Made for cutting fiberglass, carbide, and ceramic, these inserts have a PCD (polycrystalline diamond) edge that’s extremely hard and resistant to heat and wear. You can also use them on nonferrous metals like aluminum, brass, or bronze. They’re designed for continuous cutting conditions, which means the insert stays in constant contact with the workpiece. Use these inserts at the end of your turning process to finish workpieces—they remove minimal material and leave a smooth surface finish. They come factory sealed from the manufacturer for maximum traceability. Install them into a matching holder.

Inserts with a larger tip radius remove more material with each pass but cut less precisely than smaller inserts. Select the insert with the largest tip radius that still turns your workpiece to the desired shape.

Inserts with a shorter cutting edge are best for precision cuts and low-volume applications; a longer edge can handle deep cuts and heavy machining.

Negative-rake inserts are the first choice for most turning applications. With strong cutting edges on two faces, they last longer than comparable positive-rake inserts. When all the edges on one face are worn, flip the insert over. Positive-rake inserts stick out in front of the holder to reach tight spaces on the workpiece. However, they only have cutting edges on one side.