This is a precision 3D-printed knife sharpening jig designed for consistent, controlled edge sharpening using a guided bearing system set to a fixed 15° sharpening angle.

The sharpening stone holder block is sized to fit 101mm x 25mm x 13mm abrasive inserts, making it compatible with a wide range of standard sharpening stones and custom-cut abrasives.

The guide system runs on smooth bearings with a 4mm inner diameter and 11mm outer diameter, ensuring low-friction, stable movement across the sharpening surface while maintaining a precise and repeatable 15° edge angle. (4x needed) 

Inside the 3MF design, there are integrated slots for 3 × 4mm x 4mm neodymium magnets, allowing secure retention and quick alignment of components where needed.

Key Features:

• Fixed 15° sharpening angle for consistent, repeatable results
• Bearing-guided motion for smooth, controlled sharpening
• Stable geometry to maintain accurate edge alignment
• Fits 101 × 25 × 13mm sharpening stone inserts
• Bearings: 4mm ID / 11mm OD for smooth travel
• Integrated magnet slots (3 × 4mm x 4mm magnets)
• Compact, workshop-ready, and fully 3D printable
• Ideal for kitchen, EDC, and utility knives

Designed for makers who want a reliable mechanical sharpening system that removes guesswork and delivers a sharp, consistent edge every time.

EXTRA:

MR114 Bearing x4