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WNT launches hybrid solid carbide cutter
WNT launches hybrid solid carbide cutter

WNT launches hybrid solid carbide cutter

Added to MTDCNC by WNT (UK) Ltd on 06 August 2013

Back in 2011 WNT introduced two complementary ranges of solid carbide end milling cutters, its SCR (Steel Cutter Roughing) High Performance Cutters (HPC) and High Feed Cutters (HFC). Both cutters received glowing reviews from customers. However, pressure on customers to improve productivity led WNT to the next step a hybrid of the two, the result being the new SCR Torus cutter.

The SCR Torus cutter from WNT (UK) combines the two roughing strategies of HPC and HFC cutters to create a cutter that is capable of full slot milling to 1xD and other conventional milling operations such as ramping, profiling and pocket milling, and also be capable of high feed (waterline) type milling.  'These new cutters eliminate the need for tool changes between these two rough milling strategies, saving cycle time and also reducing the tool inventory, with one cutter capable of many different operations,' says Adrian Fitts, WNT (UK)’s Business Development Manager.

The key to SCR Torus’ success is the geometry both of the end face and radii, and also of the cutter flutes. The cutter is ground with two large ‘actual’ radii and one theoretical radius on the cutting edge. The first, larger radius provides the SCR Torus cutter with its high feed capability, while the smaller radius generates extended tool life by protecting the cutting edge from premature wear, when conventional milling. These two combine to create the theoretical radius (R3D) for use when programming the cutter path in a CAD/CAM system. The high feed capability of the SCR Torus cutters is aimed at reducing cycle times during rough milling strategies, but can be used for finishing vertical surfaces using the outside diameter if the tool.

When full slot milling the deeper flute design and axial through tool air blast aids swarf evacuation, while the irregular pitch enhances surface finish by reducing vibration and the S-shape profile of the end face of the cutting edges creates a softer cutting action by shearing into the material being cut. The diameter range extends from 3 mm through to 16 mm, all with four flutes as standard.

SCR Torus cutters are generating significant cycle time reductions when compared to indexable insert button tools, with one example where machining a mould tool showing a cycle reduction of 2.5 hours on a mould tool. With the indexable insert tool the operator had to be available by the machine to change inserts when they became worn and the cycle was 3.5 hours. Running the SCR Torus cutter at a typical 160 m/min at a federate of 0,12 mm/tooth and depth of cut of 0,3 mm, the component was completed in a cycle time of one hour, without the need for a toolchange, so the operator was free to undertake other duties.

'The development of SCR Torus really does give customers the best of both worlds with the ability to use multiple roughing machining strategies with a single cutter to maximise metal removal and machine utilisation,' says Adrian Fitts


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