It is due to the extra thick inserts that the former lends itself to machining processes involving very high chip flows (greater cutting depths, high feed rates), while the latter is more suitable for lighter to moderately heavy face milling processes. OctoMill is also extremely flexible as it is suitable for slot, copy, axial, and non-linear milling. The six and eight cutting edges of HexaMill and OctoMill, respectively, also offer an interesting cost price advantage per cutting edge.
The QuattroMill milling cutter is designed exclusively for face milling, particularly on small to medium-sized milling machines. Within these application limits the milling cutter, when combined with the innovative Accu-Fit arbor, performs better than earlier or competitive concepts, and is also simple in its application (for example, in terms of insert indexing compared to the OctoMill). The QuattroMill requires less expertise and skill from the operator, allows faster insert indexing, and yet produces a perfect result in terms of productivity, surface finish, and tool life. In the case of difficult materials (hardened steel grades, stainless steel, and super alloys), the QuattroMill is preferable because it is evident from detailed tests that this milling cutter performs better, thanks to the lighter cutting process, a consequence of the geometry of the insert and seat. The milling cutter will also perform well when milling parts, which have been clamped by a vacuum method, for example, in the case of non-optimum clamping systems and thin-walled workpieces. When high productivity is an overriding consideration, the QuattroMill is the natural choice, as many practical tests demonstrate. High productivity is expressed in cost savings which more than make up for the slightly higher costs of the inserts per cutting edge (four cutting edges instead of six or eight).
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