Compression | Series 25 and 25M

A major challenge in machining with composite material is preventing separation of material layers during the machining process. By incorporating both a left and right-hand helix, the cutting pressure to the center of the work piece is compressed, eliminating the fraying of the material.


  • Left handed helix directs cutting forces downward in a pushing action, great for holding parts securely against a fixture
  • Right handed helix directs cutting forces upward in a pulling action, great for chip evacuation
  • The lower portion of the flute directs loads upwards and the upper portion of the flute directs loads downward, minimizing the forces which cause delamination and fraying.
  • Available with Di-NAMITE coating for longer, cleaner performance


Cutting Diameter 1/4″-1/2″ / 6,0-12,0
Length of Cut 1″-1 1/2″ / 25,0-38,0
Overall Length 2 1/2″-3 1/2″ / 63,0-89,0
Shank Diameter 1/4″-1/2″ / 6,0-12,0
Intersect Length 11/64″-23/64″ / 4,10-8,60
Number of Flutes 4-8
Coating(s) Di-NAMITE, Uncoated


  • Plastics / Composites


  • Aerospace
  • Medical
  • Power Generation
  • Automotive
  • Mold & Die
  • Casting & Foundries
  • General Engineering