Streamliner lathe toolholders feature coolant delivery through the shank and are said to be suited for low- or high-pressure delivery. To conserve coolant, the toolholders are equipped with interchangeable coolant-distribution plates for various volumes of air, mist or liquid. The coolant delivery is parallel to the top of the insert, which enables the coolant to have a positive effect at the shear zone. The close proximity of the coolant orifice to the insert’s cutting edge prevents the coolant stream from collecting air and spreading apart. The resulting higher density helps quench the chip faster to produce a tight curl and offer good chip control, the company says. In addition, the dense stream is said to reduce the amount of coolant evaporation compared to flood coolant delivery. The toolholder is available in 1" and 25-mm square shanks in right- and left-handed versions.