Added dimension to chip control

It now includes the Sumidia ‘Break Master’ with specialised NLD/NGD 3D chipbreakers for semi- and fine finishing tasks. The DA1000 has proven to have a distinct advantage for users involved with heavier and interrupted cutting cycles in wrought and cast aluminium alloys due to its strength, shear and wear resistance which is some 1.5 times greater than conventional PCD grades. Also, the DA1000 insert has a level of toughness similar to carbide.

Both Break Master chipbreaker designs incorporate a 3D presentation for the top rake angle with the NLD type able to achieve high levels of surface quality due to its improved chip control and a sharp cutting edge with a 25° top rake. Meanwhile, the NGD type with a 20° top rake is ideally suitable for more general machining cycles and medium finishing cuts.

The Sumidia PCD range uses a fine sintered diamond powder on a carbide substrate which is ideal for non-metallic materials and non-ferrous machining. According to the application, NLD and NGD chipbreaker inserts have a wide application range able to be run at cutting speeds between 100 and 3,000m/minute with optimised feed rates around 0.15mm/revolution. Depths of cut for NLD are between 0.1mm and 0.8mm while NGD should be between 0.5mm and 2mm.

Sumitomo Electric Hardmetal www.sumitomotool.com