For parts that are less than 0.125" (3.18-mm) in diameter, Tungaloy America Inc. introduced a series of high-positive, low-cutting-force, screw-down, dead-sharp inserts and toolholders last year. There are four chipbreakers: JS features a molded chipbreaker and the JRP, JPP, and JSP inserts.
Genevieve Swiss Industries has introduced UTILIS Multidec 1600 series thin grooving and micro turning tools capable of work under .125" in diameter utilizing insert widths from thickness of human hair (.0019") up to .108" with cutting edge repeatability within .0004".