they shouldn't, or a part that's more annoying to remove than it needs to be.
That's the point of the Geimori GU64 Gen2. It's not a completely different grinder, and we're not going to claim it magically makes every coffee taste better. It's a series of practical changes to how coffee gets into the burrs, how grounds leave the machine, and how the grinder holds up to everyday use.
The short answer: Gen2 focuses on six areas: a removable auger handle, a revised auger feed notch, a straighter exit chute, clearer dial alignment, updated motor protection, and a screw-secured rear cover. Most of these changes make grinding and maintenance less fussy rather than changing the grinder's basic identity.
GU64 Gen1 vs Gen2: the changes at a glance
| Area | Gen1 | Gen2 |
|---|---|---|
| Feed auger access | Earlier removal interface | Added grip/handle for easier removal |
| Bean feeding | Earlier auger feed geometry | Enlarged notch gives larger beans more room |
| Grounds exit | Earlier exit path | Reworked, straighter chute for smoother flow |
| Dial reference | Round alignment marker | Vertical ridges make the setting reference easier to spot |
| Motor protection | Earlier control behavior | Updated protective shutoff logic |
| Rear cover | Earlier fastening method | Screw-secured construction |
1. A better grip when it's time to clean the auger
The first change isn't glamorous. Gen2 adds a more usable handle to the feed auger so you can lift it out with a better grip. That's helpful when you're clearing the feed path or doing routine maintenance. You don't need to appreciate the engineering every morning. You just want the part to come out without a fight.
2. More room for larger beans before they reach the burrs
The revised auger has a larger feed notch. In plain English, a bulky bean has more space to enter the feeding path instead of waiting awkwardly above it. The official GU64 page specifically identifies larger, dark-roasted beans as a design target.
That doesn't mean every bean shape or roast will feed identically, but it addresses a familiar kind of annoyance: the grinder is ready, the burrs are turning, and the beans aren't moving along as smoothly as you'd like.
3. The chute matters more than it looks
If you've ever had to tap a grinder, clean a chute, or wonder why the dose out doesn't match the dose in, you know the exit path isn't a minor detail. Gen2 uses a straighter, revised grounds chute. The product documentation also describes a larger exit area and relocated plasma discharge needles, intended to keep grounds from building up around them.
The goal is steadier grounds flow and fewer opportunities for accumulation. It's worth being precise about the claim: a redesigned chute can reduce a clogging risk, but it doesn't guarantee zero clogging or zero retention with every coffee. Roast, humidity, static and cleaning still matter. Our guide to coffee grinder retention explains why some grounds can remain inside even in a single-dose workflow.
There's a trade-off here, too. The Gen2 product FAQ says the knocker was removed to make room for the enlarged exit path. If you liked the physical knocker on the earlier design, that's something to know before you switch.
And because the plasma needles are part of that exit area, keeping them free of grounds still matters. We've covered the mechanism in our GU64 Gen2 plasma anti-static explainer.
4. A dial reference that's easier to line up
Most people don't need a new adjustment system. They need to see where they are on the one they already have. In the video, the Gen1 uses a round reference dot; Gen2 moves to vertical ridges that line up more clearly with the numbered scale.
This is a usability change, not a claim that Gen2 can make finer grind-size steps than Gen1. For the underlying mechanics, see our GU64 adjustment-system breakdown.
5. Motor protection that can stop the grind when needed
The video highlights updated software protection that shuts the motor off if excessive heat builds. Separately, the current GU64 product FAQ describes a protective pause when the driver detects a jam, including a one-minute shutoff. These describe different possible triggers; neither should be read as a guarantee that the grinder can never stall.
It's a sensible direction for a motor-driven device: protect the machine rather than keep forcing it under abnormal conditions. We are not claiming a particular temperature threshold or a quantified reliability improvement here, because the video doesn't provide that test data.
6. A rear cover that's designed to stay put
Finally, Gen2 uses a screw-secured rear cover. It's the sort of change you might never notice when everything is working properly. That's partly the point. The revised fastening is meant to resist loosening over time.
So, does Gen2 make better coffee?
Not necessarily because it's Gen2. A smoother feed path and less buildup may make the routine more consistent, but that isn't the same as a controlled blind tasting or a particle-size comparison of Gen1 and Gen2 with identical burrs, beans, alignment and settings.
If flavor is your main priority, the supported burr configuration matters too. Our GU64 MP vs F burr guide covers the different espresso- and filter-oriented options. Don't confuse a burr choice with a generation change.
Should an existing Gen1 owner upgrade?
Keep your Gen1 if it feeds reliably, your chute stays clean enough, and you're happy with the coffee. You don't need a new machine simply because a newer version exists.
Consider Gen2 if the things that bother you are exactly the ones addressed here: inconsistent bean feeding, frequent chute cleanup, awkward auger removal, or day-to-day maintenance friction. Then the changes aren't cosmetic. They solve a real problem in your routine.
Buying your first GU64? Gen2 is the version designed around the lessons from the original. Check the current product configuration, availability and electrical version before ordering. A model name alone doesn't tell you which burr option is right for your coffee.
Two quick questions
Is the GU64 Gen2 the same grinder as a DF64 Gen2?
No. Those are different product lines from different brands. "Gen2" describes a generation within each line, not a shared set of parts or performance claims.
Can I retrofit every Gen2 improvement onto a Gen1?
Don't assume so. These changes involve physical geometry and control software. Parts compatibility or a supported retrofit would need to be confirmed for your exact unit before purchasing components or attempting a modification.
Editorial note: This article is written by Geimori and is based on our GU64 Gen1/Gen2 comparison video and currently published product information. Engineering changes should not be mistaken for an independent comparative taste test or a guarantee against all jams, static or retention.
