240 Series

Tool 240i125C

Small diameter aluminum work amplifies the heat problem. At 0.125" cutting diameter, there's less mass to absorb generated heat, and conventional coatings can actually trap it against the cutting edge.

The TiB₂ coating on this tool runs cooler than standard options because it conducts heat away from the edge rather than insulating it.
This matters when you're pushing feed rates on delicate parts where thermal expansion becomes the enemy.
The R0.004" corner radius strengthens the cutting edge without compromising the sharp geometry aluminum demands.
Two flutes keep chip pockets large relative to the small cutting diameter, preventing the chip packing that kills small tools fast.
Built for precision aluminum components, copper electrode work, and plastic machining where surface finish and dimensional stability matter more than maximum material removal rates.