MAPAL’s helix milling boosts productivity for large bores

In large bores with high rates of stock removal, cutting to full depth often has to be carried out in multiple steps or with distributed cuts. A popular method of tackling this problem is to pre-machine the bore by circular milling. MAPAL has now further developed this approach by introducing helix milling, where the circular movement of the cutter is combined with axial feed.

When this technique is used in conjunction with the new cutters, high material removal rates and, therefore, efficient bore machining can be achieved even at large cutting depths. The positioning and number of inserts in the new cutters also allows a large immersion angle, thereby further reducing the time required for machining.

MAPAL’s new milling cutters for use with the helix milling technique are available in diameters from 57 mm to 200 mm. The tangential indexable inserts used in the cutters have four cutting edges and are, therefore, particularly economical in use. In addition, the positive and accurate location of the inserts ensures smooth cutting and thus reduces the drive power needed for the cutting operation.

Each size of tool can be used to produce a wide range of bore diameters, and all sizes feature optimally matched cutting geometry combined with high-performance coating.