Rose Engine Cutter

The Cutter's cutting edge is formed by in multiple steps. The order of operations is shown for each cutter's shape in the respective comments.

As with other tools, these cutters should be re-honed many times before they need to be re-ground (i.e., re-shaping them). This saves time, as well as making better use of the investment in the cutter metal.

Once the shape is established, the sharpener only needs to re-shape the cutter occasionally. Re-hone often.

The cutter shown to the right is a "V" shaped cutter, but shows the general ideas behind the angles noted below. The cutting edge shapes shown below are the cutter when viewed from the top.

General Guidelines
Cutting Edge Shape
(Top View)
Angle / Jig Settings Jigs in Use Comments

U
Hole = B
JS = 4
P = 55

β = 65º
Jigs Used :

Order of operations :

  1. Shape the Cutter
    1. Flatten the top
    2. Round over the front
  2. Sharpen the Cutter
    1. Hone the rounded, bottom edge
    2. Hone the top (ensuring to remove any burrs)

General Comments :

  • The high β angle helps support the cutting edge.

V
β = 30º

USB Distance to Grindstone = Projection Calculator

Jigs Used :

Order of operations :

  1. Shape the Cutter
    1. Grind the bevel
      • Doing this operation first makes a conical shape without having to be concerned with rounding over the edges where the bevel meets the flat
      • Then grinding off the flat makes for a crisp edge
    2. Flatten the top
  2. Sharpen the Cutter
    1. Hone the conical edge (the bottom of the cutter)
    2. Hone the top (ensuring to remove any burrs)

Square
β = 65º Jigs Used :

Order of operations :

  1. Shape the Cutter
    1. Flatten the top
    2. Bevel the front edge
  2. Sharpen the Cutter
    1. Hone the front edge
    2. Hone the top (ensuring to remove any burrs)

General Comments :

  • The high β angle helps support the cutting edge.


Notes & Comments
Information regarding Grindstones

The plan for making the Cutter Shaft for use with the SVD-186 / SVD-185 Jig is in the link (or click on the picture above).

Dimensions for the Cutter Holder are less critical.

  1. The end hole must be drilled for the cutter size.
  2. The diameter of the overall shaft must fit into the SVD-186 jig. I used 1 inch steel rod.

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