Indexable inserts improve cutting performance

Walter has announced the Silver Tiger CVD-coated indexable inserts, offering 50 to 100 per cent improvements in cutting performance in milling, turning and drilling applications.

This is due to its CVD surface-treatment process (Al2O3 grade coating), said to significantly reduce in-cycle machining stresses in wet and dry applications.

In a recent application the insert exceeded the cutting life of a standard mill in the machining of a large welded hollow ST37 frame.

The launch begins with the universal WKP 35S for milling cast-iron and steel workpieces and, in terms of the ST37 frame, the insert was used in an Xtra.tec F4042 shoulder-mill run at 400m/min, 0.2mm/rev feed and at depths of cut between 1.5-3mm.

Silver Tiger was used to machine surfaces on the frame's top and bottom inner surfaces, measuring approximately 3,500 by 500mm, using interrupted cutting to overcome pre-machined holes.

Walter's Silver Tiger machined both inner surfaces then went on to efficiently and effectively machine the surfaces of a projection that was welded inside the hollow frame.

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