Hapstone R2 Opti Knife Sharpener

The Hapstone R2 Opti is a premium knife sharpening system built on the versatile Hapstone Modular Platform. Combining high precision, maximum rigidity, and modular expandability, the R2 Opti is ideal for enthusiasts looking for advanced performance right out of the box.

This version comes with a pair of whole milled angled clamps made from a solid piece of aircraft-grade aluminum, anodized in black for added corrosion resistance and surface strength. These clamps provide unmatched stability and are especially well-suited for Scandinavian grinds, kitchen knives, EDC blades, and fillet knives.

Each clamp is fixed with a single screw, making installation quick and convenient — especially compared to multi-screw clamp systems. The design also includes an undercut, allowing for sharpening knives with a full flat grind. The clamps can slide freely along the rotating clamp module, making it easy to secure knives up to 30 cm in length.

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

Key Features

• Rotating clamp module with adjustable flipping strength
• Sharpening angle range: 8° to 35° (*depends on blade geometry)
• Max blade length: 12" (300 mm), max thickness: 1/4" (8 mm)
• Whole milled aluminum clamps – ultra rigid and corrosion resistant
• Two types of screws included:
  • Short – for thin blades and minimum bite
  • Standard – for general-purpose sharpening
    
• Compatible with 6" (160 mm) stones (Edge Pro & KME formats)
• Linear ball-bearing pivot – smooth movement, no lubrication required
• Lightweight alloy guide rod with wooden handle
• Rubber-coated feet for stable operation on any surface

Clamp Compatibility

The R2 Opti is compatible with a wide range of Hapstone clamps:

• Universal Angled Clamps for Hapstone R2
• Universal Straight Clamps for Hapstone R2
• Whole Milled Angled (Fillet) 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

Modular Add-ons (Optional)

• Precise Angle Adjuster for Hapstone R1/R2/V8/M3
• Convex Adapter for Hapstone (Gen 2)
• Convex Mini-Adapter
• Spring-Assisted Stopper ⌀6mm
• 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 sharpening round knives (leathercraft)

What's Included

• Platform base
• Vertical and horizontal guide rods
• Linear ball-bearing pivot unit
• Rotating clamp module
• Whole Milled Angled Clamps (2 pcs)
• 2 Sets of Screws (Standard + Short)

Warranty

All Hapstone R2 sharpeners include a 5-year warranty. You can count on durability, consistent performance, and full support from the manufacturer.