With the FW4 and MW4 wiper geometries, Walter is launching two turning indexable insert geometries which combine the "wiper effect" with new chip breaker geometries and extremely wear-resistant Walter Tiger·tec® Gold grades. The curved wiper edge sweeps over the surface again, making it possible either to double the feed and increase productivity by 100 per cent, or to double the surface quality while maintaining the same feed. With the new geometries, Walter is now also transferring this effect from the FW5 and MW5 double-sided cutting inserts to indexable inserts with a positive basic shape. The result is the FW4 geometry with a narrow chip breaker for finishing operations and the MW4 geometry with an open chip breaker groove and longer radiused wiper cutting edge for medium machining.
Both geometries are designed for universal application in ISO materials P, M and K, as well as for secondary applications in ISO S. Both the FW4 and MW4 geometries make it possible to achieve improved surface quality, productivity and process reliability. Thanks to the wiper edge with its curved design, this also applies when the machine is not aligned 100 per cent precisely (for example after a crash or if the turret is slightly offset). The new chip breakers also increase the chip breaking range resulting in less machine downtime caused by bird nesting. Higher feeds lower the tool's machining and therefore contact times, increasing its tool life and reducing the indexing times. The combination of double the productivity and/or surface quality is particularly appealing for series producers, as the aforementioned benefits are multiplied in series production.