1Zpresso – K-Series (K-PRO / K-PLUS / K-Max) Grinder
User Instructions
Adjusting the grind setting
- Turn the adjustment dial ring counter-clockwise to make the grinds finer and vice versa.
The number (#) on the dial pointer indicates a finer or coarser grind setting.
The smaller numbers refer to the finer grind setting, vice versa. - There are 9 numbers/90 clicks in a single rotation; every clicks moves the burr by 0.022mm/22 microns.
- Ensure the grinder is well-calibrated after reassembling the grinder.
Read the calibration guide below or the calibration tutorial post. - Refer to the grind setting tutorial post for several brewing methods.
Coffee Grinding
- Remove the handle and put coffee beans into the hopper. The maximum capacity of K-Pro grinder is around 30~35g and K-Plus grinder is around 35g~40g.
- Grind coffee beans clockwise with the handle attached.
Disassembly
Demonstrating with the K-Plus grinder
Note: Kindly follow the step-by-step with the tutorial.
- Turn the adjustment dial clockwise to the coarser grind setting as the burr moving down.
- Loosen the knurled thumb nut counter-clockwise while pushing the burr and take out the upper bearing cap and the upper bearing.
- Take out the shaft, burr, lower bearing cover and spring.
- Remove the burr ring unit and the adjustment dial clockwise from the grinder.
- Clean each of the parts with a brush and an air blower.
Assemble
- Turn the adjustment dial counter-clockwise to the tightest position. Be sure to do not overtighten and stop when you feel resistance.
- Turn the adjustment dial clockwise to the coarser grind setting.
- Turn the burr ring unit counter-clockwise to the tightest position. Be sure to do not overtighten and stop when you feel resistance.
- Put the components back in the right sequence: lower bearing cap (the raised edge side facing upward), spring, shaft and burr.
- Put the components back in the right sequence while pressing the burr: upper bearing, upper bearing cap (the concave edge of the cap facing upward and ensure insert the upper bearing cap with correct direction).
- Turn the knurled thumb nut clockwise while pushing the burr and stop when you feel resistance.
- Turn the adjustment dial to the zero setting and observe its number (#) whether on the #0.
Read the calibration guide below if not pointing at the #0.
Warning:
Do not attempt to disassemble or remove the following components:
The central shaft and the burr
The burr ring unit and the outer burr
The adjustment dial ring
The bearings
Calibrating the Adjustment Dial
- You would need to either loosen or tighten the knurled thumb nut or the adjustment dial to calibrate the grinder.
- It is common for the starting point of the adjustment dial to be around two or more clicks away due to the strength you use to tighten the knurled thumb nut.
Instructions
- Ensure to calibrate the grinder step by step.
- Turn adjustment dial ring counter-clockwise to the zero/tightest settings.
- Ensure the central shaft is not loose nor installed incorrectly.
- The grinder is well-calibrated if the dot is at #0 when the adjustment dial ring is at its tightest position.
Read the following steps for calibration if you don’t get #0 for the zero setting.
If the red dot is pointing at the right side of #0
- Memorize how many clicks the red dot is away from “0”.
Turn the adjustment dial ring clockwise to a coarser setting as the gap inside the adjustment dial ring enlarges.
- Gently press the burr while loosening the knurled thumb nut counter-clockwise by the number of the click divided two.
Turn/retighten the adjustment dial ring counter-clockwise to its zero settings and see what number (#) the red dot points at. - Repeat this step or the next step until the grinder is calibrated.
If the red dot is pointing at the left side of #0
- Memorize how many clicks the red dot is away from “0”.
Turn the adjustment dial ring counter-clockwise to a coarser setting as the gap inside the adjustment dial ring enlarges.
- Gently press the burr while loosening the knurled thumb nut clockwise by the number of the click.
Turn/retighten the adjustment dial ring counter-clockwise to its zero settings and see what number (#) the red dot points at.
- Repeat this step or the step above until the grinder is calibrated.
Precautions
- Do not clean and wash the grinder with water.
- Do not wipe your grinder with solvents other than water and alcohol.
- Keep it in a dry environment in order to extend its lifetime.
- Follow the instructions of re-assembly, ensure to place the components into the correct positions.
- Keep the grinder away from children for safety concerns.
