Name: KMFS Sensei
Brand: KMFS
Price: 480,75 EUR
Availability: InStock

§ 01

System Summary

rev.kin.

Reverse kinematics — knife moves over the stone

4angles

Fixed detent stops: 15 / 17.5 / 20 / 22.5°

mag.clamp

Magnetic blade clamping — no tools

∞stones

Compatible with any sharpening stones

The KMFS Sensei is a reverse-kinematic sharpening system — fundamentally different from every other KMFS model. Where standard systems hold the knife fixed and move the abrasive, the Sensei does the exact opposite: a large sharpening stone rests on the table and the user holds a massive arm with the magnetically clamped knife, moving it across the full surface of the stone. Any water stones, bench diamonds or natural slate can be used — the user's own stone collection, with no dependency on proprietary abrasives. Angle is held by a CNC-machined mechanism with fixed detent stops. Magnetic blade clamping provides instant, precise positioning with no risk of slipping.

§ 02

Hardware Components

Arm with Magnetic Blade Clamp

Solid duralumin arm with integrated magnets for blade retention

Arm materialDuralumin ENAW 7075 T651

SurfaceHard anodising

Blade clampingIntegrated permanent magnets (NdFeB)

Blade protectionTape recommended (standard practice)

MotionUser holds arm in hand, moves over stone

Magnets hold the blade rock-solid — you simply bring the knife close and the system catches it. Taping the blade is recommended to prevent micro-scratches from metal swarf.

Angle Head with Fixed Detent Stops

Indexed head with 4 fixed positions for the most common bevel angles

Fixed angles15° / 17.5° / 20° / 22.5°

Setting methodMechanical detent — clicks into position

Optional accessoryContinuous-range adjustment head

Angle stabilityMaintained throughout sharpening

Four fixed positions cover the vast majority of real-world sharpening needs. An optional continuous-range adjustment head is available for users requiring non-standard angles.

Stone Height Adjustment Collar

Arm head for compensating different stone thicknesses

Height adjustmentScrew / unscrew the arm head collar

SpeedA few seconds

Stone rangeVarious heights of standard water / bench stones

Simply threading the arm head collar in or out sets the correct height for the current stone's thickness. Essential for users with a mixed stone collection.

Spring-loaded Stone Bed

Bench base with spring retention for the sharpening stone

Stone retentionSpring bed — press in, lock

Stone releasePull bed — instant swap, no tools

CompatibilityStandard water stones + dovetail-mount bench stones

Bench stabilityAnti-slip base

The spring bed holds the sharpening stone firmly in place. Stone swaps are tool-free — just pull. Dovetail compatibility expands usable abrasives to include flat diamond plates.

§ 03

Reverse Kinematics — Comparison

Property	KMFS Sensei (reverse)	Standard guided system
What moves	Knife in hand — moves over the stone	Abrasive on rod — moves over the knife
Abrasive surface used	Full surface of any stone	Small strip of proprietary abrasive
Abrasive type	Any — water stones, diamonds, natural, slate	System-specific paddles only
Material removal efficiency	Higher — full stone face in contact	Lower — small abrasive area
Blade clamping	Magnetic — instant, tool-free	Mechanical vice (screw / Allen key)
Footprint	Stationary — requires a workbench	Compact — portable

§ 04

Sharpening Angles

15°

Japanese knives

17.5°

Thin European blades

20°

Kitchen knives

22.5°

Outdoor / robust blades

Fixed detent stops for the 4 most common angles. Optional continuous-range head available. Values are per-side; full included angle = 2×.

§ 05

Compatible Abrasives

Abrasive type	Examples	Wet / dry	Note
Japanese water stones	Shapton, King, Naniwa, Suehiro…	Wet (water)	Most natural pairing with reverse kinematics
Bench diamond plates	DMT, Atoma, Dia-Sharp…	Dry or with a drop of water	Compatible via dovetail adapter
Natural stones	Arkansas, Belgian coticule, natural slate…	Oil or dry	Ideal for final polishing
Synthetic ceramic stones	Corundum, silicon carbide…	Wet (water)	Cost-effective for coarse work
Leather strop with paste	Cow / canvas leather + chromium paste	Dry	Final polishing, burr removal

The Sensei is not dependent on proprietary abrasives — users can fully utilise their existing stone collection. Abrasives are not included in the base package.

§ 06

Materials Overview

Component	Material	Grade / spec	Surface finish
Arm with blade clamp	Duralumin alloy	ENAW 7075 T651	Hard anodising
Angle adjustment head	Duralumin alloy	ENAW 7075 T651	Hard anodising
Base / stand	Duralumin alloy	ENAW 7075 T651	Hard anodising
Spring stone bed	Duralumin + stainless spring	—	Anodised / polished
Fasteners / hardware	Stainless steel	—	As-machined
Blade clamping magnets	Permanent neodymium magnets	NdFeB	Recessed into arm body
Carrying case	Plastic (PP)	—	Shaped foam insert

§ 07

Package Contents

#	Item	Qty	Note
1	KMFS Sensei arm with magnetic clamp	1	Fully assembled, ready to use
2	Base with spring stone bed	1	Anti-slip — stays firmly on bench
3	Angle head (4 fixed positions)	1	15° / 17.5° / 20° / 22.5°
4	Allen keys	set	For adjustment and assembly
5	Carrying case with shaped foam insert	1	Protective transport case

Sharpening stones are not included in the base package — the system is designed to be used with the user's own stone collection.