Table of Contents

Radial Rake Angle and Radial Relief Angle Measurement on the Cutting Plane

The method for measuring angles on the tool cutting plane scan is illustrated below:

Tool angle measurement

Radial Rake Angle (α)

  1. Sweep along the tool rotation direction to find the trailing point A of the cutting edge
  2. Connect point A to the center O
  3. The angle ∠OAA' between line OA and the first polyline endpoint A' on the cutting side of the edge is the rake angle α

Radial Relief Angle (β)

  1. Find the contact point B between the tool and the envelope circle
  2. Construct the tangent line Lt to the envelope circle at point B
  3. BB' is the first line segment on the relief side of the tool
  4. Pick an arbitrary point B'' on Lt in the relief direction
  5. The angle ∠B'BB'' between BB' and Lt is the relief angle β