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Flap track

The flap track is located in the trailing edge mechanism. This component is normally produced in stainless steels such as 15-5 PH etc.

Milling of 2D pocket

CoroMill 390 end mill - size 17 mm insert, together with grades GC2040/GC4240 is an ideal choice for the 2D roughing of the pocket. The size 17 insert comes in a radius range of 0.4- 6.4 mm.


Face milling

Enter the workpiece smoothly with CoroMill® 345 by lowering feed to 50% until the cutter is fully engaged. This high performance tool is equipped with an 8-edged insert for the best economy and productivity.

CoroMill 345 (up to diameter 125 mm) has coolant supply to each insert pocket ensuring good chip evacuation for the best performance when machining demanding materials.

CoroMill 345

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The CoroMill 331 is the ideal solution when machining the deeps slots in the flap track. Spring-loaded cassettes provide easy setting for desired width. Cutters are delivered within 0.01 mm width. To achieve a close tolerance, use the H tolerance inserts. Round insert options and a vast assortment of corner radii.

2D profile milling

The best choice for roughing the 2D profile is CoroMill 390 long edge with 18 mm size insert and specialized grades GC2040 and GC4240. The CoroMill 390 with 18 mm insert has a tougher edge for higher feeds and heavier applications. It is also available in a wide range of radius inserts.

Read more about CoroMill 390


Application hints stainless


  • Use high cutting speeds (vc = 150-250 m/min) to avoid built-up edge.
  • In roughing we recommend running dry, without cutting fluid, to minimize problems with thermal cracks.



  • In finishing, cutting fluid, or preferably mist coolant/minimal lubrication, is sometimes necessary to improve the surface finish. There are fewer problems with thermal cracks in finish milling, because the heat generated in the cutting zone is lower.
  • With a cermet grade, CT530, sufficient surface finish can be obtained without cutting fluid.
  • A feed, fz, that is too low can cause higher insert wear because the edge is cutting in the deformation hardened zone.


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