Customer provided sprocket blanks. Using a U drill we machined the internal bore for a tight fit.

The 20mm U drill is fitted with ST-YG602 inserts, designed for stainless steel, featuring a 0.4mm corner radius and 4 cutting edges per insert. Priced at £9.56 each (x2), they offer a cost-effective and efficient solution for machining Duplex.

Running at 100 RPM with a 0.2mm/rev feed rate and 5mm depth of cut, the inserts have completed a small batch of 10 parts without needing replacement—highlighting their durability in tough materials.