Machinists aren’t likely surprised by the fact that the tool used in the long-reach application depicted in the video above features button-style inserts (courtesy of Ingersoll Cutting Tools, the video showcases the Form master R). Look a bit closer, however, and you’ll notice that those double-sided inserts aren’t perfectly round. Rather, the cutting edges are serrated. Employed correctly, a toothed edge can add to the strength and stability that have made button inserts so popular for heavy roughing. This January-issue article provides more information.

Serrated button inserts like Ingersoll’s Form Master Pro, shown here, can offer greater stability than a straight edge in particularly long-reach applications. However, there are trade-offs involved, and making the most of this technology requires carefully considering the details of each individual application.

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