Type PY: Tapped Orthogonal Cross Hole (Cross Hole ≦ Main Bore)

The Start Point is at the center of the Cross Hole in the YZ plane. Along the X-axis, it is as indicated in the figures below.


Example: Tapped Orthogonal Cross Hole (Cross Hole ≦ Main Bore)


Content of XEBEC Path for Tapped Holes (Pre & Fin)

Pre Path: to be used on the clearance hole prior to tapping

    • Pre Path forms a large edge break at the exit of the clearance hole, to suppress formation of burrs during tapping
    • It performs edge breaking in three passes rather than in a single pass to reduce cutting resistance.

Fin (Finish) Path: to be used after tapping to finish

    • Fin Path forms edge break length of 0.02mm after tapping.
    • It removes burrs that are generated during the tapping operation.

Do not use Fin Path if you are using a roll tap
There is a risk of tool collision if Fin Path is used on a inner thread created by a roll tap, due to the deformation of the inner diameter resulting from roll tapping.


Steps to Use XEBEC Path for Tapped Holes
  1. Drill the clearance hole
  2. Use Pre Path to break edge
  3. Tapping
  4. Use Fin Path to finish


Alternative Steps to Shorten the Cycle Time

  1. Drill the clearance hole

  2. Use Fin Path to break edge

  3. Tapping

When omitting Pre Path and using Fin Path only, the Cutter will need to remove a greater amount of material as it travels in the radial direction initially from the Start Point, prior to breaking the edge. For safety, reduce the initial feed rate in the radial direction. After that, continue at the recommended feed rate.



XEBEC