Systems, devices, and methods for providing different types of sharpeners for knives with a removable angle gauge to determine which knife sharpener to use for individual knives. The sharpener can include three angle sizes of honing ceramic dual wheel sharpeners, three angle sizes of edge shaving diamond coated dual wheel sharpeners, and three angle sizes of new edge blade tungsten rod sharpeners. One angle size can cover approximately 13 degrees to approximately 15 degrees, and include 14 degrees. An angle size can cover approximately 16 degrees to approximately 18 degrees and include 17 degrees. And a third angle size can cover approximately 19 degrees to approximately 21 degrees and include 20 degrees. The removable angle gauge can be a generally rectangular plate with a plurality of grooves, that cover an approximately 13 degree groove, an approximately 14 degree groove, an approximately 15 degree groove, an approximately 16 degree groove, an approximately 17 degree groove, an approximately 18 degree groove, an approximately 19 degree groove, an approximately 20 degree groove, and an approximately 21 degree groove.

Systems, devices, and methods for providing different types of sharpeners for knives with a removable angle gauge to determine which knife sharpener to use for individual knives. The sharpener can include three angle sizes of honing ceramic dual wheel sharpeners, three angle sizes of edge shaving diamond coated dual wheel sharpeners, and three angle sizes of new edge blade tungsten rod sharpeners. One angle size can cover approximately 13 degrees to approximately 15 degrees, and include 14 degrees. An angle size can cover approximately 16 degrees to approximately 18 degrees and include 17 degrees. And a third angle size can cover approximately 19 degrees to approximately 21 degrees and include 20 degrees. The removable angle gauge can be a generally rectangular plate with a plurality of grooves, that cover an approximately 13 degree groove, an approximately 14 degree groove, an approximately 15 degree groove, an approximately 16 degree groove, an approximately 17 degree groove, an approximately 18 degree groove, an approximately 19 degree groove, an approximately 20 degree groove, and an approximately 21 degree groove.

An adjustable sharpener including a body having two sharpening slots, a first arm with a first abrasive element connected to a second arm with a second abrasive element, and a third arm with a third abrasive element connected to a fourth arm with a fourth abrasive element. The first and second abrasive elements are positioned in the first sharpening slot, and the third and fourth abrasive elements are positioned in the second sharpening slot. The adjustable sharpener also includes an adjuster connected to the body and an adjustment assembly connected to the adjuster, the first arm and the third arm. Linear movement of the adjuster causes rotational movement of the first arm and the third arm. In this regard, the adjuster allows the user to manually increase or decrease the sharpening angle between the abrasive elements in the sharpening slots.

An adjustable sharpener including a body having two sharpening slots, a first arm with a first abrasive element connected to a second arm with a second abrasive element, and a third arm with a third abrasive element connected to a fourth arm with a fourth abrasive element. The first and second abrasive elements are positioned in the first sharpening slot, and the third and fourth abrasive elements are positioned in the second sharpening slot. The adjustable sharpener also includes an adjuster connected to the body and an adjustment assembly connected to the adjuster, the first arm and the third arm. Linear movement of the adjuster causes rotational movement of the first arm and the third arm. In this regard, the adjuster allows the user to manually increase or decrease the sharpening angle between the abrasive elements in the sharpening slots.

A tool assembly is arranged for simultaneous treatment of both sides of the edge of a knife. The tool assembly comprises a tool in the form of a stave having faces extending longitudinally between first and second ends of the stave. A holder is provided in which the stave is journaled pivotally within a restricted pivot angle range (α) defined by a pivot limit function accomplished through interaction between the holder and the stave. A pivot journal means, for example, in the form of a pivot pin and a pinhole, is arranged for journaling the stave pivotally about a center axis of the stave.

A tool assembly is arranged for simultaneous treatment of both sides of the edge of a knife. The tool assembly comprises a tool in the form of a stave having faces extending longitudinally between first and second ends of the stave. A holder is provided in which the stave is journaled pivotally within a restricted pivot angle range (α) defined by a pivot limit function accomplished through interaction between the holder and the stave. A pivot journal means, for example, in the form of a pivot pin and a pinhole, is arranged for journaling the stave pivotally about a center axis of the stave.

An apparatus for the treatment of cutting edges includes a first and second tools each having treatment surfaces. The treatment surfaces are arranged to define a V-shaped groove for receiving a cutting tool to be sharpened. The tools are driven by a main shaft and are connected to the main shaft via eccentric bodies rotationally fixed on the main shaft, connecting rods attached to the eccentric bodies, and auxiliary shafts connecting the connecting rods to the first and second tools. A power unit is configured to rotate the main shaft, wherein rotation of the main shaft causes the first and second tools to reciprocate up and down relative to the main shaft.

An apparatus for the treatment of cutting edges includes a first and second tools each having treatment surfaces. The treatment surfaces are arranged to define a V-shaped groove for receiving a cutting tool to be sharpened. The tools are driven by a main shaft and are connected to the main shaft via eccentric bodies rotationally fixed on the main shaft, connecting rods attached to the eccentric bodies, and auxiliary shafts connecting the connecting rods to the first and second tools. A power unit is configured to rotate the main shaft, wherein rotation of the main shaft causes the first and second tools to reciprocate up and down relative to the main shaft.

An adjustable sharpener including a body having two sharpening slots, a first arm with a first abrasive element connected to a second arm with a second abrasive element, and a third arm with a third abrasive element connected to a fourth arm with a fourth abrasive element. The first and second abrasive elements are positioned in the first sharpening slot, and the third and fourth abrasive elements are positioned in the second sharpening slot. The adjustable sharpener also includes an adjuster connected to the body and an adjustment assembly connected to the adjuster, the first arm and the third arm. Linear movement of the adjuster causes rotational movement of the first arm and the third arm. In this regard, the adjuster allows the user to manually increase or decrease the sharpening angle between the abrasive elements in the sharpening slots.

An adjustable sharpener including a body having two sharpening slots, a first arm with a first abrasive element connected to a second arm with a second abrasive element, and a third arm with a third abrasive element connected to a fourth arm with a fourth abrasive element. The first and second abrasive elements are positioned in the first sharpening slot, and the third and fourth abrasive elements are positioned in the second sharpening slot. The adjustable sharpener also includes an adjuster connected to the body and an adjustment assembly connected to the adjuster, the first arm and the third arm. Linear movement of the adjuster causes rotational movement of the first arm and the third arm. In this regard, the adjuster allows the user to manually increase or decrease the sharpening angle between the abrasive elements in the sharpening slots.