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KINGrinder K4 & K6, the Kings of Value for Money

CoffeeGeek
CoffeeGeekCoffee EnthusiastUpdated on February 23, 2026Published on November 17, 2023

Explore how grind size influences your coffee's flavor and discover KINGrinder grinders, ideal for espresso lovers and gentle brew methods. This article presents in detail the K4 and K6 models, designed to offer precise adjustment and optimal performance. Check out our comparison to find the grinder that perfectly matches your coffee preferences!

The KINGrinder grinder range

The KINGrinder range includes 7 models (K0 to K6), each adapted to specific methods: espresso, gentle methods or versatile use. This allows every coffee enthusiast to find the grinder that suits their needs.

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The Kingrinder K4 is no longer in production. From now on, the brand only sells the K6, which remains the most versatile in the range.

View the KINGrinder coffee grinder range on Amazon

The KINGrinder K4 and K6

For our tests, two models stand out:

  • The Kingrinder K4, espresso-oriented
  • The Kingrinder K6, more versatile

Visually, they are identical and it is impossible to tell them apart from the outside.

Common features:

  • Unibody aluminum design
  • External adjustment with 60 clicks per rotation
  • 48 mm stainless steel conical burrs
  • 16μm adjustment per click
  • Compatibility with a drill for effortless grinding
  • Double ball bearing for consistent grinding

Differences Between KINGrinder K4 and K6

The distinction is in the burrs:

  • K4: stainless steel conical burrs with titanium plating
  • K6: heptagonal stainless steel conical burrs

The K4 is ideal for espresso, fast and precise.
The K6 is more versatile, performing well on espresso as well as pour-over methods.

Testing the KINGrinder K4 and K6

We tested both models under different conditions.

Handling

  • Robust aluminum body with anti-slip rubber grip
  • 60-notch adjustment ring, easy to manipulate
  • Threaded container with large thread pitch, solid and durable

The Crank

  • Attached to a plastic cap that allows closing the grinder
  • Ergonomic wooden handle
  • Special feature: detachable cap for use with a drill

The Container

  • Metal container that is heavy and stable (unlike the lightweight plastic of the Kinu M47 Phoenix)
  • No internal ridges → prevents ground coffee retention

Disassembly

Disassembly is complete but technical. Less straightforward than a 1Zpresso Jmax, but it allows for thorough cleaning.

Conclusion on the KINGrinder K4 and K6

Kingrinder K6 Grinder
5/5
Excellence in espresso, appreciable versatility in filter.

In 2023, KINGrinder offers the best value for money on the market.

  • The K4 excels in espresso, with impressive speed (20 g in ~35s).
  • The K6 stands out for its versatility, perfect if you alternate between espresso and pour-over methods.

In the cup:

  • The K4 delivers round, syrupy and aromatic espressos.
  • The K6 brings more clarity in pour-over extraction, ideal for V60, Chemex or French Press enthusiasts.

In summary: KINGrinder democratizes high-performance grinders, with refined finishing and efficiency close to models twice as expensive.

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The Kingrinder K4 is no longer produced. The brand now only sells the K6, which remains the most versatile in the range.

Pros
  • Excellent value for money
  • Fast grinding speed (20 g in ~35s)
  • Precise adjustment with 60 clicks per rotation
  • Range versatility (espresso & pour-over methods)
  • Robust unibody aluminum finish
  • Compatible with drill to reduce effort
Cons
  • Disassembly less straightforward than some competitors
  • Slight lack of clarity in filter on the K4
  • Differences between K4 and K6 not visually obvious