100R Series

Tool 100Ri156FA

Small diameter roughers snap when you push them. The chip load per tooth drops so low that you're rubbing instead of cutting, building heat until the tool fails. The 100Ri156FA addresses this with TiAlSiN coating that handles the thermal stress better than uncoated carbide while the chipbreaker geometry keeps chips moving even at reduced feeds.

At 0.1563" diameter, you're working in confined spaces where chip evacuation matters more than raw aggression.
The 4-flute design gives you more cutting edges to distribute the load while the 0.004" chamfer strengthens each edge against microchipping.
This isn't about surface finish - it's about clearing material from tight geometries in steel, iron, titanium, and nickel alloys without the tool walking or deflecting mid-cut.
The coating extends tool life when heat buildup is unavoidable.
Small tools run hot by nature.