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Sandvik Coromant has introduced a new generation of CoroTap 100 and CoroTap 400 taps for short chipping and chip-free tapping of aluminum. The taps are designed to offer high process security and predictable tool life, while meeting strict process security demands.

The CoroTap 100 straight-flute tap features refined-edge rounding that helps to remove burrs and improve surface finish. The combination of core thickness, rake/relief angles and land width provide optimal flute geometry and chip evacuation. The back chamfer helps to improve the threading capacity when threading deep holes.

The CoroTap 400 forming tap has an optimized lobe shape developed for aluminum machining and a low-friction coefficient surface treatment for a smooth, polished thread surface finish. With a reduced thread length, the tap is less in contact with the material, reducing power consumption and torque. Staggered coolant holes provide optimal coolant flow into the thread-forming zone and a safe forming process.

The new straight flute tap and forming tap are designed to increase productivity and reduce cost per part. “Both geometries are combined with the latest surface treatments, substrates and coatings, which offer the possibility to use higher cutting data with significantly improved tool life, leading to a reduction in cost per part,” says Robert Smith, offer manager for holemaking and composites at Sandvik Coromant.

Both taps can be used for blind and through holes in many different components, such as cylinder blocks, cylinder heads, electric motor housings, transmission housings and battery racks. They are said to be beneficial for manufacturers that machine aluminum, including automotive, e-mobility and general engineering.