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Description

Hapstone Modular Platform

Complete sharpening system. Ready now.

Hapstone R2 Black is a fully equipped guided knife sharpener with universal angled clamps, whole milled angled clamps, and a Fine-Tuning Adapter already included for maximum versatility across different knife types.

Complete setup

Everything included from the start.

Hapstone R2 Black is a complete system here and now — no need to build the configuration later. It already includes the core upgrades many users add separately.

Versatility

Broader knife coverage.

With both universal angled clamps and whole milled angled clamps included, the R2 Black is a strong choice for covering the widest possible range of knife shapes and sharpening tasks.

Precision

Fine angle control built in.

The included Fine-Tuning Adapter allows quick and precise micro-adjustments of the sharpening angle. It makes angle control smoother and more accurate during sharpening.

Hapstone Fine-Tuning Adapter for R2 Black

Universal Angled Clamps for Hapstone R2 Black

Universal clamps

Flexible blade positioning.

Universal Angled Clamps can be adjusted inward or outward to handle a wide range of blade lengths and geometries.

Whole Milled Angled Clamps for Hapstone R2 Black

Whole milled clamps

Rigid and confidence-inspiring.

Whole Milled Angled Clamps provide a solid one-piece construction for dependable blade holding and excellent control.

Why R2 Black

One system. Wider sharpening coverage.

Hapstone R2 Black is built for users who want a stronger setup from day one. With two clamp styles and fine angle adjustment already included, it covers more sharpening scenarios without requiring immediate add-ons.

More versatility

Universal angled clamps and whole milled angled clamps are included in one package.

Better control

The Fine-Tuning Adapter helps make small angle changes quickly and precisely.

Ready now

This is a complete sharpening system here and now, not a base configuration that requires immediate upgrades.

Broader knife range

A strong option for maximizing compatibility with different blade shapes, sizes, and sharpening tasks.

Clamp options

Two clamp styles in one package.

The R2 Black combines versatile universal clamps with rigid whole milled angled clamps in one kit. This gives you more freedom to choose the best clamping style for different knives without needing immediate add-ons.

Clamp comparison

Universal vs Whole Milled

Universal Angled Clamps	More flexible in positioning, easy to adapt for different blade lengths and shapes, excellent for general-purpose sharpening.
Whole Milled Angled Clamps	More rigid one-piece construction, confidence-inspiring blade holding, excellent when maximum structural stiffness is preferred.
Why both matter	Having both clamp types in one system gives you broader practical coverage and more freedom to choose the right clamp style for each knife.

Stone holder

Compatible with popular formats.

Supports 6" sharpening stones in Edge Pro and KME formats, giving you wide abrasive compatibility.

Base

Stable and workshop-ready.

The platform base with rubber-coated feet helps keep the sharpener steady on the work surface during use.

What’s included

Complete kit. Upgrade-ready platform.

Hapstone R2 Black includes the essential R2 platform plus upgraded clamp options and fine angle adjustment, making it a strong all-in-one configuration for users who want maximum flexibility from the beginning.

Base & Rods

1 Platform base
1 Vertical guide rod
1 Horizontal guide rod
1 Lightweight alloy guide rod with wooden handle

Pivot & Rotation

1 Linear ball-bearing pivot unit
1 Rotating clamp module
Adjustable flipping strength

Clamps

1 pair of Universal Angled Clamps for Hapstone R2
1 pair of Whole Milled Angled (Fillet) Clamps for Hapstone R2

Fine Adjustment

1 Fine-Tuning Adapter for precise angle control

Accessories

2 Spring-Assisted Stopper ⌀6 mm
1 Ball-End Hex Screwdriver 4 mm “Fire Orange” for Hapstone R2
1 Digital Angle Gauge Hapstone

Technical details

Specifications

System	Hapstone R2 Black
Platform	Hapstone Modular Platform
Clamp Module	Rotating clamp module with adjustable flipping strength
Included Clamps	Universal Angled Clamps for Hapstone R2 (2 pcs) Whole Milled Angled (Fillet) Clamps for Hapstone R2 (2 pcs)
Included Adapter	Fine-Tuning Adapter
Sharpening Angle Range	12° to 40° (varies by clamp and blade)
Blade Capacity	Up to 12" (300 mm) long and up to 1/4" (8 mm) thick
Stone Compatibility	6" (160 mm) stones, Edge Pro & KME formats
Pivot Type	Linear ball-bearing pivot, no lubrication needed
Guide Rod	Lightweight alloy guide rod with wooden handle
Base	Rubber-coated feet for enhanced stability
Sharpening Stones	Not included
Warranty	5 years

Compatibility

Supported clamps and add-ons

Compatible Clamps	Universal Angled Clamps for Hapstone R2 (included) Whole Milled Angled (Fillet) Clamps for Hapstone R2 (included) Universal Straight Clamps for Hapstone R2 Central Y-Shaped Clamp for Hapstone R2 Whole Milled Straight Clamps for Hapstone RS Small Whole Milled Angled Clamps for Hapstone RS Small Central Y-Shaped Clamp for Hapstone RS Small Universal Angled Clamps for Hapstone RS
Optional Add-ons	Convex Adapter for Hapstone (Gen 2) Convex Mini-Adapter Spring-Assisted Stopper ⌀6 mm Thickness Compensator for R2/V8 Vertical Rod (Gen 2) for R2/V8 Hapstone Lighting System Extendable Table Module (V8) Chisel Sharpening Module Scissors Sharpening Module Turntable Module for round knives

Note: Sharpening stones are not included. Please select compatible stones and optional accessories using the product options above.

Specifications
Dimensions (L x W x H)	23.6"х 8.4" х 10.8" (600 х 215 х 275 mm)
Maximum blade length	12" (320 mm)
Weight	9.1 lbs (4300 g)
Maximum blade thickness	to 0.3" (8 mm)
Sharpening angle	from 8° to 40°
Minimum blade length	1.6" (40 mm)
The size of the stone	6" x 1" (150 x 25 mm) 4" x 1" (100 x 25 mm)
Kit
Whole milled angled (fillet) clamps Hapstone (Pair)	Included
Universal Angled Clamps for Hapstone R2 (Pair)	Included
Small Whole milled angled clamps Hapstone (Pair)	—
Rotating Clamp Module (R2 Module)	Included
Extendable Magnetic Table (V8 Module)	—
Fine-Tuning Adapter for Hapstone	Included
Spring-Assisted Stopper Rings	Included
Thickness Compensator Hapstone	—
Digital Angle Gauge	Included
Ball-End Hex Screwdriver	Included
Marker	Included
Compatibility of Module
Vertical Module for Hapstone R2/V8	✅Compatible
Precision angle adjustment module for Hapstone R1/R2/M3/V8	✅Compatible
Chisel module	✅Compatible
Extendable Magnetic Table (V8 Module)	✅Compatible
Scissors Attachment for Hapstone	✅Compatible
Hapstone Lighting System	✅Compatible
Compatibility of Accessories
Thickness Compensator Hapstone RS	❌Incompatible
Thickness Compensator Hapstone R2	✅Compatible
Spring-Assisted Stopper Ring	✅Compatible
Fine-Tuning Adapter for Hapstone	✅Compatible
Convex Adapter for Hapstone	✅Compatible
Compatibility of Clamps
Small Side Clamps for Hapstone	✅Compatible
Small Whole milled angled clamps Hapstone	✅Compatible
Universal Angled Clamps for Hapstone	✅Compatible
Whole milled angled (fillet) clamps Hapstone	✅Compatible