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Rack adjustment of angle is intended for smooth and more convenient movement of hinge unit at selection of sharpening angle.


This is an upgrade part for the standard vertical rod assembly supplied with all Hapstone models.

It can be installed on Hapstone R1, R2, M2, M3, V8 sharpeners. The minimum and maximum sharpening angle of the knife when using rack angle adjustment depends on the selected model and the configuration of the Hapstone sharpener and the knife itself.

The full range of angles is 12-40 degrees.

1. Hinge assembly with 360 ° rotation and parking hook.
2. Linear bearing ensures minimum possible friction, does not require lubrication and cleaning
3. Steel structure
4. Sharpening angle range 12 - 40 degrees