Riser Support for Work Sharp Ken Onion Mk.2 Blade Grinding Attachment

This riser support is designed for the Work Sharp Ken Onion Mk.2 Blade Grinding Attachment.

The riser makes it easier to maintain a consistent sharpening angle between the knife and the sanding belt, resulting in a noticeably sharper final edge and it should already be included as a standard component in the original Blade Grinding Attachment.

Mounting Options

The rear of the riser includes a 3 mm mounting hole, allowing the riser to be securely fastened to the attachment. This helps prevent movement and potential damage during sharpening.

For screw mounting:

• Drill a 2.5 mm hole in the aluminum housing and tap M3 threads, or

• Drill a 3 mm hole and use a 3 mm screw with a nut.

Optional Modifications

• A piece of leather can be glued to the 45-degree rear ramp for manual stropping or polishing.
  A polyurethane (PU) adhesive is suitable for this purpose.

• I primarily use a 15-degree sharpening angle, so I additionally glued a thin steel plate on top of the riser to reach closer to the sanding belt. This modification is optional.
  A two-part epoxy adhesive was used to attach the steel plate.
  A thin layer of two-part epoxy resin was applied on top of the steel plate to prevent scratching the knives during sharpening.

Print Settings

• Material: PETG, alternative filament materials can also be used.

• Infill: 100%, lower infill percentages can also be used.

• Print orientation: Tilted 90 degrees.

• Supports: Standard supports enabled.

Files

• CAD file included for users who want to modify the design.