YEH-98L · Single Dose Coffee Grinder

The flat burr grinder
built for obsessive
precision.

98mm flat burrs. 2000W FOC motor. Stepless 0–200 grind adjustment at 5 microns per click. Built for espresso, pour-over, and everything in between — with ≤0.1g retention and virtually no static.

98mm Flat Burr
2000W FOC Motor
≤0.1g Retention
Order Now Full Specs
5μm per grind click
300–2000 RPM continuous
SUS304 burr seat material
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Single Dose DesignGrind only what you need

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Patent Leveling SystemSwap burrs without recalibrating

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Low Static OutputNo water, no ionizer needed

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12-Month WarrantyFull support included

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Aluminum Alloy Body15× better heat dissipation than steel

Core Engineering

Every detail engineered for
the serious home barista.

The YEH-98L isn't a lifestyle grinder. It's a precision instrument — designed around the principles that drive professional café equipment, scaled for the single-dose workflow.

01
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Precision Angular Contact Spindle

An independent spindle built with precision angular contact bearings delivers micron-level runout tolerance. Consistent burr gap means consistent particle distribution — every single dose.

Micron-level runout
02
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Patent Quick-Level Mechanism

The internal leveling mechanism is factory-set and stays fixed through burr changes and cleaning — no recalibration required. Disassemble the top in seconds with four screws.

Zero recal on burr swap
03
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2000W In-House FOC Motor

A custom-wound brushless motor with Field-Oriented Control keeps torque stable from 300 to 2000 RPM — no speed sag under load. Tune RPM for espresso density or pour-over clarity.

FOC · 300–2000 RPM
04
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Stepless 0–200 Grind Adjustment

Each click moves the burr gap by exactly 5 microns. Dial in espresso at setting 3 or open up to 10–11.5 for pour-over. The full 200-step range covers Turkish to cold brew.

5μm per click
05
≤

≤0.1g Retention — By Design

Single-dose grinding demands near-zero retention. The YEH-98L's internal geometry and low-static output channel keep waste under 0.1g without fans, water sprays, or ionizers.

True single dose
06
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Aluminum Alloy + SUS304 Construction

The integrated aluminum body dissipates heat 15× faster than stainless steel, protecting grind temperature and flavor. Internal burr seats are SUS304 for longevity and food safety.

Thermal control
200 grind steps
Turkish
~1
Espresso
~3
Moka Pot
~5
Pour Over
~11
French Press
~15
Cold Brew
~18

Grind Precision

0.01–0.02mm accuracy.
5 microns per click.

The finest espresso grinders on the market move in increments of 10–20 microns. The YEH-98L moves in 5. That's the difference between chasing a shot and dialing one in.

The "coarse → fine" adjustment principle applies: always approach your target from the coarser side, reducing in small steps for the most precise and repeatable positioning.

  • 0–200 stepless scale — no numbered click stops to skip over
  • Factory zero-point set as burr-touch position for safety reference
  • Adjust grind size while running at lowest RPM for accurate feel
  • Light roasts: go finer; dark roasts: go coarser — from the same base

Burr Compatibility

One grinder. Every brewing method.

The YEH-98L ships with the Lebrew 98 magnetic blind burr and is compatible with a broad ecosystem of 98mm and 102mm flat burr options.

Lebrew 98 Espresso

Included

The standard magnetic blind burr. Optimized for Italian-style espresso shots with dense, saturated body and classic sweetness.

ESPRESSO · MOKA · RISTRETTO

Lebrew 98 Filter

Included

Hand-pour optimized burr geometry. Enhanced clarity and brightness for V60, Chemex, Kalita, and other filter methods.

POUR OVER · DRIP · AEROPRESS

98-LC Curved (Medium)

Included

The balanced option — medium-shallow roast profile. Bridges espresso and filter with a versatile grind character.

MILK DRINKS · MEDIUM ROAST

98/102mm Flat Burrs

Compatible

Both magnetic and keyed (holed) burr formats are supported. Switching to 102mm burrs requires an adapter seat (available separately).

UPGRADE PATH

SSP 98 Series

Compatible

Supports SSP 98hu / lu / ultra / ls / brew burr sets for those who want to go further. SSP burrs are widely regarded as a top-tier aftermarket upgrade.

HIGH-UNIFORMITY · COMPETITION

Magnetic Quick-Swap

System

The magnetic blind burr system enables burr swaps in under a minute — no alignment tools needed, no recalibration required after reinstallation.

FAST SWAP · ZERO RECAL

Drive System

2000W. FOC controlled.
Built in-house.

Most grinders at this price use off-the-shelf motors running open-loop. The YEH-98L runs a custom-wound brushless motor paired with FOC (Field-Oriented Control) — the same principle used in industrial servo drives.

The result is constant torque across the full RPM range. Whether you're pulling a 20g espresso at 1200 RPM or running a pour-over dose at 400 RPM, the burrs don't slow down mid-grind.

RPM RANGE — 300 to 2000 continuous

300 rpm1000 rpm2000 rpm
2000 WATTS PEAK POWER
Motor typeBrushless / FOC
Speed range300–2000 RPM
ControlDynamic torque response
Power supply220V / 50–60Hz
Speed adjustCW = higher / CCW = lower

Grind Guide

Recommended settings for
every brewing style.

These are starting points for the included Lebrew 98 burr. Adjust by 0.5–1 setting at a time and note that light roasts generally grind finer, dark roasts coarser at the same dial position.

Brew Method Grind Setting RPM Range Notes
Espresso (Italian) ~3Standard dial 1000–1500 RPM Dense, low-void grind. Fine-tune extraction time in 0.5 increments.
Espresso (Medium–Light) ~2–4Adjust for roast 1200–1600 RPM Light roasts extract faster — go finer. Expect longer dial-in with new coffees.
Moka Pot ~4–6Between espresso/filter 800–1200 RPM Slightly coarser than espresso prevents channel pressure buildup.
Pour Over / V60 ~10–11.5Hand-pour range 200–700 RPM Lower RPM preserves clarity and brightness in filter cups. Adjust for flow rate.
French Press ~14–16Coarse 300–600 RPM Coarser grinds reduce fines in the cup. Use lower RPM for even particle distribution.
Cold Brew ~16–20Very coarse 300–500 RPM Long steep time (12–24h) calls for very coarse grind to avoid over-extraction.

Technical Specifications

Full spec sheet.

ModelYEH-98L
Burr Size98mm flat burr (standard magnetic blind burr included)
Burr Compat.98/102mm flat burr; magnetic blind & keyed; SSP 98hu/lu/ultra/ls/brew
SpindlePrecision angular contact bearing, independent spindle design
LevelingPatent internal quick-leveling mechanism
Quick Access4-screw top removal for direct burr exposure
MotorIn-house 2000W brushless, FOC control
Grind Accuracy0.01–0.02mm
Grind Scale0–200 stepless; 1 step = 5 microns
Grind ModeSingle dose
Static / OutputLow static; fluent discharge; no clogging
Retention≤ 0.1g
Power220V / 50–60Hz
Peak Power2000W
RPM Range300–2000 RPM continuous
Hopper Capacity25–35g
Body MaterialIntegrated aluminum alloy (15× heat dissipation vs. stainless)
Burr SeatSUS304 stainless steel
Dimensions220 × 150 × 330mm (W × D × H)
Package Size410 × 410 × 215mm
Weight12.5kg
ColorsFull Black / Silver-Black

Cleaning & Maintenance

15 minutes, every 15 days.

The YEH-98L is built to be cleaned — not just used. Four screws give you full access to both burrs and the grind chamber. No tools beyond the included hex key set.

1

Disconnect Power

Unplug the power cable from the rear panel before touching any components.

2

Remove Top Components

Detach the press-air hopper and discharge chute from the body.

3

Remove 4 Screws

Use the included hex key to remove the four top screws, exposing the full burr assembly.

4

Clean Burrs & Chamber

Use a small brush or handheld vacuum to clear all grind residue. Wipe mating surfaces with a dry cloth.

5

Reassemble

Align the top section vertically and lock down four screws. Reattach chute and hopper.

After-Sales Service

We stand behind the machine.

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12-Month Full Warranty

All manufacturing defects covered for 12 months from purchase — including motor failure, switch faults, and abnormal grinding performance. Consumables (burrs, brush) covered for 3 months.

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Free Repair (CN Mainland)

Domestic customers receive free round-trip shipping and repair during the warranty period. International customers cover return freight and customs; repair labor is complimentary.

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Lifetime After-Sales

Even after warranty expiry, YEHJEN provides paid repair service with genuine parts. Technical support line: 18144652589. Service hours: Mon–Fri, 9:00–18:00 (CST).

In the Box

Everything you need to start grinding.

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YEH-98L Grinder Body

× 1

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Discharge Chute

× 1

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Press-Air Hopper

× 1

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Grounds Cup

× 1

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Power Cable

× 1

⌒

Cleaning Brush

× 1

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Hex Key Set

× 1 set

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Magnetic Burr Removal Tool

× 1