Precision Chamfering for the
Front and Back of Through
Holes

• Chamfers front and back in a single pass
• Adjustable chamfer range to provide
   precise chamfer size
• Solid carbide cutting blades with coatings
   to provide long tool life
• Sliding surface in blade geometry prevents
   damage to finished holes



  The HEULE DEFA chamfering tool was designed to offer controlled chamfers over a range of adjustments. DEFA chamfers the front and back of through holes without reversing the spindle or indexing the work piece. It allow the user to set the blade force, which holds the blades to the desired size and allows the blades to cut consistent chamfers despite material or burr size. This provides precise front and back chamfers specific to the user’s needs.

Tested and approved by the major jet engine and aircraft component suppliers, the DEFA tooling produces accurate front & back chamfer break edges in Titanium, Inconel and other Nickel alloys.


 Bore  Tool Series
 Ø 4.0 – Ø 5.9 mm  .157 - .232”  DEFA Series 02-06
 Ø 6.0 – Ø 7.6 mm  .236 - .299”  DEFA Series 07-09
 Ø 7.7 – Ø 8.9 mm  .303 - .350”  DEFA Series 10-11
 Ø 9.0 – Ø 11.1 mm  .354 - .437”  DEFA Series 12-13
 Ø 11.2 – Ø 13.4 mm  .441 - .528”  DEFA Series 14-15
 Ø 13.2 – Ø 16.6 mm  .520 - .654”  DEFA Series 16-17
 Ø 16.8 – Ø 20.4 mm  .661 - .803”  DEFA Series 18-19
 Ø 20.7 – Ø 23.2 mm  .815 - .913”  DEFA Series 22-24
 Ø 26.2 – Ø 29.2 mm  1.031 - 1.150”  DEFA Series 26-28
 Ø 32.2 – Ø 36.2 mm  1.268 - 1.425”  DEFA Series 30-32




   1  Control system
 2  Shank		  3  Blade housing
 4  Blade control		  5  Blade
 






We reserve the right to make technical changes.