Clean Tutorial for 1Zpresso External Adjustment Grinder

This tutorial is for the J-Max S K-Max K-Plus K-Pro K-Ultra X-Pro S X-Ultra ZP6 Special grinder

Greetings, fellow coffee-lovers. This tutorial will teach you how to clean a 1Zpresso External adjustment grinder.

How often do you clean your 1Zpresso manual coffee grinder? Proper maintenance could prolong the life of your grinder for a long period of time. We advise customers to dismantle the grinder once a month to perform cleaning and maintenance. The grinder can be dismantled without any tools.

Here is a reassembly tutorial for the external adjustment mechanism of X-Pro S, X-Ultra, J-Max S, K-Pro, K-Plus, K-Max, ZP6 スペシャル, and K-Ultra grinders. You can also find cleaning and maintenance tutorials for the internal adjustment and top adjustment on our blog. The image below demonstrates the re-assembly process with the K-Plus and J-Max S grinder.

Table of Contents

Disassembly of External Adjustment Grinder

Step 1

Remove the crank handle and the catch-cup.


J-Max S & X-series (X-Pro S | X-Ultra) grinder: Turn the adjustment dial ring clockwise by around two and a half rotations

J-Max grinder

Step 2

Pressing the burr set and loosen the knurled thumb nut by turning counter-clockwise.


Step 3

Take out the burr set by pressing down the central shaft. Collect the upper ring cap and the upper bearing which inside of the adjustment dial ring.


Step 4

K-series grinder (K-Max | K-Plus | K-Pro | K-Ultra) & ZP6 スペシャル:
The adjustment dial ring and the outer burr ring can be taken out by turning clockwise.

(For K-Pro & ZP6 スペシャル & X-Pro S grinder user: Attaching the catch-cup to remove the outer burr ring by turning clockwise.)


J-Max grinder:
Disassembling the adjustment dial ring is not suggested. The outer burr ring can be taken out by turning forward (reverse threads). 

X-Pro S & X-Ultra grinder:
The adjustment dial ring can be removed by pulling it out. The outer burr ring can be taken out by turning forward (reverse threads). 

Note: the outer burr ring unable to remove without taking out the burr set.

J-Max grinder
Step 4.1

The magnetic catch-cup of K-Plus grinder could be dismantled in three parts.
Remove the magnetic attachment ring by turning counter-clockwise. Turn counter-clockwise to separate the closed receiver from the open receiver.

Perform the step reversely to recover the catch-up.

K-Plus Grinder
K-Plus Grinder
K-Plus Grinder
Press to remove for throughout cleaning.

Step 5

Take out the pc lid by turn counter-clockwise throughout cleaning. Apply some strength to detach the wooden ball.

Clean it with the brush & air blower and be sure do not to apply water to wash it.

Barista cleaning K-Max grinder
Step 5.1

There is another design of the crank handle. It needs a 6mm hex key/Allen key to remove the pc lid by turning counter-clockwise.

Crank handle

Reassembly of External Adjustment Grinder

Step 6

Put the wooden ball into the crank handle till you hear a click sound and tighten the pc lid by turn clockwise.

Turn the outer ring burr counter-clockwise to secure.

Step 6.1

Followed by step 5.1 – Apply a 6mm hex key/Allen key to install the pc lid by turning clockwise till it tightens.

Crank handle

Step 7

Place the pieces in order to ensure the grinder works perfectly. The central shaft and the burr set fixed together, you need to put it back into the grinder. Before that, you have to place the spring then the bearing cap on the burr set.

Note: the spring is the conical shape in which you need to place the larger surface upward as the opposite of the smaller surface and the protruding side of the bearing cap consider facing upward.


Step 8

Insert the upper bearing into the adjustment dial ring. Now it is a tricky part, you would notice there is a horseshoe shape appearing from the upper bearing cap. The flat side from the upper bearing cap needs to match the flat side of the central shaft as well.


Step 9

Pressing the burr set and tighten the knurled thumb nut by turning clockwise till you feel a resistance (do not overtighten or it hurt the burr set).

The next and the last step is the calibration, kindly read the post of How to Calibrate 1Zpresso Grinders? from our blog.

Magnetic catch-cup of K-Plus

Video tutorial - J-Max grinder



(例:JX $129 + 送料 $10 = 合計 $139)

Cancel before an item is shippedfull refund (item’s price + shipping)
= $139
Return an item in original condition within 7 calendar days from the date you received it100% of the item’s price
= $129
Return an item in original condition over 7 calendar days from the date you received it80% of the item’s price
= 129*0.8 = $103.2



*A refund request over 7 calendar days from the date you received an item will be refunded partially (80% of the item’s price) and might be denied since the item has been used.