Escalating cost pressures are forcing manufacturers of gray cast iron brake disks and fly wheels to look for cost-cutting solutions.  Silicon Nitride inserts deliver higher productivity and longer tool life than coated carbide, at a fraction of the cost of CBN inserts.  Romay has developed the extremely hard, wear resistant CC-515 grade of Silicon Nitride to be used for roughing and finishing of gray, ductile, and nodular cast iron at elevated speeds.  To ensure secure seating, the inserts are available with dimple design clamping.  Here is a sample of what I’m talking about from our 2010 Catalog:

Stop by our website and see what Romay can do for you, or just give us a call on the telephone(like the old days!).  Dave or I would be happy to help engineer your machining solution.